Re: [squid-users] Resize coss online

2011/1/12 Amos Jeffries <squid3_at_treenet.co.nz>:
> On 12/01/11 20:12, Drunkard Zhang wrote:
>>
>> I'm testing squid-2.7STABLE9 + COSS + ext4 + SSD now.
>>
>> When enlarge the coss, eg: from 10240 to 20480, I can see success in
>> cache.log, but the coss file on disk did not change, after 3 times of
>> "squid -k reconfigure" the coss file size changed.
>
> How long did you wait? it could be that Squid was doing a long resize in the
> background. This is a guess supported by the change actually happening.
>
>> But some times later, the squid process exited, with nothing left in
>> cache.log. Just once in cache.log I found:
>>
>> 2011/01/12 11:10:04| assertion failed: coss/store_io_coss.c:215:
>> "cs->curstripe<  (cs->numstripes - 1)"
>>
>> So, I wondering if resize of coss online is supported perfectly, that
>> we can use it without anxiety.
>> BTW, is shrink of coss filesystem is supported? If it is, do I have to
>> do it online, or offline? By online, I means operates without restart
>> squid process, and the offline means opposite.
>
> I think you need to try offline change. Via a stop, squid -z and restart
> sequence.

Thanks, maybe I'm too hurry.

>> With squid-2.7STABLE9 + COSS + btrfs + SSD, reload can cause process
>> to stuck, with 100% CPU usage per squid process. I caught these info
>> in cache.log once:
>>
>> 2011/01/09 14:56:44| Killing RunCache, pid 59502
>> 2011/01/09 14:56:44| kill 59502: (1) Operation not permitted
>>
>> And kill of the process will make the process into a zombie. The
>> defunct process still using 100% CPU, which wasn't show in ps.
>>
>> squid75 ~ # ps -eo pid,%cpu,cmd --sort=c
>> 59343  2.7 [squid]<defunct>
>> 59505  2.8 [squid]<defunct>
>> 59380  2.9 [squid]<defunct>
>> 59474  2.9 [squid]<defunct>
>> 42558  3.4 [btrfs-endio-1]
>> 43717  3.7 (squid) -YC -D -f squid73.conf
>> 43925  4.0 (squid) -YC -D -f squid74.conf
>> 42520  4.3 (squid) -YC -D -f squid75.conf
>> 51532  4.4 (squid) -YC -D -f squid77.conf
>> 18014  5.9 (squid) -YC -D -f squid72.conf
>
> FWIW;
>  I think you will very much want to play with the squid-3.2 "RockStore" code
> being written by The Measurement Factory guys. Contact Alex for ways to get
> a current working version.
>
We did a test on squid-3.2, but using of 3.2 make no difference to
what we are doing now. SMP acts very similar to our multi-instance
mode... but still looking forward.
Received on Wed Jan 12 2011 - 13:54:34 MST