Re: [squid-users] question about large rock

  Thanks.

于 28/1/14 上午2:59, Alex Rousskov 写道:
> On 01/27/2014 05:26 AM, k simon wrote:
>
>> I noticed large rock have merged to squid 3.5, I have some question
>> about your large rock patch.
>
>
> Hello Simon,
>
>> 1,Does large rock support non-SMP instance?
>
> Yes. Rock store can be used in non-SMP mode (as defined at [1]). Rock
> store uses blocking disk I/O in non-SMP mode.
>
> Please note that if your Squid is SMP-capable (e.g., atomics are
> supported) and SMP is allowed (e.g., no -N), then Squid will start one
> disker process per Rock cache_dir and, hence, will use SMP mode, even if
> you have a single worker.
>
>
>> I know the rock store must used with worker.
>
> Not sure what you mean. Squid cannot work without a worker. Diskers are
> not required for Rock store. Without diskers, the performance should be
> significantly worse though because blocking disk I/O will block the
> entire worker process. For SMP terminology, please see [1].
>
>
>> 2,Does large rock solve rebuilding time too long issue?
>
> Current large rock has about the same cache index building time as small
> rock. Whether that time is "too long" depends on many factors, but we
> have not optimized anything in that area (yet).
>
>
>> 3,Can large rock support range splice?
>
> I do not think Squid itself supports range splicing. If Squid supports
> them, Rock store should support them as well.
>
>
> HTH,
>
> Alex.
> [1] http://wiki.squid-cache.org/Features/SmpScale
>
Received on Tue Jan 28 2014 - 02:45:41 MST