Re: Data replication at a remote site - elementary doubt
Joe jeffries wrote: Bearing in mind that XRC was intended for eXtended Remote Copy, what would be the point of NOT having a datamover at the remote site? -- Possibly the cost of maintaining a processor to drive it, witht eh attendant infrastructure costs. YMMV -- 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: Data replication at a remote site - elementary doubt
Good question! I suppose XRC could be used solely as an offsite vaulting mechanism. In a cold site setup, it could save NALC operating system software dollars, but those charges aren't significant enough (to me) to recommend an XRC push. John's scenario gives a good reason for a push, but that, hopefully, is not an ongoing situation. :-) Most scenarios discussed thus far relate to DR considerations where existing CEC(s) are available. Push? Just say NO! Bob Richards (GDPS/XRC user) -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Joe jeffries Sent: Friday, January 05, 2007 9:48 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Data replication at a remote site - elementary doubt Bearing in mind that XRC was intended for eXtended Remote Copy, what would be the point of NOT having a datamover at the remote site? JJ XRC user LEGAL DISCLAIMER The information transmitted is intended solely for the individual or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of or taking action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you have received this email in error please contact the sender and delete the material from any computer. SunTrust and Seeing beyond money are federally registered service marks of SunTrust Banks, Inc. [ST:XCL] -- 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: Data replication at a remote site - elementary doubt
Bearing in mind that XRC was intended for eXtended Remote Copy, what would be the point of NOT having a datamover at the remote site? JJ XRC user -- 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: Data replication at a remote site - elementary doubt
Hal Merritt wrote: I'm afraid I must respectfully disagree with the collective wisdom of the group :-) The most technically correct answer to your questions is: it depends. We used to do the controller to controller method (IBM's PPRC), but have recently implemented IBM's XRC. XRC requires a live operating system running at the remote site to manage the replication. Just to complement: XRC requires datamover. It need not be neither remote, nor separate system. -- Radoslaw Skorupka Lodz, Poland -- 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: Data replication at a remote site - elementary doubt
Sorry. Please correct my last sentence to read: "Our implementation of XRC requires a live operating system running at the remote site to manage the replication." My attempt at brevity was a bit too aggressive :-) -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Rick Fochtman Sent: Tuesday, January 02, 2007 11:56 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Data replication at a remote site - elementary doubt -- >I'm afraid I must respectfully disagree with the collective wisdom of the group :-) > >The most technically correct answer to your questions is: it depends. > >We used to do the controller to controller method (IBM's PPRC), but have recently implemented IBM's XRC. XRC requires a live operating system running at the remote site to manage the replication. > > --- Not true; XRC can be "driven" from either end. We evaluated both possibilities and found that having the DataMover at the remote site was more cost-effective than running it locally, thanks to services provided at the remote site by our DR provider. NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. -- 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: Data replication at a remote site - elementary doubt
What he said is true. It does depend upon the choices taken. Tom Moulder -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Rick Fochtman Sent: Tuesday, January 02, 2007 11:56 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Data replication at a remote site - elementary doubt -- >I'm afraid I must respectfully disagree with the collective wisdom of the group :-) > >The most technically correct answer to your questions is: it depends. > >We used to do the controller to controller method (IBM's PPRC), but have recently implemented IBM's XRC. XRC requires a live operating system running at the remote site to manage the replication. > > --- Not true; XRC can be "driven" from either end. We evaluated both possibilities and found that having the DataMover at the remote site was more cost-effective than running it locally, thanks to services provided at the remote site by our DR provider. -- 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.409 / Virus Database: 268.16.2/613 - Release Date: 1/1/2007 -- 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: Data replication at a remote site - elementary doubt
-- I'm afraid I must respectfully disagree with the collective wisdom of the group :-) The most technically correct answer to your questions is: it depends. We used to do the controller to controller method (IBM's PPRC), but have recently implemented IBM's XRC. XRC requires a live operating system running at the remote site to manage the replication. --- Not true; XRC can be "driven" from either end. We evaluated both possibilities and found that having the DataMover at the remote site was more cost-effective than running it locally, thanks to services provided at the remote site by our DR provider. -- 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: Data replication at a remote site - elementary doubt
