Re: RAID + PostgreSQL?

I have here HP DL 380 G3 und HP DL 380 G4. (here Smart Array 5i and Smart
Array 6i)
Maybe there are problems with old linux kernel (but as far as i know >
2.4.27)
I dont know about such performance problems, maybe the conrollers are faster
under windows.

The battery backup write cache are very import for inserts.

You should use for performance test with dd under linux larger blocksizes,
but you should compare postgresql under linux and windows (selects, update,
inserts, etc.)

Greetings,

-Franz

-----Ursprüngliche Nachricht-----
Von: Bruno Almeida do Lago [mailto:teolupus@gmail.com]
Gesendet: Dienstag, 27. Juni 2006 14:28
An: Franz.Rasper@izb.de
Betreff: RE: [GENERAL] RAID + PostgreSQL?


I've heard from other lists that Compaq Smart Array controllers are slower
under Linux.

I could test this since I've some DL380 available with Linux and Windows.

For Linux I could use dd, but I wonder what can be used with Windows so we
could compare the results?

Best Regards,
   Bruno

________________________________________
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of Franz.Rasper@izb.de
Sent: Tuesday, June 27, 2006 4:00 AM
To: armtuk@gmail.com
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] RAID + PostgreSQL?

I have here an Smart Array 6i with 192 MB Battery Backup Write Cache with
several 146 MB U320 SCSI HDs
and I get read/write speed till 120 MB per secound (HP ProLiant DL 380G4)
under Debian Linux with
Kernel 2.4.32 an Postgresql 7.4.13.
 
Greetings,
 
-Franz