The stripe_cache_size is a VERY important feature!

# Stripe tests:
echo 8192 > /sys/block/md3/md/stripe_cache_size

# DD TESTS

$ dd if=/dev/zero of=10gb.no.optimizations.out bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 96.6988 seconds, 111 MB/s

$ dd if=/dev/zero of=10gb.8192k.stripe.out bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 55.0628 seconds, 195 MB/s
$ 

$ dd if=/dev/zero of=10gb.16384k.stripe.out bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 56.2793 seconds, 191 MB/s


-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to