Josh Berkus wrote:
> Folks,
>
> I am hoping to start a thread where users post their experiences with
> various RAID and SCSI controllers running Postgres. When completed,
> I'll post it somewhere on Techdocs with a big disclaimer. I'll start it
> off:
Sounds like a really good idea. There's already the beginnings of a page on Techdocs for this too. ;-)
Here's two thoughts that might be helpful, although they're not RAID.
Advansys UW SCSI controller: Brain damaged. Won't let standard Seagate Cheetah 10k RPM drives operating at all without
having SCSI Disconnection turned off, and speed is forced to a maximum throughput of 6MB/s. 100% not recommended.
Adaptec 29160 Ultra160 controller, BIOS version 3.10.0: Seems nice. Everything works well, most stuff is automatically
configured, supported by just about everything. Haven't done throughput benchmarks though.
Regards and best wishes,
Justin Clift
> MYLEX AcceleRAID 170: Not supported under Linux 2.4 kernels.
> Performance under RAID 5 with 3 Maxtor UW SCSI disks good on read
> operations (slightly better than a single SCSI disk) but on large write
> operations poor, similar to low-end IDE disks in having disk-acccess
> bottlenecks. Suspected in our installation of locking up on very large
> simultaneous read/write operations, such as data tranformations on
> tables over 1 million records. (cause of lockup not firmly determined
> yet). (Josh Berkus 11/2002)
>
> -Josh Berkus
--
"My grandfather once told me that there are two kinds of people: those
who work and those who take the credit. He told me to try to be in the
first group; there was less competition there."
- Indira Gandhi
