Comments on: RAID System performance surprises http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/ Everything about MySQL Performance Mon, 08 Sep 2008 04:53:02 +0000 http://wordpress.org/?v=2.5.1 By: peter http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249436 peter Thu, 06 Mar 2008 23:43:30 +0000 http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249436 Bill, It is also disabled for about an hour during charge phase - before battery gets enough charge to sustain memory contents for at least 24 hours. Bill,

It is also disabled for about an hour during charge phase - before battery gets enough charge to sustain memory contents for at least 24 hours.

]]> By: Bill http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249419 Bill Thu, 06 Mar 2008 22:27:02 +0000 http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249419 Thanks for the run through, I didn't realize the bbu ran through a discharge recharge phase. But form the doc you linked the BBU is only disabled during the discharge phase. Its enabled once the charging starts, so the performance should only be degraded for 3.5 hours or so. That should make it a little easier to schedule during non peak times. Thanks for the run through, I didn’t realize the bbu ran through a discharge recharge phase. But form the doc you linked the BBU is only disabled during the discharge phase. Its enabled once the charging starts, so the performance should only be degraded for 3.5 hours or so. That should make it a little easier to schedule during non peak times.

]]> By: Xaprb http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249082 Xaprb Wed, 05 Mar 2008 21:34:03 +0000 http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249082 Thanks. Looks like the LSI utility also has SNMP stuff. OMSA looks like a real pain to get working on non-RPM-based, non-Debian systems. (I am working with some Gentoo servers right now). The LSI utility is working OK. Thanks to both of you for the help. Thanks. Looks like the LSI utility also has SNMP stuff. OMSA looks like a real pain to get working on non-RPM-based, non-Debian systems. (I am working with some Gentoo servers right now). The LSI utility is working OK. Thanks to both of you for the help.

]]> By: Brice Figureau http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249033 Brice Figureau Wed, 05 Mar 2008 19:26:45 +0000 http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-249033 Baron, We are also using OMSA for monitoring and management, because of it's snmp itegration, but I used in the past the following two open-source software (for monitoring only): * megactl: http://sourceforge.net/projects/megactl * safte-monitor (which checks the SAF-TE compliant disk enclosure of dell servers and not the raid card direclty): http://oss.metaparadigm.com/safte-monitor/ Hope this helps, Brice Baron,

We are also using OMSA for monitoring and management, because of it’s snmp itegration, but I used in the past the following two open-source software (for monitoring only):
* megactl:
http://sourceforge.net/projects/megactl

* safte-monitor (which checks the SAF-TE compliant disk enclosure of dell servers and not the raid card direclty):
http://oss.metaparadigm.com/safte-monitor/

Hope this helps,
Brice

]]> By: peter http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-248984 peter Wed, 05 Mar 2008 17:03:54 +0000 http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-248984 Baron, For monitoring PERC I use OMSA which has Nagios plugins and it works pretty well. Here is the command which tells when next Learn cycle to be: [root@DB01 ~]# omreport storage battery controller=0 Battery 0 on Controller PERC 5/i Integrated (Embedded) Controller PERC 5/i Integrated (Slot Embedded) ID : 0 Status : Ok Name : Battery 0 State : Ready Recharge Count : Not Applicable Max Recharge Count : Not Applicable Predicted Capacity Status : Ready Learn State : Idle Next Learn Time : 4 days 4 hours Maximum Learn Delay : 7 days 0 hours The utility you mentioned is for PERC4 for PERC5 I have not found one at least a year ago, however LSI utility works pretty well instead: http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/megaraid_sas_8408e/index.html?remote=1 Baron,

For monitoring PERC I use OMSA which has Nagios plugins and it works pretty well.

Here is the command which tells when next Learn cycle to be:

[root@DB01 ~]# omreport storage battery controller=0
Battery 0 on Controller PERC 5/i Integrated (Embedded)

Controller PERC 5/i Integrated (Slot Embedded)
ID : 0
Status : Ok
Name : Battery 0
State : Ready
Recharge Count : Not Applicable
Max Recharge Count : Not Applicable
Predicted Capacity Status : Ready
Learn State : Idle
Next Learn Time : 4 days 4 hours
Maximum Learn Delay : 7 days 0 hours

The utility you mentioned is for PERC4 for PERC5 I have not found one at least a year ago, however LSI utility works pretty well instead:

http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/megaraid_sas_8408e/index.html?remote=1

]]> By: Xaprb http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-248932 Xaprb Wed, 05 Mar 2008 14:13:05 +0000 http://www.mysqlperformanceblog.com/2008/03/05/raid-system-performance-surprises/#comment-248932 Peter, how do you manage and monitor your PERC controller, control Patrol Read, etc? Do you use Dell's MegaPR utility for this? (http://support.dell.com/support/downloads/download.aspx?fileid=129694) It look like there are a lot of complaints about it crashing. Peter, how do you manage and monitor your PERC controller, control Patrol Read, etc? Do you use Dell’s MegaPR utility for this? (http://support.dell.com/support/downloads/download.aspx?fileid=129694) It look like there are a lot of complaints about it crashing.

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