Re: Keep only the tail of the dataset
On Mon, 28 Jan 2008 17:04:26 -0600, Luis Miguel Martinez [EMAIL PROTECTED] wrote: Have you tried with the USS command: tail -n //'my.dataset.to.read' where n would be the number of lines Please let me know if you could do it. That should work. But why -n without a value? It would be tail -n nnn //'my.dataset.to.read' where nnn is the number of lines wouldn't it? With BPXBATCH and z/OS 1.8 (or 1.5-1.7 with the proper maintenance) STDOUT can point to a MVS data set. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
On Tue, 29 Jan 2008 15:49:54 -, Van Dalsen, Herbie [EMAIL PROTECTED] wrote: Sorry, I am still on z/OS 1.6... If you have the PTF for OA11699 (UA23196) then you can direct STDOUT to SYSOUT or a MVS data set. It's old at this point... it has been available since December 2005. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: 29 Januarie 2008 02:48 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Mon, 28 Jan 2008 17:04:26 -0600, Luis Miguel Martinez [EMAIL PROTECTED] wrote: Have you tried with the USS command: tail -n //'my.dataset.to.read' where n would be the number of lines Please let me know if you could do it. That should work. But why -n without a value? It would be tail -n nnn //'my.dataset.to.read' where nnn is the number of lines wouldn't it? With BPXBATCH and z/OS 1.8 (or 1.5-1.7 with the proper maintenance) STDOUT can point to a MVS data set. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
Thanks. -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: 29 Januarie 2008 03:56 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Tue, 29 Jan 2008 15:49:54 -, Van Dalsen, Herbie [EMAIL PROTECTED] wrote: Sorry, I am still on z/OS 1.6... If you have the PTF for OA11699 (UA23196) then you can direct STDOUT to SYSOUT or a MVS data set. It's old at this point... it has been available since December 2005. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: 29 Januarie 2008 02:48 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Mon, 28 Jan 2008 17:04:26 -0600, Luis Miguel Martinez [EMAIL PROTECTED] wrote: Have you tried with the USS command: tail -n //'my.dataset.to.read' where n would be the number of lines Please let me know if you could do it. That should work. But why -n without a value? It would be tail -n nnn //'my.dataset.to.read' where nnn is the number of lines wouldn't it? With BPXBATCH and z/OS 1.8 (or 1.5-1.7 with the proper maintenance) STDOUT can point to a MVS data set. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
Sorry, I am still on z/OS 1.6... -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: 29 Januarie 2008 02:48 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Mon, 28 Jan 2008 17:04:26 -0600, Luis Miguel Martinez [EMAIL PROTECTED] wrote: Have you tried with the USS command: tail -n //'my.dataset.to.read' where n would be the number of lines Please let me know if you could do it. That should work. But why -n without a value? It would be tail -n nnn //'my.dataset.to.read' where nnn is the number of lines wouldn't it? With BPXBATCH and z/OS 1.8 (or 1.5-1.7 with the proper maintenance) STDOUT can point to a MVS data set. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
No, I am not... Paul Gilmartin wrote the following in this thread... Why not? I have successfully ftp'ed raw (binary) SMF data, including the RDWs from z/OS to Linux. I can then read the file using Java, decoding the RDWs. UNIX itself does not care what data is being written to a file. It is just a byte stream. Of course, if the creating program itself does not have some way to delimit an end-of-record, then it __might__ not be possible to reliably read the data. E.g. undefined records which don't have an RDW, nor an end-of-record indicator (like program objects). Regards Herbie -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin Sent: 29 Januarie 2008 01:50 To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Mon, 28 Jan 2008 18:51:47 -, Van Dalsen, Herbie wrote: Hang on, I must be missing something... This is my output from the tail command in OMVS in tso, which I am sure can be used in BPXbatch. So If you mount your dataset in OMVS / USS as /var/tailin OMVS.TAILIN and a second one as /var/tailout OMVS.TAILOUT(empty) and issue the command tail /var/tailin /var/tailout, won't you get the best results ? No messing around with other unix systems etc and code that someone needs to rewrite in 2 year's time? You're the first person who has mentioned other unix systems; I believe the rest of us had assumed from the beginning z/OS Unix System Services. This still leaves unanswered my concerns about binary data in RECFM=V(B) and John M.'s about short generations. -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
