On 03/10/2017 02:38 AM, Matus UHLAR - fantomas wrote: >> On 03/09/2017 10:24 AM, Matus UHLAR - fantomas wrote: >>> is running aufs with rock store and safe, when not running with "-N"? > > On 09.03.17 11:02, Alex Rousskov wrote: >> Running AUFS in SMP mode is unsafe by default but some admins use >> configuration hacks to make it work for them. Primary Store developers >> do not test such configurations (or AUFS in general). > > according to the "workers" docs, "workers 0" is the same as "squid -N" and > "workers 1" is non-SMP mode Sorry, but that 2010 documentation is outdated. It was written before Rock store, a 2011 feature that changed what "SMP mode" means. This is my fault. Here is a replacement draft that I was working on until wiki went down: > NAME: workers > DEFAULT: 1 > Number of main Squid processes or "workers" to fork and maintain. > > In a typical setup, each worker listens on all http_port(s) and > proxies requests without talking to other workers. Depending on > configuration, other Squid processes (e.g., rock store "diskers") > may also participate in request processing. All such Squid processes > are collectively called "kids". > > Setting workers to 0 disables kids creation and is similar to > running "squid -N ...". A positive value starts that many workers. > > When multiple concurrent kids are in use, Squid is said to work in > "SMP mode". Some Squid features (e.g., ufs-based cache_dirs) are not > SMP-aware and should not or cannot be used in SMP mode. > > See http://wiki.squid-cache.org/Features/SmpScale for details. The final version will probably move and extend the terminology-related text to the SMP section preamble -- it is kind of wrong to talk about diskers when documenting workers. Improvements and constructive suggestions welcomed! > so, with "workers 1", both aufs and rock should work properly, with rock > using separate process, correct? There are several ways to interpret your question, but the most likely interpretation leads to the "incorrect" answer: Without -N, a combination of "workers 1" and at least one "cache_dir rock" enables SMP. Do not use ufs-based cache_dirs in SMP mode. >> Running a combination of AUFS and Rock stores in SMP mode is crazy. > I get that as in SMP mode, ufs should be used? I do not know what you mean by "that" but ufs is not SMP-aware. Thus, ufs (including all ufs-based stores such as aufs and diskd): * should not be used in SMP mode at all and * must not be used in SMP mode in combination with rock stores. HTH, Alex. _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
