Re: [Veritas-bu] Any ACSLS experts in the house?
I have met some of those guys from CERN at a couple of the old STK/Sun Forums. If your job involved building a supercollider, optimizing performance on a tape library is small potatoes... :-) -Original Message- From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Justin Piszcz Sent: Tuesday, February 09, 2010 5:01 PM To: David McMullin Cc: veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Any ACSLS experts in the house? On Tue, 9 Feb 2010, David McMullin wrote: Justin - You should look at your storage units and drives. I set mine up in vertical lines, do you have highly used storage units all in the top LSM? I did a Google search and found this link: https://twiki.cern.ch/twiki/bin/view/FIOgroup/FreeCellsBalancer I will just shut up and let you read this well written document. Hi David, This is an amazing paper. Thanks much. Justin. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Any ACSLS experts in the house?
Justin - You should look at your storage units and drives. I set mine up in vertical lines, do you have highly used storage units all in the top LSM? I did a Google search and found this link: https://twiki.cern.ch/twiki/bin/view/FIOgroup/FreeCellsBalancer I will just shut up and let you read this well written document. -- Message: 16 Date: Fri, 5 Feb 2010 07:17:23 -0500 (EST) From: Justin Piszcz jpis...@lucidpixels.com Subject: [Veritas-bu] Any ACSLS experts in the house? To: VERITAS-BU@MAILMAN.ENG.AUBURN.EDU Message-ID: alpine.deb.2.00.1002050713570.7...@p34.internal.lan Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Hi, I opened a case with Oracle but thought I would ask here. If you have an SL8500, it has 4 LSMs. Example: 1 (2500 slot/filled) 2 (2500 slot/filled) 3 10 tapes 4 10 tapes If you have LSMs 1,2 filled to capacity. When the robot does its audit after maintenance (opening doors) the robots in LSMs 3,4 will finish auditing quickly. Then its another ~1-1.5hrs for LSMs 1,2. If they were all equal it would cut audit times dramatically. Has anyone written a script or have documentation on balancing tapes between the LSMs? The firmware at least of 4.14 does not seem to do this for you. Justin. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Any ACSLS experts in the house?
On Tue, 9 Feb 2010, David McMullin wrote: Justin - You should look at your storage units and drives. I set mine up in vertical lines, do you have highly used storage units all in the top LSM? I did a Google search and found this link: https://twiki.cern.ch/twiki/bin/view/FIOgroup/FreeCellsBalancer I will just shut up and let you read this well written document. Hi David, This is an amazing paper. Thanks much. Justin. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Any ACSLS experts in the house?
I am in the same situation as Dean with regard to the SL8500. I seem to recall though that ACSLS takes less time for an audit if the library is put into maintenance mode using ACSLS (vary acs or lsm, diagnostic) before opening the door. I don't know whether that is feasible for you or how it will work with the SL8500, but you might want to give it a try. Best, George Herbert Basline Storage Engineer - Backup SunTrust Banks, Inc. Live Solid. Bank Solid. From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Dean Sent: Sunday, February 07, 2010 12:01 AM To: Justin Piszcz; veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Any ACSLS experts in the house? Jeez, I haven't worked with a SL8500 - just the old 9310s, but I understand the differences. Does it really take up to 1.5 hours to audit an LSM? Jeepers! I currently work with a couple of fully loaded ~2000 slot IBM TS3500s (or whatever the latest designation is), and I'm sure a full physical inventory doesn't take more than 20 minutes. The only have one gripper too. I've stood there several times and watched the whole process through the glass panel and I'm quite sure I couldn't have stood there for 1.5 hours. My attention span is not that long. I can't help with a script or anything to automate what you want to do. But you might also want to consider how doing this might affect mount times, if that's important to you. Depending on which LSM(s) your drives are in, doing this might cause a lot more pass-thrus; the process where a tape gets passed from one LSM to another. It was a fairly slow operation, although I'm sure it's been improved since the 9310 days. But I guess you might have to weigh up what is more important to you? The time it takes to do a physical inventory, or your average mount time. Just some thoughts :) Cheers Dean On Fri, Feb 5, 2010 at 11:17 PM, Justin Piszcz jpis...@lucidpixels.com wrote: Hi, I opened a case with Oracle but thought I would ask here. If you have an SL8500, it has 4 LSMs. Example: 1 (2500 slot/filled) 2 (2500 slot/filled) 3 10 tapes 4 10 tapes If you have LSMs 1,2 filled to capacity. When the robot does its audit after maintenance (opening doors) the robots in LSMs 3,4 will finish auditing quickly. Then its another ~1-1.5hrs for LSMs 1,2. If they were all equal it would cut audit times dramatically. Has anyone written a script or have documentation on balancing tapes between the LSMs? The firmware at least of 4.14 does not seem to do this for you. Justin. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu 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 is a federally registered service mark of SunTrust Banks, Inc. Live Solid. Bank Solid. is a service mark of SunTrust Banks, Inc. [ST:XCL] ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Any ACSLS experts in the house?
