On 10/11/2018 02:15 AM, juju wrote: > on http://www.squid-cache.org/Doc/config/cache_dir/: > "In SMP configurations, cache_dir must not precede the workers option > and should use configuration macros or conditionals to give each worker > interested in disk caching a dedicated cache directory" > Perhaps it would be good to specify for which version and which > cache_dir type this note is for. Yes, that stale note should be rephrased to discourage unsupported configurations or even replaced with Squid warnings about unsupported use of ufs-based cache_dirs in SMP configurations. I am not sure, but I suspect the "must not precede" part is also stale or, at the very least, should be unnecessary -- if the right order is still required, Squid should detect wrong order and quit with an error message. Quality patches welcomed. Alex. > Le mercredi 10 octobre 2018 à 19:38:55 UTC+2, Alex Rousskov a écrit : > > > On 10/10/2018 09:10 AM, Amos Jeffries wrote: >> On 11/10/18 3:01 AM, juju wrote: >>> Hello, >>> Sorry if this question has already been posted ( I can't check as the >>> "Search Function" is currently not working ) >>> I'm running squid-3.5.20 on Amazon Linux 2018.03. 2 cores with 8 GB >>> My squid is currently working but only on 1 core. >>> I which to use the 2 cores. I understood that I have to use workers in >>> squid.conf with separate cache directory. > >> This is not quite correct. > >> Per-worker configuration is only required for features which are not yet >> SMP-aware. > > > Just a couple of additional clarifications, not contradicting what Amos > has said: > > >> The rock cache type *is* SMP-aware, so one directory can be shared by >> workers. > > "can be" and "must be". We do not support worker-specific cache_dirs. > > In case of rock cache_dirs, I do not know for sure what would happen if > cache_dirs are configured on a per-worker basis, but I suspect that > there will be no disker processes to serve them. At best, you will get > no disk caching at all. > > >> The UFS/AUFS/diskd cache types are not SMP-aware yet, so they do need >> separate directories per-worker currently. > > ... but worker-specific cache_dirs are not supported, will violate HTTP > rules, etc. > > >> Since you are using only rock type caches you do not have to do anything >> special for SMP to work. > > ... with your simple configuration that does not use SMP-unaware features. > > In fact, with rock cache_dirs, you do not even have to specify multiple > workers to get SMP Squid -- by default, Squid will run in SMP mode if > you have one worker (default) and at least one rock cache_dir. However, > multiple workers may be necessary to better utilize multicore CPUs. > > Beware of hyperthreading: Do not expect two workers, each showing 80+% > CPU utilization to be able to share a single physical CPU core > efficiently. I do not know whether your two cores are hyperthreaded or real. > > N.B. To search the mailing list archives, consider using your favorite > search engine. Many would accept a site:lists.squid-cache.org restriction. > > Alex. > > _______________________________________________ > squid-users mailing list > squid-users@xxxxxxxxxxxxxxxxxxxxx <mailto:squid-users@xxxxxxxxxxxxxxxxxxxxx> > http://lists.squid-cache.org/listinfo/squid-users _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
