Messages in this thread | | | Date | Fri, 23 Feb 2007 06:41:51 -0500 (EST) | From | Justin Piszcz <> | Subject | 2.6.20: stripe_cache_size goes boom with 32mb |
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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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