Multiple disks: RAID 5 or PG Cluster

Hi,


We are looking to build a new machine for a big PG database.

We were wondering if a machine with 5 scsi-disks would perform better
if we use a hardware raid 5 controller or if we would go for the
clustering in PG.

If we cluster in PG, do we have redundancy on the data like in a RAID
5 ?


First concern is performance, not redundancy (we can do that a
different way because all data comes from upload files)


Met vriendelijke groeten,

Bien à vous,

Kind regards,


Yves Vindevogel

Implements



Hi,

We are looking to build a new machine for a big PG database.
We were wondering if a machine with 5 scsi-disks would perform better 
if we use a hardware raid 5 controller or if we would go for the 
clustering in PG.
If we cluster in PG, do we have redundancy on the data like in a RAID 5 
?

First concern is performance, not redundancy (we can do that a 
different way because all data comes from upload files)

Met vriendelijke groeten,
Bien à vous,
Kind regards,

Yves Vindevogel
Implements




Mail: yves.vindevogel@implements.be  - Mobile: +32 (478) 80 82 91


Kempische Steenweg 206 - 3500 Hasselt - Tel-Fax: +32 (11) 43 55 76


Web: http://www.implements.be



First they ignore you.  Then they laugh at you.  Then they fight you. 
Then you win.

Mahatma Ghandi.


Mail: yves.vindevogel@implements.be  - Mobile: +32 (478) 80 82 91

Kempische Steenweg 206 - 3500 Hasselt - Tel-Fax: +32 (11) 43 55 76

Web: http://www.implements.be

First they ignore you.  Then they laugh at you.  Then they fight you.  
Then you win.
Mahatma Ghandi.