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

Re: Tyan Thunder MB for postgres server

From: William Yu <wyu(at)talisys(dot)com>
To: pgsql-admin(at)postgresql(dot)org
Subject: Re: Tyan Thunder MB for postgres server
Date: 2004-12-15 23:29:58
Message-ID: cpqhgb$2bun$ (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
Iain wrote:
> Upon further investigation, I think this the way to go, specificaly 
> I'llbe recommending the 320-2 as I plan to put the WAL and DB on 
> seperate channels and partitions (as opposed to to putting them on the 
> same logical partition split over the two channels).

SOmething to think about. Let's suppose a channel/cable completely dies. 
How would you protect against it? Split a logical mirror device over 2 

Another trick I've started doing with my MegaRAID setups is mirroring in 
hardware but striping in software. To do 100% hardware RAID-10 MegaRAID 
cards, all drives must have the same geometry. Not a big deal when 
you're first configuring a server but a few years down the line when a 
drive dies and you need a replacement, it can drive you up the wall. I 
had a set of IBM 36GBs that needed a replacement -- couldn't find any 
old stock so I decided to get the newest IBM (Hitachi) 36GBs -- NOT THE 
SAME GEOMETRY!(at)!@!#!$##

After learning that lesson, I did some testing with mirroring. LSI is 
much less stringent for mirroring. I was able to pair a Seagate + IBM 
and still get a valid mirror drive. I then use Linux software RAID to 
stripe 2 mirror volumes together.

In response to


pgsql-admin by date

Next:From: IainDate: 2004-12-16 02:18:37
Subject: Re: Tyan Thunder MB for postgres server
Previous:From: Andrew SullivanDate: 2004-12-15 18:15:23
Subject: Re: upgrading postgresql

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group