Re: FLASHCOPY performance to a DS6800 DASD
I can't help you with the flashcopy question, but I can tell you our dfdss full backups(3390-3) went from 20-25 min to 6-7 min when we changed out to the ds6k. No one could believe it From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Edward M. Martin Sent: Wednesday, July 16, 2008 10:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: FLASHCOPY performance to a DS6800 DASD Hello Everyone, I need some confirmation. I am just amazed at the performance of the DS6800 I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to another 3390-mod 9 volume on the DS6800. FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS The command responded instantaneously. SYNChronous tells CP to process the command immediately and does not allow you to enter any other commands until the hardware has accepted all parameters, all messages from the Enterprise Storage Server (ESS) subsystem have been processed, and the FLASHCOPY command completes. Is the DS6800 and the FLASHCOPY really that fast or is there something going on behind the scenes? Performance has been pretty unbelievable but the FLASHCOPY was just too fast. Example Our Batch cycle at night use to take 5-5.5 hours. Started at midnight and Completeed around 5:30 am. Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections. SWITCH to DS6800. DS6800 2 gig of cache with 4 FICON connections. Batch cycle dropped by 1 hour without any other changes. Start at midnight and completes around 4-4:30 am. Ed Martin 330-588-4723 ext 40441 - 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.
Re: FLASHCOPY performance to a DS6800 DASD
Hello Larry, I kept hearing those types of numbers. I am very pleasantly surprised. Ed Martin 330-588-4723 ext 40441 From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Macioce, Larry Sent: Wednesday, July 16, 2008 10:06 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: FLASHCOPY performance to a DS6800 DASD I can't help you with the flashcopy question, but I can tell you our dfdss full backups(3390-3) went from 20-25 min to 6-7 min when we changed out to the ds6k. No one could believe it From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Edward M. Martin Sent: Wednesday, July 16, 2008 10:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: FLASHCOPY performance to a DS6800 DASD Hello Everyone, I need some confirmation. I am just amazed at the performance of the DS6800 I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to another 3390-mod 9 volume on the DS6800. FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS The command responded instantaneously. SYNChronous tells CP to process the command immediately and does not allow you to enter any other commands until the hardware has accepted all parameters, all messages from the Enterprise Storage Server (ESS) subsystem have been processed, and the FLASHCOPY command completes. Is the DS6800 and the FLASHCOPY really that fast or is there something going on behind the scenes? Performance has been pretty unbelievable but the FLASHCOPY was just too fast. Example Our Batch cycle at night use to take 5-5.5 hours. Started at midnight and Completeed around 5:30 am. Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections. SWITCH to DS6800. DS6800 2 gig of cache with 4 FICON connections. Batch cycle dropped by 1 hour without any other changes. Start at midnight and completes around 4-4:30 am. Ed Martin 330-588-4723 ext 40441 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.
Re: FLASHCOPY performance to a DS6800 DASD
Ed, I'm sure I'll be corrected if my understanding is in error. The FLASHCOPY proceeds in the background, but the source is available for use immediately as writes to un-copied portions of the source volume are logged and held until the flashcopy completes. Also, reads of uncopied areas of the destination volume pull from the original, as yet unchanged, volume. Once the copy is complete, the logged updates are applied to the source volume. On our DS8100, we flashcopy about 60 VSE volumes each night (waiting 3 seconds between commands) and then immediately bring up our production system. We then immediately start VMBACKUP to grab a full DR copy from the destination volumes. Our production VSE is IPL'd usually within 5 minutes of shutdown. Bob _ From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Edward M. Martin Sent: Wednesday, July 16, 2008 9:17 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: FLASHCOPY performance to a DS6800 DASD Hello Larry, I kept hearing those types of numbers. I am very pleasantly surprised. Ed Martin 330-588-4723 ext 40441 _ From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Macioce, Larry Sent: Wednesday, July 16, 2008 10:06 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: FLASHCOPY performance to a DS6800 DASD I can't help you with the flashcopy question, but I can tell you our dfdss full backups(3390-3) went from 20-25 min to 6-7 min when we changed out to the ds6k. No one could believe it _ From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Edward M. Martin Sent: Wednesday, July 16, 2008 10:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: FLASHCOPY performance to a DS6800 DASD Hello Everyone, I need some confirmation. I am just amazed at the performance of the DS6800 I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to another 3390-mod 9 volume on the DS6800. FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS The command responded instantaneously. SYNChronous tells CP to process the command immediately and does not allow you to enter any other commands until the hardware has accepted all parameters, all messages from the Enterprise Storage Server (ESS) subsystem have been processed, and the FLASHCOPY command completes. Is the DS6800 and the FLASHCOPY really that fast or is there something going on behind the scenes? Performance has been pretty unbelievable but the FLASHCOPY was just too fast. Example Our Batch cycle at night use to take 5-5.5 hours. Started at midnight and Completeed around 5:30 am. Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections. SWITCH to DS6800. DS6800 2 gig of cache with 4 FICON connections. Batch cycle dropped by 1 hour without any other changes. Start at midnight and completes around 4-4:30 am. Ed Martin 330-588-4723 ext 40441 _ 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. This electronic transmission and any documents accompanying this electronic transmission contain confidential information belonging to the sender. This information may be legally privileged. The information is intended only for the use of the individual or entity named above. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or the taking of any action in reliance on or regarding the contents of this electronically transmitted information is strictly prohibited.