I can see an audit taking that long if there is considerable NBU/other activity during the audit. We only have 3000 slots active for our SL8500, and when there is other activity other than the audit, the robot stops what it is doing, grabs a tape and mounts/unmounts it, and then gets back to its audit. We have our tapes distributed well enough, and the audit takes no more than 25 minutes, when there is no activity. Herbert.George george.herb...@suntrust.com Sent by: veritas-bu-boun...@mailman.eng.auburn.edu 02/08/2010 12:02 PM To Dean dean.de...@gmail.com, Justin Piszcz jpis...@lucidpixels.com, veritas-bu@mailman.eng.auburn.edu cc Subject Re: [Veritas-bu] Any ACSLS experts in the house? I am in the same situation as Dean with regard to the SL8500. I seem to recall though that ACSLS takes less time for an audit if the library is put into maintenance mode using ACSLS (vary acs or lsm, diagnostic) before opening the door. I don’t know whether that is feasible for you or how it will work with the SL8500, but you might want to give it a try. Best, George Herbert Basline Storage Engineer - Backup SunTrust Banks, Inc. Live Solid. Bank Solid. From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Dean Sent: Sunday, February 07, 2010 12:01 AM To: Justin Piszcz; veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Any ACSLS experts in the house? Jeez, I haven't worked with a SL8500 - just the old 9310s, but I understand the differences. Does it really take up to 1.5 hours to audit an LSM? Jeepers! I currently work with a couple of fully loaded ~2000 slot IBM TS3500s (or whatever the latest designation is), and I'm sure a full physical inventory doesn't take more than 20 minutes. The only have one gripper too. I've stood there several times and watched the whole process through the glass panel and I'm quite sure I couldn't have stood there for 1.5 hours. My attention span is not that long. I can't help with a script or anything to automate what you want to do. But you might also want to consider how doing this might affect mount times, if that's important to you. Depending on which LSM(s) your drives are in, doing this might cause a lot more pass-thrus; the process where a tape gets passed from one LSM to another. It was a fairly slow operation, although I'm sure it's been improved since the 9310 days. But I guess you might have to weigh up what is more important to you? The time it takes to do a physical inventory, or your average mount time. Just some thoughts :) Cheers Dean On Fri, Feb 5, 2010 at 11:17 PM, Justin Piszcz jpis...@lucidpixels.com wrote: Hi, I opened a case with Oracle but thought I would ask here. If you have an SL8500, it has 4 LSMs. Example: 1 (2500 slot/filled) 2 (2500 slot/filled) 3 10 tapes 4 10 tapes If you have LSMs 1,2 filled to capacity. When the robot does its audit after maintenance (opening doors) the robots in LSMs 3,4 will finish auditing quickly. Then its another ~1-1.5hrs for LSMs 1,2. If they were all equal it would cut audit times dramatically. Has anyone written a script or have documentation on balancing tapes between the LSMs? The firmware at least of 4.14 does not seem to do this for you. Justin. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu 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 is a federally registered service mark of SunTrust Banks, Inc. Live Solid. Bank Solid. is a service mark of SunTrust Banks, Inc. [ST:XCL] ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu PLEASE NOTE: The preceding information may be confidential or privileged. It only should be used or disseminated for the purpose of conducting business with Parker. If you are not an intended recipient, please notify the sender by replying to this message and then delete the information from your system. Thank you for your cooperation. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Any ACSLS experts in the house?