This might have been mentioned, but using our free Dataset Pipes tool, this is pretty easy if your file is text, since tail would work: // EXEC DTLSPAWN //LOG DD DISP=OLD,DSN=... //STDIN DD * fromdsn //DD:LOG \ | tail -2000 \ | todsn //DD:LOG // If the dataset has fixed length, binary records (say length=100), then you can do this: // EXEC DTLSPAWN //LOG DD DISP=OLD,DSN=... //STDIN DD * fromdsn -b //DD:LOG \ | tail -c -20 \ | todsn -b //DD:LOG // But, if the data is variable AND binary, then you can't use newlines to terminate the stream (the default for fromdsn and todsn). You could write a program like tail that uses ibm rdws as record prefixes. The program would read all of the records from stdin into a wrap-around table of the limiting size and then write the table out to stdout. Then you could have this: // EXEC DTLSPAWN //LOG DD DISP=OLD,DSN=... //STDIN DD * fromdsn -l ibmrdw //DD:LOG \ | rdw-tail -2000 \ | todsn -l ibmrdw //DD:LOG // (Of course, if you are going to write a program like this, you could have it just update the dataset rather than piping). On Jan 29, 2008 10:13 AM, Van Dalsen, Herbie [EMAIL PROTECTED] wrote: Thanks. -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: 29 Januarie 2008 03:56 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Tue, 29 Jan 2008 15:49:54 -, Van Dalsen, Herbie [EMAIL PROTECTED] wrote: Sorry, I am still on z/OS 1.6... If you have the PTF for OA11699 (UA23196) then you can direct STDOUT to SYSOUT or a MVS data set. It's old at this point... it has been available since December 2005. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: 29 Januarie 2008 02:48 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Mon, 28 Jan 2008 17:04:26 -0600, Luis Miguel Martinez [EMAIL PROTECTED] wrote: Have you tried with the USS command: tail -n //'my.dataset.to.read' where n would be the number of lines Please let me know if you could do it. That should work. But why -n without a value? It would be tail -n nnn //'my.dataset.to.read' where nnn is the number of lines wouldn't it? With BPXBATCH and z/OS 1.8 (or 1.5-1.7 with the proper maintenance) STDOUT can point to a MVS data set. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
And none of these relate to the original post. The OP wanted a automatic way to have a file wrap around after n writes. He did not want a way to write n entries to the file and then later only see the last n entries in the file. He wanted the n+1 write to be written as the first record on the file, n+2 to be the second, and so on. There is basically no way to get what the OP wanted without changing his program, which he indicated is not an option. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: Tuesday, January 29, 2008 4:17 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Tue, 29 Jan 2008 15:35:09 -0600, McKown, John [EMAIL PROTECTED] wrote: And none of these relate to the original post. The OP wanted a automatic way to have a file wrap around after n writes. snip I'm not so sure of that. Re-read it. To me is sounded like the OP had this large file, but was only interested in the last n records. Perhaps they will clarify. Mark Yes, after rereading the OP, I can see that now. So, the simple way is to put the data to a temporary file, then write another small program which buffers the last n records in memory. When that program gets EOF, then write the buffered records. Or use the tail command as so many others have indicated. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
John, Sorry, I read the original question to mean how can I truncate a dataset to the last n lines. In any case, I agree with your earlier post - if you really want it to only *ever* keep the last n lines, then an wrap-around RRDS is the way to go (if you can change the program). Kirk On Jan 29, 2008 3:35 PM, McKown, John [EMAIL PROTECTED] wrote: And none of these relate to the original post. The OP wanted a automatic way to have a file wrap around after n writes. He did not want a way to write n entries to the file and then later only see the last n entries in the file. He wanted the n+1 write to be written as the first record on the file, n+2 to be the second, and so on. There is basically no way to get what the OP wanted without changing his program, which he indicated is not an option. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
