[squid-users] Large rock supporting with stable squid version

[Amos Jeffries]

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On 25/10/2014 2:09 a.m., Ahmed Allzaeem wrote:
> Hi
> 
> I want to ask about Large rock supporting.
> 
> In large rock supporting wts the max size for disk store ? and max
> size of ram store?

The disk store limit depends on HDD/SSD space available. That goes for
all cache_dir types.


What do you mean by "ram store" ?

 IIRC, rock storage does away with the split memory/disk "slices"
which were used in COSS. So there is no tricky management of how many
slices are in memory and swapping in/out.

 Squid has a RAM store (cache_mem) which is not particularly related
to Rock storage. You need to tune that cache_mem size around how much
RAM is used for all cache_dir existing, and active transaction needs.
Nobody can tell you the answer since the administrative "test,
measure, tune" process is the only way to find it.


> 
> I need someone tried large rock with squid 3.head version and have
> seen a stability , I used last time squid3.head but it hanged after
> sometime
> 

Details required. "hangs after some time" and "it" are very vague.

> 
> I need  a help with a squid large rock  best practice.
> 

The feature is still in beta. As an early adopter you are one of the
people whose feedback will define what the best practice in future
will be.

Despite being *capable* of large object storage rock is optimal for
small objects. UFS/AUFS/diskd cache types are optimal for large
objects - except no SMP sharing there yet which is just annoying.

For now the regular best practice for cache_dir in general applies. To
ensure you have enough RAM for cache index (10-15MB er GB of cached
data) not to cause memory swapping, to ensure you do not exceded
available disk space, etc. etc.

Amos

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