Re: FLASHCOPY performance to a DS6800 DASD
Hello and Thanks to everyone, I have been to the lectures and read the literature. I was just amazed at the performance. Question (because I am Systems), what happens to the copy process if power is interrupted? And how do I know when the copy function is actually completed? Ed Martin 330-588-4723 ext 40441 From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Bob Levad (641-585-6770) Sent: Wednesday, July 16, 2008 10:36 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: FLASHCOPY performance to a DS6800 DASD Ed, I'm sure I'll be corrected if my understanding is in error. The FLASHCOPY proceeds in the background, but the source is available for use immediately as writes to un-copied portions of the source volume are logged and held until the flashcopy completes. Also, reads of uncopied areas of the destination volume pull from the original, as yet unchanged, volume. Once the copy is complete, the logged updates are applied to the source volume. On our DS8100, we flashcopy about 60 VSE volumes each night (waiting 3 seconds between commands) and then immediately bring up our production system. We then immediately start VMBACKUP to grab a full DR copy from the destination volumes. Our production VSE is IPL'd usually within 5 minutes of shutdown. Bob ntents of this electronically transmitted information is strictly prohibited.
Re: FLASHCOPY performance to a DS6800 DASD
We use it for our Linux image cloning, where we copy two to three 3390 mod 9 volumes to create the new image. From request to first boot of the copied image is roughly 18 to 25 seconds. Can¹t fault that at all... -- Robert P. Nix Mayo Foundation.~. RO-OE-5-55 200 First Street SW/V\ 507-284-0844 Rochester, MN 55905 /( )\ -^^-^^ In theory, theory and practice are the same, but in practice, theory and practice are different. On 7/16/08 9:43 AM, Edward M. Martin [EMAIL PROTECTED] wrote: Hello and Thanks to everyone, I have been to the lectures and read the literature. I was just amazed at the performance. Question (because I am Systems), what happens to the copy process if power is interrupted? And how do I know when the copy function is actually completed? Ed Martin 330-588-4723 ext 40441 From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Bob Levad (641-585-6770) Sent: Wednesday, July 16, 2008 10:36 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: FLASHCOPY performance to a DS6800 DASD Ed, I'm sure I'll be corrected if my understanding is in error. The FLASHCOPY proceeds in the background, but the source is available for use immediately as writes to un-copied portions of the source volume are logged and held until the flashcopy completes. Also, reads of uncopied areas of the destination volume pull from the original, as yet unchanged, volume. Once the copy is complete, the logged updates are applied to the source volume. On our DS8100, we flashcopy about 60 VSE volumes each night (waiting 3 seconds between commands) and then immediately bring up our production system. We then immediately start VMBACKUP to grab a full DR copy from the destination volumes. Our production VSE is IPL'd usually within 5 minutes of shutdown. Bob ntents of this electronically transmitted information is strictly prohibited.