On Tue, 29 Jan 2008 15:35:09 -0600, McKown, John [EMAIL PROTECTED] wrote: And none of these relate to the original post. The OP wanted a automatic way to have a file wrap around after n writes. snip I'm not so sure of that. Re-read it. To me is sounded like the OP had this large file, but was only interested in the last n records. Perhaps they will clarify. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Miklos Szigetvari Sent: Monday, January 28, 2008 2:10 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Keep only the tail of the dataset Hi Searching for a method to keep/access only the tail of a dataset. An application writes internal traces , several million lines. I would like to keep only the last part of the trace. Any simple method to achive this ? (Currently I can think to pipe under USS , and write a small program to wrap around ) -- Miklos Szigetvari If you want a wrap around type log, then I think that the easiest way to do so would be to have a preformatted BDAM or VSAM RRDS dataset. I'd personally go with the RRDS. Have the first record be dedicated to keeping the next record number to write. Also, have the maximum record number in there. Now have your subroutine simply increment the record number and wrap around from the max to 1 (skipping 0). You could either update record 0 upon every write (high overhead) or only periodically. I would also keep a timestamp in every record so that you could use SORT to put the records in order. This is about as simple as I can think of off-hand. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
On Mon, 28 Jan 2008 09:10:01 +0100, Miklos Szigetvari [EMAIL PROTECTED] wrote: Hi Searching for a method to keep/access only the tail of a dataset. An application writes internal traces , several million lines. I would like to keep only the last part of the trace. Any simple method to achive this ? (Currently I can think to pipe under USS , and write a small program to wrap around ) -- If you know how many records, you can use IDCAMS REPRO with SKIP(nnn). If you don't know how many records, you would have to determine that first and could generate the JCL with REXX for example. There are many ways to find the number of records but the quickest may be to use the ICETOOL or SYNCTOOL COUNT function. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
If you only want the last 2,000 records or so, why not just close the file and reopen it every 3,000 or so records? Bill Date: Mon, 28 Jan 2008 15:41:03 +0100 From: [EMAIL PROTECTED] Subject: Re: Keep only the tail of the dataset To: IBM-MAIN@BAMA.UA.EDU Hi I mean the program is ready and working , so no program modification, and it shoud happen in flight For example keep only the last part of the trace. McKown, John wrote: -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Miklos Szigetvari Sent: Monday, January 28, 2008 2:10 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Keep only the tail of the datasetHi Searching for a method to keep/access only the tail of a dataset. An application writes internal traces , several million lines. I would like to keep only the last part of the trace. Any simple method to achive this ? (Currently I can think to pipe under USS , and write a small program to wrap around ) -- Miklos Szigetvari If you want a wrap around type log, then I think that the easiest way to do so would be to have a preformatted BDAM or VSAM RRDS dataset. I'd personally go with the RRDS. Have the first record be dedicated to keeping the next record number to write. Also, have the maximum record number in there. Now have your subroutine simply increment the record number and wrap around from the max to 1 (skipping 0). You could either update record 0 upon every write (high overhead) or only periodically. I would also keep a timestamp in every record so that you could use SORT to put the records in order. This is about as simple as I can think of off-hand. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- Miklos Szigetvari Development Team ISIS Information Systems Gmbh tel: (+43) 2236 27551 570 Fax: (+43) 2236 21081 E-mail: [EMAIL PROTECTED] Info: [EMAIL PROTECTED] Hotline: +43-2236-27551-111 Visit our Website: http://www.isis-papyrus.com --- This e-mail is only intended for the recipient and not legally binding. Unauthorised use, publication, reproduction or disclosure of the content of this e-mail is not permitted. This email has been checked for known viruses, but ISIS accepts no responsibility for malicious or inappropriate content. --- -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
