I repeat: what does the patch do (or is this no longer applicable)?
This was for if your stripe_cache_size was above a certain number, it
would run at 1-3MB/s rebuild speed. You can always force with the min
parameter. Forcing it you should get good speed, faster than 1-3MB/s
anyway :)
Justin.
On Tue, 26 Jun 2007, Jon Nelson wrote:
On Tue, 26 Jun 2007, Justin Piszcz wrote:
On Tue, 26 Jun 2007, Jon Nelson wrote:
On Tue, 26 Jun 2007, Justin Piszcz wrote:
On Tue, 26 Jun 2007, Jon Nelson wrote:
On Mon, 25 Jun 2007, Justin Piszcz wrote:
Neil has a patch for the bad speed.
What does the patch do?
I repeat: what does the patch do (or is this no longer applicable)?
sync_speed_max defaults to 200000 on this box already.
Altering sync_speed_min...
I tried a binary search of values between the default (1000)
and 60000 which resulted in some pretty weird behavior:
at values below 26000 the rate (also confirmed via dstat output) stayed
low. 2-3MB/s. At 26000 and up, the value jumped more or less instantly
to 70-74MB/s. What makes 26000 special? If I set the value to 20000 why
do I still get 2-3MB/s actual?
Sounds quite strange, what chunk size are you using for your RAID?
The default: 64
md0 : active raid5 sdc4[2] sda4[0] sdb4[1]
613409664 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
--
Jon Nelson <jnelson-linux-raid@xxxxxxxxxxx>
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