Re: FLASHCOPY performance to a DS6800 DASD
Hi Ed Yep, it is amazing, especially for those of us that never had access to a high performance dasd subsystem before. Without the sync parm, the command comes back immediately. With the sync parm, the command comes back when the DS6800 has gathered all the information/control blocks necessary, and starts the flashcopy. I've never been able to determine when a flashcopy is completed, other than looking at the lights on the box. That has been a problem as if you need to rerun the flashcopy command again (like something bombed out in the rexx exec and it is easier just to reexecute the exec), it tells you that the to volume is in use. So if you have a mixture of large and small volumes, the small volumes get a repeat of being flashed and the large volumes end up with the original flash. There is suppose to be a way from the DS6800 console to determine what flashes are running, but I never got that far. Also, if you want to flash a series of volumes at the same instant, it can be done via the DS6800 console. I flash minidisks, so I can only use the VM Flashcopy command. BTW, have you noticed that when you run batch jobs, you are always near 100% cpu utilization? My boss keeps asking me who is in a loop. We are running just fine G. Tom Duerbusch THD Consulting Law of Cat Acceleration A cat will accelerate at a constant rate, until he gets good and ready to stop. Edward M. Martin [EMAIL PROTECTED] 7/16/2008 8:59 AM Hello Everyone, I need some confirmation. I am just amazed at the performance of the DS6800 I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to another 3390-mod 9 volume on the DS6800. FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS The command responded instantaneously. SYNChronous tells CP to process the command immediately and does not allow you to enter any other commands until the hardware has accepted all parameters, all messages from the Enterprise Storage Server (ESS) subsystem have been processed, and the FLASHCOPY command completes. Is the DS6800 and the FLASHCOPY really that fast or is there something going on behind the scenes? Performance has been pretty unbelievable but the FLASHCOPY was just too fast. Example Our Batch cycle at night use to take 5-5.5 hours. Started at midnight and Completeed around 5:30 am. Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections. SWITCH to DS6800. DS6800 2 gig of cache with 4 FICON connections. Batch cycle dropped by 1 hour without any other changes. Start at midnight and completes around 4-4:30 am. Ed Martin 330-588-4723 ext 40441
Re: FLASHCOPY performance to a DS6800 DASD
Hello Tom, I have not noticed the 100 during the batch processing but I will ask the operators to keep an eye on it. Ed Martin 330-588-4723 ext 40441 -Original Message- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Tom Duerbusch Sent: Wednesday, July 16, 2008 11:26 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: FLASHCOPY performance to a DS6800 DASD Hi Ed Yep, it is amazing, especially for those of us that never had access to a high performance dasd subsystem before. Without the sync parm, the command comes back immediately. With the sync parm, the command comes back when the DS6800 has gathered all the information/control blocks necessary, and starts the flashcopy. I've never been able to determine when a flashcopy is completed, other than looking at the lights on the box. That has been a problem as if you need to rerun the flashcopy command again (like something bombed out in the rexx exec and it is easier just to reexecute the exec), it tells you that the to volume is in use. So if you have a mixture of large and small volumes, the small volumes get a repeat of being flashed and the large volumes end up with the original flash. There is suppose to be a way from the DS6800 console to determine what flashes are running, but I never got that far. Also, if you want to flash a series of volumes at the same instant, it can be done via the DS6800 console. I flash minidisks, so I can only use the VM Flashcopy command. BTW, have you noticed that when you run batch jobs, you are always near 100% cpu utilization? My boss keeps asking me who is in a loop. We are running just fine G. Tom Duerbusch THD Consulting Law of Cat Acceleration A cat will accelerate at a constant rate, until he gets good and ready to stop. Edward M. Martin [EMAIL PROTECTED] 7/16/2008 8:59 AM Hello Everyone, I need some confirmation. I am just amazed at the performance of the DS6800 I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to another 3390-mod 9 volume on the DS6800. FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS The command responded instantaneously. SYNChronous tells CP to process the command immediately and does not allow you to enter any other commands until the hardware has accepted all parameters, all messages from the Enterprise Storage Server (ESS) subsystem have been processed, and the FLASHCOPY command completes. Is the DS6800 and the FLASHCOPY really that fast or is there something going on behind the scenes? Performance has been pretty unbelievable but the FLASHCOPY was just too fast. Example Our Batch cycle at night use to take 5-5.5 hours. Started at midnight and Completeed around 5:30 am. Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections. SWITCH to DS6800. DS6800 2 gig of cache with 4 FICON connections. Batch cycle dropped by 1 hour without any other changes. Start at midnight and completes around 4-4:30 am. Ed Martin 330-588-4723 ext 40441
Re: FLASHCOPY performance to a DS6800 DASD
