Re: 6 SCSI Disks RAID 10 x 2 SCSI DISKS RAID1 + 4 SCSI Disks RAID 10

I think it's better to put all disk in a RAID10. Your max throughput with 6 disks will be a 50% better that with 4 disks, and operating system once booted, does not have to read/write but a few times.

I would divide RAID volume in several partitions: at least, operating system (/), swap and database (/srv/database) and better another for homes (/homes). Optionally, another one for logfiles (/var/log).

That's my suggestion.  Perhaps somebody has another point of view, but I prefer to rely in RAID controller and not in putting database stuff in separated disks.

-----Original Message-----
From: Renato Oliveira <renato.oliveira@grant.co.uk>
To: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: [ADMIN] 6 SCSI Disks RAID 10 x 2 SCSI DISKS RAID1 + 4 SCSI Disks RAID 10
Date: Thu, 6 May 2010 14:10:49 +0100

Good afternoon Guys,

 

I have been reading about RAID for PostgreSQL and some suggestions are:

 

6 SCSI Disks RAID10 for OS and DB

Or

2 SCSI Disks RAID 1 for OS + 4 SCSI RAID 10 for DB

 

I know the more spindles you have the better, but if you are going to be reading and writing to the same volume with a single controller, how good that will be?

 

How do you guys have  your RAIDS setup?

 

Thank you

 

Renato

 

 

 

 


  Renato Oliveira
Systems Administrator
e-mail: renato.oliveira@grant.co.uk   Tel: +44 (0)1763 260811
Fax: +44 (0)1763 262410
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