I'm afraid I must respectfully disagree with the collective wisdom of the group :-) The most technically correct answer to your questions is: it depends. We used to do the controller to controller method (IBM's PPRC), but have recently implemented IBM's XRC. XRC requires a live operating system running at the remote site to manage the replication. -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mautalen Juan Guillermo Sent: Tuesday, January 02, 2007 7:59 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Data replication at a remote site - elementary doubt Hi, Sorry for this very basic question, but i am not a system programmer (just a RACF administrator). When you implement synchronuous (or asynchronuous) copy of your DASD data to a remote site, is it necessary for the remote site to have a z/OS system active? Or is the copy performed at a hardware level between both DASD controllers? Thanks for your help, Juan Mautalen NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. -- 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: Data replication at a remote site - elementary doubt
Jeffrey brings up a good point to remember when involved with remote mirroring of data. There are some errors that occur, perhaps especially because of program errors, where you simply do not know that the data is bad until well after the time for asynchronous mirroring to have completed. In this case, you have two copies of the bad data. There is a value to have point in time copies that are taken before major updates take place in the application data that can be used as recovery points should you encounter program problems that result in corrupted data. Also, these situations can be handled with Log analysis software through surgical repair of the data as opposed to normal recovery processes. Tom Moulder -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Jeffrey Deaver Sent: Tuesday, January 02, 2007 9:53 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Data replication at a remote site - elementary doubt >When you implement synchronuous (or asynchronuous) copy of your DASD >data to a remote site, is it necessary for the remote site to have a >z/OS system active? No. We (async) mirror between two STK V2X4f arrays and there is no host attached at the hot site until we want to use the data there (either for a test or a DR situation) >and until you issue commands that stop the >mirroring (depending on how implemented), the remote site can't have >anything but read access to the data, if at all. Actually, because we use remote snapshot on our remote disk, we can continue with production async mirror process and IPL to a copy of the data on the remote disk with the hot site's MF hardware. We do this every time we have a DR exercise. We have three copies of the data on the remote disk... 1) The staging copy where the async mirror data is written 2) Copy 1 which is remote snapped every other day 3) Copy 2 which is remote snapped every other day opposite copy 1 So for a DR test we might plan on IPLing Copy1, knowing that the async data will continue to be written to the staging area, and then to Copy 2 for the daily 'synchpoint'. Jeffrey Deaver, Engineer Systems Engineering [EMAIL PROTECTED] 651-665-4231(v) 651-610-7670(p) -- 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.409 / Virus Database: 268.16.2/613 - Release Date: 1/1/2007 -- 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: Data replication at a remote site - elementary doubt
>When you implement synchronuous (or asynchronuous) copy of your DASD >data to a remote site, is it necessary for the remote site to have a >z/OS system active? No. We (async) mirror between two STK V2X4f arrays and there is no host attached at the hot site until we want to use the data there (either for a test or a DR situation) >and until you issue commands that stop the >mirroring (depending on how implemented), the remote site can't have >anything but read access to the data, if at all. Actually, because we use remote snapshot on our remote disk, we can continue with production async mirror process and IPL to a copy of the data on the remote disk with the hot site's MF hardware. We do this every time we have a DR exercise. We have three copies of the data on the remote disk... 1) The staging copy where the async mirror data is written 2) Copy 1 which is remote snapped every other day 3) Copy 2 which is remote snapped every other day opposite copy 1 So for a DR test we might plan on IPLing Copy1, knowing that the async data will continue to be written to the staging area, and then to Copy 2 for the daily 'synchpoint'. Jeffrey Deaver, Engineer Systems Engineering [EMAIL PROTECTED] 651-665-4231(v) 651-610-7670(p) -- 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: Data replication at a remote site - elementary doubt
Vernooy, C.P. - SPLXM wrote: "Mautalen Juan Guillermo" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... Hi, Sorry for this very basic question, but i am not a system programmer (just a RACF administrator). When you implement synchronuous (or asynchronuous) copy of your DASD data to a remote site, is it necessary for the remote site to have a z/OS system active? Or is the copy performed at a hardware level between both DASD controllers? Thanks for your help, Juan Mautalen The last: between the Dasd controllers. The remote devices aren't even accessable by a host at the remote site. It depends on your DASD manufacturer. AFAIK EMC secondary (R2) devices are accessible for R/O. -- Radoslaw Skorupka Lodz, Poland -- 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: Data replication at a remote site - elementary doubt
got it
thanks
"Chase, John"
<[EMAIL PROTECTED]
> To
Sent by: IBM IBM-MAIN@BAMA.UA.EDU
Mainframe cc
Discussion List
<[EMAIL PROTECTED] Subject
.EDU> Re: Data replication at a remote
site - elementary doubt
01/02/2007 09:59
AM
Please respond to
IBM Mainframe
Discussion List
<[EMAIL PROTECTED]
.EDU>
> -Original Message-
> From: IBM Mainframe Discussion List On Behalf Of August Carideo
>
> how is Z/os not installed ?
