[olug] Slow read speeds-SuSE

[Craig Wolf]

tsatest sees a 13%-16% error rate.  Effective rate started @6000+ but dropped to 1600+ after about 30 seconds:
                  SMS - TSA Statistical Analyzer 
Backing Up :/                                      
Read Count:         71024               Min. Read Time:     000us 
Last Read Size:     15682               Last Read Time:     500us 
Total Bytes Read:   2532135059          Max. Read Time:     208000us 
Raw Data MB/min:    2946.50             Avg. Read Time:     600us 
Backup Sets:        34158               Avg. Scan Time:     1100us     
Avg. Open Time:     000us               Total Read Time:    49s 
Avg. Close Time:    000us               Elapsed Time:       91s 
Effective MB/min:   1620.23             Total TSA Time:     90s     
                                        Max. Error:         16.14% 
                                        Avg. File Read Time:1500us     
Screenshot @5 minutes: 
                  SMS - TSA Statistical Analyzer 
Backing Up :/                                      
Read Count:         235154              Min. Read Time:     000us 
Last Read Size:     5155                Last Read Time:     000us 
Total Bytes Read:   6057201885          Max. Read Time:     208000us 
Raw Data MB/min:    1867.13             Avg. Read Time:     700us 
Backup Sets:        158121              Avg. Scan Time:     600us     
Avg. Open Time:     000us               Total Read Time:    187s 
Avg. Close Time:    000us               Elapsed Time:       302s 
Effective MB/min:   1163.43             Total TSA Time:     300s     
                                        Max. Error:         19.11% 
                                        Avg. File Read Time:1200us     




Craig Wolf
Linux Server Support
Backups Administrator
Desktop/Network Specialist
Desk: (402)715-6283
Cell: (402)510-0301



>>> Bill Brush <bbrush at gmail.com> 4/29/2010 10:41 AM >>>
We have been using OES for a while here, and we also use Commvault for
backups.  Our backup guy said to verify your TSAFS settings to make sure
they match the Commvault recommendations.  The NSS partitions will be going
through TSAFS and that can make or break your backups.

Bill

On Thu, Apr 29, 2010 at 9:35 AM, Craig Wolf <cjwolf at mpsomaha.org> wrote:

>
> SLES10/OES is accurate.  We are using CommVault for our backups and works
> fine on other servers with the OS combination, or at least have not seen
> THIS much of an issue.
>
>
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