Dissapointing performance of ciss RAID 0+1 ?
ivoras at fer.hr
Thu Nov 9 13:03:29 UTC 2006
Pete French wrote:
>> You might be able to speed up the read by playing with the vfs.read_max
>> sysctl (try 16 or 32).
> Wow! That makes a huge difference, thanks. Should this not be in 'man tuning' ?
AFAIK vfs.read_max will only influence sequential reading - it's the
readahead size. Also, it's still unexplained how increasing it yields
performance better than that of 'dd' on a raw device.
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