Check out ICKDSF's PPRCOPY command. I surely has information about pending remote copies. ICKDSF CONSOLE CONSOLE PPRCOPY QUERY UNIT(vaddr) (you need to link to a fullpack first; you can query the primary and secondary device) So, it may also return information about Flashcopy status. 2008/7/16 Tom Duerbusch [EMAIL PROTECTED]: Hi Ed Yep, it is amazing, especially for those of us that never had access to a high performance dasd subsystem before. Without the sync parm, the command comes back immediately. With the sync parm, the command comes back when the DS6800 has gathered all the information/control blocks necessary, and starts the flashcopy. I've never been able to determine when a flashcopy is completed, other than looking at the lights on the box. That has been a problem as if you need to rerun the flashcopy command again (like something bombed out in the rexx exec and it is easier just to reexecute the exec), it tells you that the to volume is in use. So if you have a mixture of large and small volumes, the small volumes get a repeat of being flashed and the large volumes end up with the original flash. There is suppose to be a way from the DS6800 console to determine what flashes are running, but I never got that far. Also, if you want to flash a series of volumes at the same instant, it can be done via the DS6800 console. I flash minidisks, so I can only use the VM Flashcopy command. BTW, have you noticed that when you run batch jobs, you are always near 100% cpu utilization? My boss keeps asking me who is in a loop. We are running just fine G. Tom Duerbusch THD Consulting Law of Cat Acceleration A cat will accelerate at a constant rate, until he gets good and ready to stop. Edward M. Martin [EMAIL PROTECTED] 7/16/2008 8:59 AM Hello Everyone, I need some confirmation. I am just amazed at the performance of the DS6800 I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to another 3390-mod 9 volume on the DS6800. FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS The command responded instantaneously. SYNChronous tells CP to process the command immediately and does not allow you to enter any other commands until the hardware has accepted all parameters, all messages from the Enterprise Storage Server (ESS) subsystem have been processed, and the FLASHCOPY command completes. Is the DS6800 and the FLASHCOPY really that fast or is there something going on behind the scenes? Performance has been pretty unbelievable but the FLASHCOPY was just too fast. Example Our Batch cycle at night use to take 5-5.5 hours. Started at midnight and Completeed around 5:30 am. Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections. SWITCH to DS6800. DS6800 2 gig of cache with 4 FICON connections. Batch cycle dropped by 1 hour without any other changes. Start at midnight and completes around 4-4:30 am. Ed Martin 330-588-4723 ext 40441 -- Kris Buelens, IBM Belgium, VM customer support
Re: FLASHCOPY performance to a DS6800 DASD
For those on z/VM 5.3.0, please check out the CP QUERY Virtual FLASHCopy command; under FLC in the online help for HELP CPQUERY VIRTUAL. especially the ACTIVE Number of active FLASHCOPY relationships output. It shows the number of copies (including background copies) currently active for the real track extents (start to end) covered by a VM minidisk on the real volume. Steve Wilkins z/VM I/O Strategy Kris Buelens [EMAIL PROTECTED] il.comTo Sent by: The IBM IBMVM@LISTSERV.UARK.EDU z/VM Operating cc System [EMAIL PROTECTED] Subject ARK.EDU Re: FLASHCOPY performance to a DS6800 DASD 07/16/2008 01:37 PM Please respond to The IBM z/VM Operating System [EMAIL PROTECTED] ARK.EDU Check out ICKDSF's PPRCOPY command. I surely has information about pending remote copies. ICKDSF CONSOLE CONSOLE PPRCOPY QUERY UNIT(vaddr) (you need to link to a fullpack first; you can query the primary and secondary device) So, it may also return information about Flashcopy status. 2008/7/16 Tom Duerbusch [EMAIL PROTECTED]: Hi Ed Yep, it is amazing, especially for those of us that never had access to a high performance dasd subsystem before. Without the sync parm, the command comes back immediately. With the sync parm, the command comes back when the DS6800 has gathered all the information/control blocks necessary, and starts the flashcopy. I've never been able to determine when a flashcopy is completed, other than looking at the lights on the box. That has been a problem as if you need to rerun the flashcopy command again (like something bombed out in the rexx exec and it is easier just to reexecute the exec), it tells you that the to volume is in use. So if you have a mixture of large and small volumes, the small volumes get a repeat of being flashed and the large volumes end up with the original flash. There is suppose to be a way from the DS6800 console to determine what flashes are running, but I never got that far. Also, if you want to flash a series of volumes at the same instant, it can be done via the DS6800 console. I flash minidisks, so I can only use the VM Flashcopy command. BTW, have you noticed that when you run batch jobs, you are always near 100% cpu utilization? My boss keeps asking me who is in a loop. We are running just fine G. Tom Duerbusch THD Consulting Law of Cat Acceleration A cat will accelerate at a constant rate, until he gets good and ready to stop. Edward M. Martin [EMAIL PROTECTED] 7/16/2008 8:59 AM Hello Everyone, I need some confirmation. I am just amazed at the performance of the DS6800 I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to another 3390-mod 9 volume on the DS6800. FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS The command responded instantaneously. SYNChronous tells CP to process the command immediately and does not allow you to enter any other commands until the hardware has accepted all parameters, all messages from the Enterprise Storage Server (ESS) subsystem have been processed, and the FLASHCOPY command completes. Is the DS6800 and the FLASHCOPY really that fast or is there something going on behind the scenes? Performance has been pretty unbelievable but the FLASHCOPY was just too fast. Example Our Batch cycle at night use to take 5-5.5 hours. Started at midnight and Completeed around 5:30 am. Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections. SWITCH to DS6800. DS6800 2 gig of cache with 4 FICON connections. Batch cycle
