On Mon, 12 May 2008 22:04:03 -0400 Francisco Reyes <lists@xxxxxxxxxxxxxxxx> wrote: > Inheritted a number of servers and I am starting to look into the > hardware. > > So far what I know from a few of the servers > Redhat servers. > 15K rpm disks, 12GB to 32GB of RAM. > Adaptec 2120 SCSI controller (64MB of cache). > > The servers have mostly have 12 drives in RAID 10. > We are going to redo one machine to compare RAID 10 vs RAID 50. > Mostly to see if the perfomance is close, the space gain may be > usefull. Most likely you have a scsi onboard as well I am guessing. You shouldn't bother with the 2120. My tests show it is a horrible controller for random writes. Comparing software raid on an LSI onboard for an IBM 345 versus a 2120s using hardware raid 10, the software raid completely blew the adaptec away. Joshua D. Drake -- The PostgreSQL Company since 1997: http://www.commandprompt.com/ PostgreSQL Community Conference: http://www.postgresqlconference.org/ United States PostgreSQL Association: http://www.postgresql.us/ Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate
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