Ang: [ADSM-L] AIXASYNCIO
Hi We have a site backing up 20-25TB of data every night spread across 3 different instances running in 2 clusters. We use AIXASYNCIO on all of these server and it's certainly an I/O increase. If you're gonna use it, make sure you increase the number of AIO servers. You will notice abit more memory being used due to the use of ASYNC I/O, but it's well worth the memory. If you're using SAN volumes, other things to look at is increasing the queue_depth of your hdisks (default is usually to low). If you're using RAW devices for storagepools, you should also look at lowering the filesystem cache, since there's no really point in caching the database volumes, and RAW devices arent handled by the filesystem cache. Best Regards Daniel Sparrman Daniel Sparrman Exist i Stockholm AB Växel: 08-754 98 00 Fax: 08-754 97 30 daniel.sparr...@exist.se http://www.existgruppen.se Posthusgatan 1 761 30 NORRTÄLJE -"ADSM: Dist Stor Manager" skrev: - Till: ADSM-L@VM.MARIST.EDU Från: "Pagnotta, Pam (CONTR)" Sänt av: "ADSM: Dist Stor Manager" Datum: 09/27/2011 01:27 Ärende: [ADSM-L] AIXASYNCIO Hello, Anyone with experience with using the AIXASYNCIO server parameter on a version 6.2** TSM server running on an AIX v6.1 OS? We backup approximately 5TB of data nightly and although the performance is not bad, if this would make it better, we might have more time for administrative work. Just looking for some opinions from all the wonderful experience out there. Thank you, Pam Pam Pagnotta Sr. Systems Engineer Energy Enterprise Solutions (EES), LLC Supporting IM-621.1, Enterprise Service Center East Contractor to the U.S. Department of Energy Office: 301-903-5508 Email: pam.pagno...@hq.doe.gov Location: USA (EST/EDT)
AIXASYNCIO
Hello, Anyone with experience with using the AIXASYNCIO server parameter on a version 6.2** TSM server running on an AIX v6.1 OS? We backup approximately 5TB of data nightly and although the performance is not bad, if this would make it better, we might have more time for administrative work. Just looking for some opinions from all the wonderful experience out there. Thank you, Pam Pam Pagnotta Sr. Systems Engineer Energy Enterprise Solutions (EES), LLC Supporting IM-621.1, Enterprise Service Center East Contractor to the U.S. Department of Energy Office: 301-903-5508 Email: pam.pagno...@hq.doe.gov Location: USA (EST/EDT)
Re: AIXASYNCIO
Hi Dave,
There seems to be some contradicting info -- DIRECTIO in Tech. Guide says
what you say applies to ASYNCIO; yet, in the Admin. Ref., it states no such
limitations. Then, for ASYNCIO, there's alot of verbiage about how to
configure, and no such stated limitations in either the Tech. Guide or Admin
Ref... Also, DIRECTIO is enabled, by default (I can vouch for that, at least
if you can believe the message on the server console at TSM startup time).
Can you please confirm which limits apply to which new option?!?
Don France
Technical Architect -- Tivoli Certified Consultant
Tivoli Storage Manager, WinNT/2K, AIX/Unix, OS/390
San Jose, Ca
(408) 257-3037
mailto:[EMAIL PROTECTED] (change aye to a for replies)
Professional Association of Contract Employees
(P.A.C.E. -- www.pacepros.com)
-Original Message-
From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of
Dave Canan
Sent: Tuesday, December 03, 2002 12:31 AM
To: [EMAIL PROTECTED]
Subject: Re: AIXASYNCIO
A few additional comments I would like to add:
1. AIXASYNCIO only works with JFS filespaces with ITSM.
2. It only works with storage pool volumes (not the database and
recovery log).
3. It only works with storage pool volumes that are < 2GB in size,
and have not been created with large file enabled.
I would also be interested in any performance numbers you generate through
your testing - could you please share them with the rest of the listserv
group?
At 09:28 PM 12/2/2002 -0600, you wrote:
>Edgardo Moso wrote:
>
>>Any input about this server option ASYNCIO?
>>
>>Thanks,
>>
>>Ed Moso
>>
>Ed,
>
>This allows ITSM to take advantage of AIX's Asyncronous I/O(AIO)
>capabilities. I have not used this in an ITSM setting as of yet.
>However, I have used AIO in other places. There are several things
>required in order to use this. You must first configure and enable AIO.
>You can do this thru "smitty aio". There are only a few attributes to
>set. Here are some good starting points (remember your mileage may
>vary) set minservers=<# of CPUs in the box>, maxservers=<5 to 10 times #
>of CPUs>, maxrequests=<4096x# CPUs>, do not change server priority
>(kprocprio), state at restart to available, leave fast path enabled.
>Once that is done you will need to reboot in order for it to take
>effect. AIO requires that the application be written to use it,
>apparently ITSM server code has been updated to do so when the
>"AIXASYNCIO YES" is set in dsmserv.opt file of course the server will
>need to be restarted to pick up that change.
>
>Then make some measurements and see if things are running better. Of
>course this assumes you have some measurements prior to this to compare
>them. This has the potential for substantial I/O performance increases.
