[squid-users] SMP and AUFS

[Matus UHLAR - fantomas]

>On 03/20/2017 10:15 AM, Matus UHLAR - fantomas wrote:
>> Well, I personally will still be curious how much does SMP affect the
>> case of one worker and one or more diskers...

On 20.03.17 12:19, Alex Rousskov wrote:
>I do not understand why you are asking this question in AUFS context.
>AUFS does not use diskers!

because it's diskers (rock store) who switch to SMP mode when "workers 1" is
used, and this may cause troubles to *ufs.

> Today, only Rock store uses diskers (in SMP
>mode). Some other [ufs-based] cache stores use various helper threads
>and processes for I/O as well, but those helper processes are not
>diskers or even kids in SMP terminology.

this is something I'd like to understand better...

>> do diskers only provide I/O to the requestor?

>Diskers primary function is low-level disk cache I/O. Like all kids,
>diskers respond to cache manager requests and Squid management events
>(e.g. shutdown and reconfiguration). IIRC, diskers also build in-RAM
>cache_dir index.
>
>    http://wiki.squid-cache.org/Features/SmpScale#Terminology

their own or also the shared one?

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