Re: [squid-users] mix: memory and hdd

On 24/02/2012 11:08 p.m., Werner Kapferer wrote:
> Hi!
>
> I'd like to split my cache in 2 parts.
> Small files (up to a specified size) should be restored ONLY in memory, bigger ones ONLY on the hdd.
>
> Is this set by default (by maximum_object_size_in_memory) or will these files saved on the hdd additionally?

That depends on your version of Squid.

The memory cache is always preferred, unless the object is too large to
fit within you max in-memory limit, or is of unknown (aka "infinitely
large") size. The only reason things get kicked out of memory cache is
overly-large, unknown size, or Squid needing more room in the memory
cache. In those cases small object which have not been needed in a long
while can get pushed out to disk.

  NP: if you have one of the officially supported Squid (2.7, 3.1+) they
will "promote" the small items back off disk into memory when they
become needed again (if ever).

You also have the option of COSS (squid-2.7) or Rock (squid-3.2+)
storage types of small objects. These act like disk-backed memcache
storage, as fast as in-memory cache for recent hot items, can be larger,
and no objects are lost on any crash or restarts.

Amos
Received on Fri Feb 24 2012 - 10:34:06 MST