On Mon, 28 Jan 2008 08:16:09 -0600, Mark Zelden wrote: On Mon, 28 Jan 2008 09:10:01 +0100, Miklos Szigetvari wrote: Searching for a method to keep/access only the tail of a dataset. An application writes internal traces , several million lines. I would like to keep only the last part of the trace. Any simple method to achive this ? (Currently I can think to pipe under USS , and write a small program to wrap around ) -- If you know how many records, you can use IDCAMS REPRO with SKIP(nnn). If you don't know how many records, you would have to determine that first and could generate the JCL with REXX for example. There are many ways to find the number of records but the quickest may be to use the ICETOOL or SYNCTOOL COUNT function. Is this a good application for a GDG? If this is a long-running application, is there a way to roll the generation in midstream? Can this be done without losing trace records during the switch? Would UNIX files be an alternative? There is a well-established UNIX convention for rolling daemon logs: o An external process renames the logfile. The daemon continues to write to the renamed logfile as long as it holds it open. o Either periodically or in response to an exteral signal (customarily SIGHUP) the daemon closes and reopens the logfile, now writing to a fresh logfile under the old name. -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
Hi I mean the program is ready and working , so no program modification, and it shoud happen in flight For example keep only the last part of the trace. McKown, John wrote: -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Miklos Szigetvari Sent: Monday, January 28, 2008 2:10 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Keep only the tail of the dataset Hi Searching for a method to keep/access only the tail of a dataset. An application writes internal traces , several million lines. I would like to keep only the last part of the trace. Any simple method to achive this ? (Currently I can think to pipe under USS , and write a small program to wrap around ) -- Miklos Szigetvari If you want a wrap around type log, then I think that the easiest way to do so would be to have a preformatted BDAM or VSAM RRDS dataset. I'd personally go with the RRDS. Have the first record be dedicated to keeping the next record number to write. Also, have the maximum record number in there. Now have your subroutine simply increment the record number and wrap around from the max to 1 (skipping 0). You could either update record 0 upon every write (high overhead) or only periodically. I would also keep a timestamp in every record so that you could use SORT to put the records in order. This is about as simple as I can think of off-hand. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- Miklos Szigetvari Development Team ISIS Information Systems Gmbh tel: (+43) 2236 27551 570 Fax: (+43) 2236 21081 E-mail: [EMAIL PROTECTED] Info: [EMAIL PROTECTED] Hotline: +43-2236-27551-111 Visit our Website: http://www.isis-papyrus.com --- This e-mail is only intended for the recipient and not legally binding. Unauthorised use, publication, reproduction or disclosure of the content of this e-mail is not permitted. This email has been checked for known viruses, but ISIS accepts no responsibility for malicious or inappropriate content. --- -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin Sent: Monday, January 28, 2008 9:43 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset [snip] Ah, but FTP has the (LOC)SITE RDW command. Alas, DD PATH=... supports no analogous FILEDATA=RDW option. With FILEDATA=BINARY, RDWs are entirely disregarded and the data are streamed; with FILEDATA=TEXT, the RDWs are replaced by 0x15, which might be spoofed by binary data. -- gil That is WEIRD! The BSAM interface actually modifies the binary byte stream with FILEDATA=DATA and RECFM=V by removing the RDW? That is, like, totally gross! What wippo thought __that__ up?!? -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Bill Wilkie Sent: Monday, January 28, 2008 9:16 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset If you only want the last 2,000 records or so, why not just close the file and reopen it every 3,000 or so records? Bill 1) The OP has stated that the program is written and may no longer be modified. 2) Since the program does not know when it may terminate, it is possible that the last OPEN would be just before the program is to terminate, thereby making the trace file have 0 records. Another possibility, which I am not suggesting, but only mentioning, is to use GPSAM from the CBT. This function uses subsystems to redirect Q/BSAM output to another program, similar to a pipe. