BS"D
Thank you to all the respondents.
Some comments:
1. Some believe that the write performance in RAID 5 is only as good
as performance to one disk. This is true only in RAID 3 (under
certain conditions), where parity is written as a separate operation
to one dedicated parity disk. With distributed parity in RAID 5 this
bottleneck is overcome, and write performance is better than single
disk limits.
2. These are SATA II drives which are rated at 3Gb/s, or 375MB/s;
even if single-drive I/O limits were a problem, we are not reaching
this value.
I think James Holton's suggestions are more on the mark. We will try
and investigate.
Thanks
Harry
On Jan 15, 2008, at 9:54 AM, James Holton wrote:
Ahh, there is nothing quite like a nice big cluster to bring any
file server to its knees.
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Harry M. Greenblatt
Staff Scientist
Dept of Structural Biology [EMAIL PROTECTED]
Weizmann Institute of Science Phone: 972-8-934-3625
Rehovot, 76100 Facsimile: 972-8-934-4159
Israel
