[DRBD-user] The need for speed
philipp.reisner at linbit.com
Mon Nov 22 10:16:34 CET 2004
On Friday 19 November 2004 14:42, Jan Bruvoll wrote:
> Hi there,
> I find your comment about S-ATA RAID controllers highly interesting - I
> am struggling bigtime with getting anywhere near reasonable speeds using
> a NFS - DRDB - 3Ware RAID chain. What do you mean exactly with "slow",
> and would you be able to share any pointers on how to pinpoint why my
> server pair is so painfully slow?
This "plain motherboard IDE controler" gives me 40MB/sec with this
particular Seagate disk.
I have seen IBM's ServRaid controlers giving me no more than 30MB/sec
with a bunch of expensive SCSI disks.
I have seen 3ware controlers staying below the 30M/sec mark....
But do not ask me details, I can not rememer... and please understand
that comment in the context of an linear access pattern. A ServRaid
controler with battery backed up RAM can vastly improve the throuhgput
of transaction orientated IO load [database...].
: Dipl-Ing Philipp Reisner Tel +43-1-8178292-50 :
: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :
: Schönbrunnerstr 244, 1120 Vienna, Austria http://www.linbit.com :
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