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin Sent: Monday, January 28, 2008 9:10 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset [snip] Might yet be done allocating the trace file in JCL to a named pipe (FIFO) to be read by a chopping daemon. The FIFO could be allocated and the daemon started in a prior job step. Two likely problems: o If the trace records are variable length containing binary information, that can not be preserved in a Unix file. Why not? I have successfully ftp'ed raw (binary) SMF data, including the RDWs from z/OS to Linux. I can then read the file using Java, decoding the RDWs. UNIX itself does not care what data is being written to a file. It is just a byte stream. Of course, if the creating program itself does not have some way to delimit an end-of-record, then it __might__ not be possible to reliably read the data. E.g. undefined records which don't have an RDW, nor an end-of-record indicator (like program objects). o If the daemon crashes, it soon takes the application down with it. Hum, I haven't tried, but I was under the impression that if the reader went down, the writer would soon stop due to the buffer being full. The writer would then wait until a reader started up again. Oh, wait, yeah, a S522 on the writer might occur if it took too long to restart the reader. -- gil -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Miklos Szigetvari Sent: Monday, January 28, 2008 8:41 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset Hi I mean the program is ready and working , so no program modification, and it shoud happen in flight For example keep only the last part of the trace. Ah! My bad. In that case, I guess you would need to pipe the output to another process which would actually implement the wrap around logic to a file. I don't know of any such program, off hand. Does the Batch PIPES product still exist? That might be easier to implement than doing it yourself using UNIX facilities. The main problem that I see is starting the UNIX receiver process when your program starts. Unless your program is a UNIX program, then it is rather simple to start up the receiver using shell piping. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
On Mon, 28 Jan 2008 08:54:45 -0600, McKown, John wrote: -Original Message- [mailto:[EMAIL PROTECTED] On Behalf Of Miklos Szigetvari Sent: Monday, January 28, 2008 8:41 AM I mean the program is ready and working , so no program modification, and it shoud happen in flight For example keep only the last part of the trace. Ah! My bad. In that case, I guess you would need to pipe the output to another process which would actually implement the wrap around logic to a file. I don't know of any such program, off hand. Does the Batch PIPES product still exist? That might be easier to implement than doing it yourself using UNIX facilities. The main problem that I see is starting the UNIX receiver process when your program starts. Unless your program is a UNIX program, then it is rather simple to start up the receiver using shell piping. Might yet be done allocating the trace file in JCL to a named pipe (FIFO) to be read by a chopping daemon. The FIFO could be allocated and the daemon started in a prior job step. Two likely problems: o If the trace records are variable length containing binary information, that can not be preserved in a Unix file. o If the daemon crashes, it soon takes the application down with it. -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
I take it IDCAMS have not been modified for the last 20 years... It would be nice if it could do what the tail command does in unix/uss/OMVS... Just a thought, maybe read thru the file or use some or other record counter, and only leave you with the last few records on display. Just my wish-list for the day... Herbie -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mark Zelden Sent: 28 Januarie 2008 02:16 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset On Mon, 28 Jan 2008 09:10:01 +0100, Miklos Szigetvari [EMAIL PROTECTED] wrote: Hi Searching for a method to keep/access only the tail of a dataset. An application writes internal traces , several million lines. I would like to keep only the last part of the trace. Any simple method to achive this ? (Currently I can think to pipe under USS , and write a small program to wrap around ) -- If you know how many records, you can use IDCAMS REPRO with SKIP(nnn). If you don't know how many records, you would have to determine that first and could generate the JCL with REXX for example. There are many ways to find the number of records but the quickest may be to use the ICETOOL or SYNCTOOL COUNT function. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
On Mon, 28 Jan 2008 09:18:21 -0600, McKown, John wrote: Might yet be done allocating the trace file in JCL to a named pipe (FIFO) to be read by a chopping daemon. The FIFO could be allocated and the daemon started in a prior job step. Two likely problems: o If the trace records are variable length containing binary information, that can not be preserved in a Unix file. Why not? I have successfully ftp'ed raw (binary) SMF data, including the RDWs from z/OS to Linux. I can then read the file using Java, decoding the RDWs. UNIX itself does not care what data is being written to a file. It is just a byte stream. Of course, if the creating program itself does not have some way to delimit an end-of-record, then it __might__ not be possible to reliably read the data. E.g. undefined records which don't have an RDW, nor an end-of-record indicator (like program objects). Ah, but FTP has the (LOC)SITE RDW command. Alas, DD PATH=... supports no analogous FILEDATA=RDW option. With FILEDATA=BINARY, RDWs are entirely disregarded and the data are streamed; with FILEDATA=TEXT, the RDWs are replaced by 0x15, which might be spoofed by binary data. -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
