Skip site navigation (1) Skip section navigation (2)

Re: 3ware vs. MegaRAID

From: Matteo Beccati <php(at)beccati(dot)com>
To: Greg Smith <greg(at)2ndquadrant(dot)com>
Cc: Ireneusz Pluta <ipluta(at)wp(dot)pl>, pgsql-performance(at)postgresql(dot)org
Subject: Re: 3ware vs. MegaRAID
Date: 2010-03-31 12:43:18
Message-ID: 4BB34366.2050606@beccati.com (view raw or flat)
Thread:
Lists: pgsql-performance
On 30/03/2010 19:18, Greg Smith wrote:
> The MegaRAID SAS 84* cards have worked extremely well for me in terms of
> performance and features for all the systems I've seen them installed
> in. I'd consider it a modest upgrade from that 3ware card, speed wise.
> The main issue with the MegaRAID cards is that you will have to write a
> lot of your own custom scripts to monitor for failures using their
> painful MegaCLI utility, and under FreeBSD that also requires using
> their Linux utility via emulation:
> http://www.freebsdsoftware.org/sysutils/linux-megacli.html

Getting MegaCLI to work was a slight PITA, but once it was running it's 
been just a matter of adding:

daily_status_mfi_raid_enable="YES"

to /etc/periodic.conf to get the following data in the daily reports:

Adpater: 0
------------------------------------------------------------------------
Physical Drive Information:
ENC SLO DEV SEQ MEC OEC PFC LPF STATE
1   0   0   2   0   0   0   0   Online
1   1   1   2   0   0   0   0   Online
1   2   2   2   0   0   0   0   Online
1   3   3   2   0   0   0   0   Online
1   4   4   2   0   0   0   0   Online
1   5   5   2   0   0   0   0   Online
1   255 248 0   0   0   0   0   Unconfigured(good)

Virtual Drive Information:
VD  DRV RLP RLS RLQ STS    SIZE        STATE         NAME
0   2   1   0   0   64kB   69472MB     Optimal
1   2   1   3   0   64kB   138944MB    Optimal

BBU Information:
TYPE TEMP OK   RSOC  ASOC  RC   CC    ME
iTBBU 29 C -1   94    93    816   109   2

Controller Logs:


+++ /var/log/mfi_raid_0.today	Sun Mar 28 03:07:36 2010
@@ -37797,3 +37797,25 @@
  Event Description: Patrol Read complete
  Event Data:
  	None
+
+========================================================================
+seqNum: 0x000036f6
+Time: Sat Mar 27 03:00:00 2010
+
+Code: 0x00000027
+Class: 0
+Locale: 0x20
+Event Description: Patrol Read started
+Event Data:
+	None

etc...


Cheers
-- 
Matteo Beccati

Development & Consulting - http://www.beccati.com/

In response to

pgsql-performance by date

Next:From: Bruce MomjianDate: 2010-03-31 14:23:29
Subject: Re: mysql to postgresql, performance questions
Previous:From: Faheem MithaDate: 2010-03-31 10:10:45
Subject: Re: experiments in query optimization

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group