Hello,
I profiled some raid5 reads using oprofile to try to track down the
suspiciously high cpu load I see. This uses the same 8-disk SATA setup
as I had described earlier. One of runs is on a 1MB chunk raid5, the
other on a 32MB chunk raid5. As Neil suggested memcpy is a big part of
the cpu
Greetings all.
This issue - improving read performance on md/raid5 - has come up a
few times just recently, and I currently have two private emails on
the topic waiting to be answered. While I do plan to answer those, I
generally prefer to have discussions about RAID openly on this
mailing
Brad Campbell wrote:
G'day all,
I have a box here.. it has a 2Ghz processor and 1.5GB of ram. It runs
the entire OS over NFS and it's sole purpose in life is to run 15 SATA
drives in a Raid-6 with ext3 on it, and share that over NFS. Most of
that ram is sitting completely idle and thus I