Hang on, I must be missing something... This is my output from the tail command in OMVS in tso, which I am sure can be used in BPXbatch. So If you mount your dataset in OMVS / USS as /var/tailin OMVS.TAILIN and a second one as /var/tailout OMVS.TAILOUT(empty) and issue the command tail /var/tailin /var/tailout, won't you get the best results ? No messing around with other unix systems etc and code that someone needs to rewrite in 2 year's time? Regards Herbie -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -tailtest-(EOF) # tail tailtest strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html # === RUNNING ESC=¢ 1=Help 2=SubCmd3=HlpRetrn 4=Top 5=Bottom6=TSO 7=BackScr 8=Scroll9=NextSess 10=Refresh 11=FwdRetr 12=Retrieve -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of McKown, John Sent: 28 Januarie 2008 04:59 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin Sent: Monday, January 28, 2008 10:49 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset [snip] On Mon, 28 Jan 2008 09:34:19 -0600, McKown, John wrote: 2) Since the program does not know when it may terminate, it is possible that the last OPEN would be just before the program is to terminate, thereby making the trace file have 0 records. Have you a problem with that? What? Well, if I were expecting to see the last n records output, then I'd be pretty upset to get 0 when I knew that some were indeed output. [snip] This is identical to the behavior of FTP with the BINARY and ASCII options respectively, and absent SITE RDW, both of which have their uses. The wippo merely failed to perceive the need for an RDW option. (is ASCII compatible with RDW?) -- gil Well, I consider it to be weird. Personal opinion, I guess. The Dovetailed Technologies' fromdsn has an option to retain IBM compatable RDWs in the output, or not, as an option. Of course, that doesn't help if I want to output via JCL. So, somebody thought that keeping RDWs might be important. Of course, I don't know how that option would be architected in JCL. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin Sent: Monday, January 28, 2008 10:49 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset [snip] On Mon, 28 Jan 2008 09:34:19 -0600, McKown, John wrote: 2) Since the program does not know when it may terminate, it is possible that the last OPEN would be just before the program is to terminate, thereby making the trace file have 0 records. Have you a problem with that? What? Well, if I were expecting to see the last n records output, then I'd be pretty upset to get 0 when I knew that some were indeed output. [snip] This is identical to the behavior of FTP with the BINARY and ASCII options respectively, and absent SITE RDW, both of which have their uses. The wippo merely failed to perceive the need for an RDW option. (is ASCII compatible with RDW?) -- gil Well, I consider it to be weird. Personal opinion, I guess. The Dovetailed Technologies' fromdsn has an option to retain IBM compatable RDWs in the output, or not, as an option. Of course, that doesn't help if I want to output via JCL. So, somebody thought that keeping RDWs might be important. Of course, I don't know how that option would be architected in JCL. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
On Mon, 28 Jan 2008 09:18:21 -0600, McKown, John wrote: o If the daemon crashes, it soon takes the application down with it. Hum, I haven't tried, but I was under the impression that if the reader went down, the writer would soon stop due to the buffer being full. The writer would then wait until a reader started up again. Oh, wait, yeah, a S522 on the writer might occur if it took too long to restart the reader. I tried. That's how z/OS behaves. However on both OS X and Solaris, with the following program: 535 $ cat breakfifo #! /bin/sh mkfifo foofifo while ( set -x; date ) do sleep 1; done foofifo while ( set -x; head -3 foofifo); do sleep 2; done 536 $ ... I get: 536 $ ./breakfifo mkfifo: foofifo: File exists ./breakfifo 7 +head -3 foofifo ./breakfifo 5 +date Mon Jan 28 09:26:24 MST 2008 ./breakfifo 5 +date Mon Jan 28 09:26:25 MST 2008 ./breakfifo 5 +date Mon Jan 28 09:26:26 MST 2008 ./breakfifo 5 +date ./breakfifo: