[squid-users] squid workers question

[Matus UHLAR - fantomas]

>> On 09.03.17 09:07, Alex Rousskov wrote:
>>> Both rock and AUFS stores support large objects so there is no
>>> requirement to split storage based on object sizes. Each store has
>>> various pros and cons, but lack of large object support is not one of
>>> the distinguishing characteristics.
>
>> I thought the cons of *ufs/disks is ineffective storage of small files,
>> while rock is ineffective with big files...
>
>While this assertion is true in some environments for some definitions
>of "ineffective", I would avoid such generalizations: If your goal is to
>optimize overall Squid performance, then there are a lot more factors
>that you should take into account before deciding whether it is is a
>good idea to split cache_dirs based on object sizes.

aha, there's much to learn yet.
any idea where should I start?


>>> Master is not a
>>> kid (it is a parent of all kids), the first N kids are workers, the next
>>> D kids are diskers, and the last kid is Coordinator. Please see the
>>> following wiki section for more details.
>>>   http://wiki.squid-cache.org/Features/SmpScale#Terminology

>>> Yes, "1" is the default value for the workers directive.
>
>> and this is why I wonder we have three kids, both when "workers"
>> commented out and when set to 1.
>
>In my earlier paragraph, N is the value of the workers directive. There
>are other kids (D diskers and one Coordinator). D is the number of rock
>cache_dirs. Both workers and diskers need shared memory and IPC.
>
>If you want to turn off SMP while using rock store, start Squid with -N.
>When started with -N, there will be a single process playing all four
>roles (master, worker, disker, and Coordinator).

Will running with "workers 1" avoid this issue while using separate
processes for diskers?

-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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