Each of these are averaged over three runs with 6 SATA disks in a SW RAID
5 configuration:
(dd if=/dev/zero of=file_1 bs=1M count=2000)
128k_stripe: 69.2MB/s
256k_stripe: 105.3MB/s
512k_stripe: 142.0MB/s
1024k_stripe: 144.6MB/s
2048k_stripe: 208.3MB/s
4096k_stripe: 223.6MB/s
8192k_stripe: 226.0MB/s
16384k_stripe: 215.0MB/s
When I tried a 32768k stripe, this happened:
p34:~# echo 32768 > /sys/block/md4/md/stripe_cache_size
Connection to p34 closed
I was able to Alt-SysRQ+b but I could not access the console/X/etc, it
appeared to be frozen.
FYI.
Justin.
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