Tsm server possibly limiting backup performance
Tsm server 6.2.2 OS redhat enterprise linux 6.0 Client tdp for exchange, sqlserver, and backup archive client Client connected via 1 gb ethernet connection. In my experience, I yhave never been able to se throughput of much more than 200 mb/s during a tsm backup, whether tdp or regular client. I wonder, is TSM limiting a single session's bandwidth so as to insure availability for other client sessions which might begin; i.e. prevent one backup stream from monopolizing the server's network connection? I have run ftp and other tests to the server, and achieved throughput of around 800 mb/s over the same connection. Gary Lee Senior System Programmer Ball State University phone: 765-285-1310
Re: Tsm server possibly limiting backup performance
A little more explanation is going to be needed. A 1GB ethernet is not going to give 800mb/s, let alone 200mb/s. 1GB ethernet is only going to provide one direction throughput of 110mb/s. Do you mean a 10gb ethernet connection? From: Lee, Gary D. g...@bsu.edu To: ADSM-L@VM.MARIST.EDU Date: 05/27/2011 09:35 AM Subject:Tsm server possibly limiting backup performance Sent by:ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU Tsm server 6.2.2 OS redhat enterprise linux 6.0 Client tdp for exchange, sqlserver, and backup archive client Client connected via 1 gb ethernet connection. In my experience, I yhave never been able to se throughput of much more than 200 mb/s during a tsm backup, whether tdp or regular client. I wonder, is TSM limiting a single session's bandwidth so as to insure availability for other client sessions which might begin; i.e. prevent one backup stream from monopolizing the server's network connection? I have run ftp and other tests to the server, and achieved throughput of around 800 mb/s over the same connection. Gary Lee Senior System Programmer Ball State University phone: 765-285-1310 - The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message.
Re: Tsm server possibly limiting backup performance
To make sure we're all talking the same language here, can we agree that 'b' means 'bit' and 'B' means 'byte'? This conversation could get very confusing otherwise... /DMc On 27 May 2011, at 15:09, Richard Rhodes rrho...@firstenergycorp.com wrote: A little more explanation is going to be needed. A 1GB ethernet is not going to give 800mb/s, let alone 200mb/s. 1GB ethernet is only going to provide one direction throughput of 110mb/s. Do you mean a 10gb ethernet connection? From: Lee, Gary D. g...@bsu.edu To: ADSM-L@VM.MARIST.EDU Date: 05/27/2011 09:35 AM Subject:Tsm server possibly limiting backup performance Sent by:ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU Tsm server 6.2.2 OS redhat enterprise linux 6.0 Client tdp for exchange, sqlserver, and backup archive client Client connected via 1 gb ethernet connection. In my experience, I yhave never been able to se throughput of much more than 200 mb/s during a tsm backup, whether tdp or regular client. I wonder, is TSM limiting a single session's bandwidth so as to insure availability for other client sessions which might begin; i.e. prevent one backup stream from monopolizing the server's network connection? I have run ftp and other tests to the server, and achieved throughput of around 800 mb/s over the same connection. Gary Lee Senior System Programmer Ball State University phone: 765-285-1310 - The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message.
Re: Tsm server possibly limiting backup performance
I think clarification is needed on mb/s vs. MB/s. a 1gb (gigabit) (note lowercase) connection will certainly do 800 mb/s (megabit/s). it won't, however, do 800 MB/s (megabyte/s) Paul On Fri, May 27, 2011 at 8:09 AM, Richard Rhodes rrho...@firstenergycorp.com wrote: A little more explanation is going to be needed. A 1GB ethernet is not going to give 800mb/s, let alone 200mb/s. 1GB ethernet is only going to provide one direction throughput of 110mb/s. Do you mean a 10gb ethernet connection? From: Lee, Gary D. g...@bsu.edu To: ADSM-L@VM.MARIST.EDU Date: 05/27/2011 09:35 AM Subject:Tsm server possibly limiting backup performance Sent by:ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU Tsm server 6.2.2 OS redhat enterprise linux 6.0 Client tdp for exchange, sqlserver, and backup archive client Client connected via 1 gb ethernet connection. In my experience, I yhave never been able to se throughput of much more than 200 mb/s during a tsm backup, whether tdp or regular client. I wonder, is TSM limiting a single session's bandwidth so as to insure availability for other client sessions which might begin; i.e. prevent one backup stream from monopolizing the server's network connection? I have run ftp and other tests to the server, and achieved throughput of around 800 mb/s over the same connection. Gary Lee Senior System Programmer Ball State University phone: 765-285-1310 - The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message.
Re: Tsm server possibly limiting backup performance
Sorry, thought I had my cases correct. 1 gb (gigabit) ethernet ocnnection. Ftp and other tests yielded 800 megabit performance, Tsm sessions average 200 to 250 megabit. Gary Lee Senior System Programmer Ball State University phone: 765-285-1310 -Original Message- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Paul Fielding Sent: Friday, May 27, 2011 10:30 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Tsm server possibly limiting backup performance I think clarification is needed on mb/s vs. MB/s. a 1gb (gigabit) (note lowercase) connection will certainly do 800 mb/s (megabit/s). it won't, however, do 800 MB/s (megabyte/s) Paul On Fri, May 27, 2011 at 8:09 AM, Richard Rhodes rrho...@firstenergycorp.com wrote: A little more explanation is going to be needed. A 1GB ethernet is not going to give 800mb/s, let alone 200mb/s. 1GB ethernet is only going to provide one direction throughput of 110mb/s. Do you mean a 10gb ethernet connection? From: Lee, Gary D. g...@bsu.edu To: ADSM-L@VM.MARIST.EDU Date: 05/27/2011 09:35 AM Subject:Tsm server possibly limiting backup performance Sent by:ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU Tsm server 6.2.2 OS redhat enterprise linux 6.0 Client tdp for exchange, sqlserver, and backup archive client Client connected via 1 gb ethernet connection. In my experience, I yhave never been able to se throughput of much more than 200 mb/s during a tsm backup, whether tdp or regular client. I wonder, is TSM limiting a single session's bandwidth so as to insure availability for other client sessions which might begin; i.e. prevent one backup stream from monopolizing the server's network connection? I have run ftp and other tests to the server, and achieved throughput of around 800 mb/s over the same connection. Gary Lee Senior System Programmer Ball State University phone: 765-285-1310 - The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message.
Re: Tsm server possibly limiting backup performance
The networking itself is just one element in the overall backup operation... You don't say what measurement point you are looking at for your throughput numbers. If it is the Network data transfer rate TSM summary statistic, that reflects TSM interacting with the network layer of the operating system, with affecters such as TSM TCPWindowsize, Path MTU Discovery where that is in effect, etc. Unexpected, elongated network routing can delay things; but your FTP test should have run into that if were a factor...unless conditions are changing depending upon time of day. When a TDP is involved, it can only pass data as fast as the back end application provides it. A traditional B/A backup can be impaired by the paging incited by the amount of memory taken by the Active files list. If standard measurement points don't reveal a cause, a client trace with a representative data set can be illuminating. Richard Sims