>I would be very interested in your results. In fact, I would be
>willing to help you do some before and after measurements as well as
>doing some of the data analysis to determine some additional tuning.
>And when we are done we could post on this list for others to consider.
>If you are interested please write me off the list and we can work it out.
>
>Whatever you decide (with or without my help) please let us know how
>this turns out. I think there are several people on this list who would
>be very interested.
>
>--
>Regards,
>Mark D. Rodriguez
>President MDR Consulting, Inc.
>
>===
>MDR Consulting
>The very best in Technical Training and Consulting.
>IBM Advanced Business Partner
>SAIR Linux and GNU Authorized Center for Education
>IBM Certified Advanced Technical Expert, CATE
>AIX Support and Performance Tuning, RS6000 SP, TSM/ADSM and Linux
>Red Hat Certified Engineer, RHCE
>===
Dave Canan
IBM Advanced Technical Support
[EMAIL PROTECTED]
Re: AIXASYNCIO
A few additional comments I would like to add: 1. AIXASYNCIO only works with JFS filespaces with ITSM. 2. It only works with storage pool volumes (not the database and recovery log). 3. It only works with storage pool volumes that are < 2GB in size, and have not been created with large file enabled. I would also be interested in any performance numbers you generate through your testing - could you please share them with the rest of the listserv group? At 09:28 PM 12/2/2002 -0600, you wrote: Edgardo Moso wrote: Any input about this server option ASYNCIO? Thanks, Ed Moso Ed, This allows ITSM to take advantage of AIX's Asyncronous I/O(AIO) capabilities. I have not used this in an ITSM setting as of yet. However, I have used AIO in other places. There are several things required in order to use this. You must first configure and enable AIO. You can do this thru "smitty aio". There are only a few attributes to set. Here are some good starting points (remember your mileage may vary) set minservers=<# of CPUs in the box>, maxservers=<5 to 10 times # of CPUs>, maxrequests=<4096x# CPUs>, do not change server priority (kprocprio), state at restart to available, leave fast path enabled. Once that is done you will need to reboot in order for it to take effect. AIO requires that the application be written to use it, apparently ITSM server code has been updated to do so when the "AIXASYNCIO YES" is set in dsmserv.opt file of course the server will need to be restarted to pick up that change. Then make some measurements and see if things are running better. Of course this assumes you have some measurements prior to this to compare them. This has the potential for substantial I/O performance increases. I would be very interested in your results. In fact, I would be willing to help you do some before and after measurements as well as doing some of the data analysis to determine some additional tuning. And when we are done we could post on this list for others to consider. If you are interested please write me off the list and we can work it out. Whatever you decide (with or without my help) please let us know how this turns out. I think there are several people on this list who would be very interested. -- Regards, Mark D. Rodriguez President MDR Consulting, Inc. === MDR Consulting The very best in Technical Training and Consulting. IBM Advanced Business Partner SAIR Linux and GNU Authorized Center for Education IBM Certified Advanced Technical Expert, CATE AIX Support and Performance Tuning, RS6000 SP, TSM/ADSM and Linux Red Hat Certified Engineer, RHCE === Dave Canan IBM Advanced Technical Support [EMAIL PROTECTED]
Re: AIXASYNCIO
Edgardo Moso wrote: Any input about this server option ASYNCIO? Thanks, Ed Moso Ed, This allows ITSM to take advantage of AIX's Asyncronous I/O(AIO) capabilities. I have not used this in an ITSM setting as of yet. However, I have used AIO in other places. There are several things required in order to use this. You must first configure and enable AIO. You can do this thru "smitty aio". There are only a few attributes to set. Here are some good starting points (remember your mileage may vary) set minservers=<# of CPUs in the box>, maxservers=<5 to 10 times # of CPUs>, maxrequests=<4096x# CPUs>, do not change server priority (kprocprio), state at restart to available, leave fast path enabled. Once that is done you will need to reboot in order for it to take effect. AIO requires that the application be written to use it, apparently ITSM server code has been updated to do so when the "AIXASYNCIO YES" is set in dsmserv.opt file of course the server will need to be restarted to pick up that change. Then make some measurements and see if things are running better. Of course this assumes you have some measurements prior to this to compare them. This has the potential for substantial I/O performance increases. I would be very interested in your results. In fact, I would be willing to help you do some before and after measurements as well as doing some of the data analysis to determine some additional tuning. And when we are done we could post on this list for others to consider. If you are interested please write me off the list and we can work it out. Whatever you decide (with or without my help) please let us know how this turns out. I think there are several people on this list who would be very interested. -- Regards, Mark D. Rodriguez President MDR Consulting, Inc. === MDR Consulting The very best in Technical Training and Consulting. IBM Advanced Business Partner SAIR Linux and GNU Authorized Center for Education IBM Certified Advanced Technical Expert, CATE AIX Support and Performance Tuning, RS6000 SP, TSM/ADSM and Linux Red Hat Certified Engineer, RHCE ===
AIXASYNCIO
Any input about this server option ASYNCIO? Thanks, Ed Moso