The machine (z890 in CBU configuration) is not plugged in yet.
> your not replicating your system packs ?
We replicate "everything".
> our SRDF environment copies all , so all you have to do is
> IPL from the remote site if needed are you just replicating
> data for backup purposes not DR
It's a "work in progress".
-jc-
--
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: Data replication at a remote site - elementary doubt
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Mautalen Juan Guillermo Sent: Tuesday, January 02, 2007 7:59 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Data replication at a remote site - elementary doubt Hi, Sorry for this very basic question, but i am not a system programmer (just a RACF administrator). When you implement synchronuous (or asynchronuous) copy of your DASD data to a remote site, is it necessary for the remote site to have a z/OS system active? Or is the copy performed at a hardware level between both DASD controllers? Thanks for your help, No it is not required. And until you issue commands that stop the mirroring (depending on how implemented), the remote site can't have anything but read access to the data, if at all. In the case of a HOT D/R site, the remote processor(s) may be powered, but not IPL'ed. Upon the mirroring being stopped (by commands or by the links being broken for some reason), the "HOT" standby can now IPL. Simple explanation for NON-Tech or someone not deeply involved in remote mirroring. Later, Steve Thompson -- 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: Data replication at a remote site - elementary doubt
> -Original Message- > From: IBM Mainframe Discussion List On Behalf Of August Carideo > > how is Z/os not installed ? The machine (z890 in CBU configuration) is not plugged in yet. > your not replicating your system packs ? We replicate "everything". > our SRDF environment copies all , so all you have to do is > IPL from the remote site if needed are you just replicating > data for backup purposes not DR It's a "work in progress". -jc- -- 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: Data replication at a remote site - elementary doubt
how is Z/os not installed ?
your not replicating your system packs ?
our SRDF environment copies all , so all you have to do is IPL from the
remote site if needed
are you just replicating data for backup purposes not DR
"Chase, John"
<[EMAIL PROTECTED]
> To
Sent by: IBM IBM-MAIN@BAMA.UA.EDU
Mainframe cc
Discussion List
<[EMAIL PROTECTED] Subject
.EDU> Re: Data replication at a remote
site - elementary doubt
01/02/2007 09:45
AM
Please respond to
IBM Mainframe
Discussion List
<[EMAIL PROTECTED]
.EDU>
> -Original Message-
> From: IBM Mainframe Discussion List On Behalf Of Mautalen Juan
Guillermo
>
> Hi,
>
> Sorry for this very basic question, but i am not a system
> programmer (just a RACF administrator).
>
> When you implement synchronuous (or asynchronuous) copy of
> your DASD data to a remote site, is it necessary for the
> remote site to have a z/OS system active?
> Or is the copy performed at a hardware level between both
> DASD controllers?
We do asynchronous replication between the DASD controllers. We don't
have z/OS installed at the remote site yet.
-jc-
--
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: Data replication at a remote site - elementary doubt
> -Original Message- > From: IBM Mainframe Discussion List On Behalf Of Mautalen Juan Guillermo > > Hi, > > Sorry for this very basic question, but i am not a system > programmer (just a RACF administrator). > > When you implement synchronuous (or asynchronuous) copy of > your DASD data to a remote site, is it necessary for the > remote site to have a z/OS system active? > Or is the copy performed at a hardware level between both > DASD controllers? We do asynchronous replication between the DASD controllers. We don't have z/OS installed at the remote site yet. -jc- -- 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: Data replication at a remote site - elementary doubt
"Mautalen Juan Guillermo" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > Hi, > > Sorry for this very basic question, but i am not a system programmer > (just a RACF administrator). > > When you implement synchronuous (or asynchronuous) copy of your DASD > data to a remote site, is it necessary for the remote site to have a > z/OS system active? > Or is the copy performed at a hardware level between both DASD > controllers? > > Thanks for your help, > > > > Juan Mautalen The last: between the Dasd controllers. The remote devices aren't even accessable by a host at the remote site. Kees. ** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ** -- 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
Data replication at a remote site - elementary doubt
Hi, Sorry for this very basic question, but i am not a system programmer (just a RACF administrator). When you implement synchronuous (or asynchronuous) copy of your DASD data to a remote site, is it necessary for the remote site to have a z/OS system active? Or is the copy performed at a hardware level between both DASD controllers? Thanks for your help, Juan Mautalen -- 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