line 5: 10385 Broken pipe date ./breakfifo 7 +head -3 foofifo ^C ... I'm inclined to distrust any construct where z/OS deviates from the majority of UNIX systems I try; IBM might actually fix it one day. (I haven't consulted POSIX.) On Mon, 28 Jan 2008 09:34:19 -0600, McKown, John wrote: 2) Since the program does not know when it may terminate, it is possible that the last OPEN would be just before the program is to terminate, thereby making the trace file have 0 records. Have you a problem with that? What? On Mon, 28 Jan 2008 09:50:46 -0600, McKown, John wrote: Ah, but FTP has the (LOC)SITE RDW command. Alas, DD PATH=... supports no analogous FILEDATA=RDW option. With FILEDATA=BINARY, RDWs are entirely disregarded and the data are streamed; with FILEDATA=TEXT, the RDWs are replaced by 0x15, which might be spoofed by binary data. That is WEIRD! The BSAM interface actually modifies the binary byte stream with FILEDATA=DATA and RECFM=V by removing the RDW? That is, like, totally gross! What wippo thought __that__ up?!? This is identical to the behavior of FTP with the BINARY and ASCII options respectively, and absent SITE RDW, both of which have their uses. The wippo merely failed to perceive the need for an RDW option. (is ASCII compatible with RDW?) -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Keep only the tail of the dataset
Have you tried with the USS command: tail -n //'my.dataset.to.read' where n would be the number of lines Please let me know if you could do it. Van Dalsen, Herbie [EMAIL PROTECTED] escribió: Hang on, I must be missing something... This is my output from the tail command in OMVS in tso, which I am sure can be used in BPXbatch. So If you mount your dataset in OMVS / USS as /var/tailin OMVS.TAILIN and a second one as /var/tailout OMVS.TAILOUT(empty) and issue the command tail /var/tailin /var/tailout, won't you get the best results ? No messing around with other unix systems etc and code that someone needs to rewrite in 2 year's time? Regards Herbie -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -tailtest-(EOF) # tail tailtest strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html # === RUNNING ESC=¢ 1=Help 2=SubCmd 3=HlpRetrn 4=Top 5=Bottom 6=TSO 7=BackScr 8=Scroll 9=NextSess 10=Refresh 11=FwdRetr 12=Retrieve -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of McKown, John Sent: 28 Januarie 2008 04:59 nm To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Paul Gilmartin Sent: Monday, January 28, 2008 10:49 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Keep only the tail of the dataset [snip] On Mon, 28 Jan 2008 09:34:19 -0600, McKown, John wrote: 2) Since the program does not know when it may terminate, it is possible that the last OPEN would be just before the program is to terminate, thereby making the trace file have 0 records. Have you a problem with that? What? Well, if I were expecting to see the last n records output, then I'd be pretty upset to get 0 when I knew that some were indeed output. [snip] This is identical to the behavior of FTP with the BINARY and ASCII options respectively, and absent SITE RDW, both of which have their uses. The wippo merely failed to perceive the need for an RDW option. (is ASCII compatible with RDW?) -- gil Well, I consider it to be weird. Personal opinion, I guess. The Dovetailed Technologies' fromdsn has an option to retain IBM compatable RDWs in the output, or not, as an option. Of course, that doesn't help if I want to output via JCL. So, somebody thought that keeping RDWs might be important. Of course, I don't know how that option would be architected in JCL. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html Luis Miguel Martinez Chavez IT Specialist DB2 ZOS/LUW Solaris/Linux/AIX - ¡Capacidad ilimitada de almacenamiento en tu correo! No te preocupes más por el espacio de tu cuenta con Correo Yahoo!: http://correo.yahoo.com.mx
Re: Keep only the tail of the dataset
On Mon, 28 Jan 2008 18:51:47 -, Van Dalsen, Herbie wrote: Hang on, I must be missing something... This is my output from the tail command in OMVS in tso, which I am sure can be used in BPXbatch. So If you mount your dataset in OMVS / USS as /var/tailin OMVS.TAILIN and a second one as /var/tailout OMVS.TAILOUT(empty) and issue the command tail /var/tailin /var/tailout, won't you get the best results ? No messing around with other unix systems etc and code that someone needs to rewrite in 2 year's time? You're the first person who has mentioned other unix systems; I believe the rest of us had assumed from the beginning z/OS Unix System Services. This still leaves unanswered my concerns about binary data in RECFM=V(B) and John M.'s about short generations. -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
