How can I speed up a RAID 5 grow operation?
Hello all,
I am growing my RAID array again. It consists of 4x500GB in RAID 5, growing to 5x500GB in RAID 5. Unfortunately, at its current rate, it is going to take forever: Code:
damien@mediabox:~$ cat /proc/mdstat Given that I'd rather not wait that long, is there any way to speed it up? I have seen fleeting references to: Code:
damien@mediabox:~$ cat /proc/sys/dev/raid/speed_limit_min Cheers Damien. |
Those numbers mean what they say, in kilobytes per second. As far as your array is concerned, it also depends on your drive speed, controller, and peripheral bus used.
Upping the max value won't do anything, as your system will never reach that value unless you got some 4G FC attached DA or SAN storage on 4x or above PCI-E, which doesn't seem to be the case. Instead, up the minimum. Try the following value: Code:
echo 50000 > /proc/sys/dev/raid/speed_limit_min |
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