Re: Running slower after raid0
On Tue, Nov 01, 2005 at 11:05:53AM -0200, Bruno Diniz wrote:
> /dev/sda:
> Timing buffered disk reads: 170 MB in 3.01 seconds = 56.41 MB/sec
> /dev/sdb:
> Timing buffered disk reads: 180 MB in 3.01 seconds = 59.81 MB/sec
> /dev/md0:
> Timing buffered disk reads: 134 MB in 3.04 seconds = 44.09 MB/sec
What kernel are you running? I don't have it that bad, with 2.6.13, but it's
definately slower than earlier 2.6 kernels. raid0 performance used to be
very good. raid1 has always sucked (reads no faster than a single drive).
/dev/md0:
Timing buffered disk reads: 322 MB in 3.01 seconds = 107.06 MB/sec
/dev/sda:
Timing buffered disk reads: 216 MB in 3.03 seconds = 71.37 MB/sec
/dev/sdb:
Timing buffered disk reads: 218 MB in 3.01 seconds = 72.53 MB/sec
--
Tom Vier <tmv@comcast.net>
DSA Key ID 0x15741ECE
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