The move command can be used to move tapes between LSMs. Regarding long audit times: It is usually best to distribute both transports (drives) and tapes equally across LSMs to minimize this effect, as well as for performance reasons. Tapes will eventually end up closer to their drives anyway following dismount operations if the default Float behaviour is not turned off, but that takes a long time to achieve. Regarding the speedup if in maintenance mode, per the ACSLS ICAG: The difference between online and diagnostic states is: an audit in diagnostic state can only be performed through the cmd_proc. Client requests are rejected while the LSM is in the diagnostic state. This state is faster because the audit now has exclusive run of the library without competing mount/dismount requests that could otherwise be submitted from the client. Scripting/Automating ACSLS commands (like move) is also possible. Best Regards, Steve Stephen Lavin Green Oak Systems, LLC st...@greenoaksystems.com http://www.greenoaksystems.com ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Any ACSLS experts in the house?
On Sun, 7 Feb 2010, Dean wrote: Jeez, I haven't worked with a SL8500 - just the old 9310s, but I understand the differences. Does it really take up to 1.5 hours to audit an LSM? Jeepers! I currently work with a couple of fully loaded ~2000 slot IBM TS3500s (or whatever the latest designation is), and I'm sure a full physical inventory doesn't take more than 20 minutes. The only have one gripper too. I've stood there several times and watched the whole process through the glass panel and I'm quite sure I couldn't have stood there for 1.5 hours. My attention span is not that long. I can't help with a script or anything to automate what you want to do. But you might also want to consider how doing this might affect mount times, if that's important to you. Depending on which LSM(s) your drives are in, doing this might cause a lot more pass-thrus; the process where a tape gets passed from one LSM to another. It was a fairly slow operation, although I'm sure it's been improved since the 9310 days. But I guess you might have to weigh up what is more important to you? The time it takes to do a physical inventory, or your average mount time. Hi Dean, Yes, very good points, I would need to make sure only scratch tapes were moved to the bottom LSMs to avoid what you noted. Yes, at least with the older firmware (3.98b), at 4.14 now the top two LSMs took much longer (~45-90min longer than the bottom two LSMs) I suppose another way to look at it is when its completely filled, it won't matter anymore; however, until that occurs it would still be nice to keep everything balanced. Thanks for the notes/information! Justin. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
Re: [Veritas-bu] Any ACSLS experts in the house?
Jeez, I haven't worked with a SL8500 - just the old 9310s, but I understand the differences. Does it really take up to 1.5 hours to audit an LSM? Jeepers! I currently work with a couple of fully loaded ~2000 slot IBM TS3500s (or whatever the latest designation is), and I'm sure a full physical inventory doesn't take more than 20 minutes. The only have one gripper too. I've stood there several times and watched the whole process through the glass panel and I'm quite sure I couldn't have stood there for 1.5 hours. My attention span is not that long. I can't help with a script or anything to automate what you want to do. But you might also want to consider how doing this might affect mount times, if that's important to you. Depending on which LSM(s) your drives are in, doing this might cause a lot more pass-thrus; the process where a tape gets passed from one LSM to another. It was a fairly slow operation, although I'm sure it's been improved since the 9310 days. But I guess you might have to weigh up what is more important to you? The time it takes to do a physical inventory, or your average mount time. Just some thoughts :) Cheers Dean On Fri, Feb 5, 2010 at 11:17 PM, Justin Piszcz jpis...@lucidpixels.comwrote: Hi, I opened a case with Oracle but thought I would ask here. If you have an SL8500, it has 4 LSMs. Example: 1 (2500 slot/filled) 2 (2500 slot/filled) 3 10 tapes 4 10 tapes If you have LSMs 1,2 filled to capacity. When the robot does its audit after maintenance (opening doors) the robots in LSMs 3,4 will finish auditing quickly. Then its another ~1-1.5hrs for LSMs 1,2. If they were all equal it would cut audit times dramatically. Has anyone written a script or have documentation on balancing tapes between the LSMs? The firmware at least of 4.14 does not seem to do this for you. Justin. ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu ___ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
