[squid-users] R: [squid-users] cache size and structure

>> excuse me, 1 megabit per second for a week, so :
>> 1 Mb *60*60*24*7=604.800 / 8 = 75.600 MB about 76 GB traffic for week.
>> I'm refering both inbound and outbound traffic (1 Mbps in , 1 Mbps out).

>Well, that is just one megabit per second. That is the link bandwidth, it's
>irelevant to provide different interval, you are just confusing us (or at
>least me). We can count how much does that make for a day, week, month,
>year
>...

Matus Uhlar,
my internet link bandwidth is about 10 Mbps and I'm monitoring (by mrtg)
traffic usage of my Squid parent (A), which is about 1 Mbps for a week (so
76 GB data traffic for a week). I have also 2 squid chileds (B,C) which
communicate to squid A. Some user groups use Squid A, others use Squid B and
others use Squid C.
1 Mbps

>so, some users access directly your squid?
yes

-----Messaggio originale-----
Da: Matus UHLAR - fantomas [mailto:uhlar_at_fantomas.sk]
Inviato: Tuesday, June 30, 2009 4:48 AM
A: squid-users_at_squid-cache.org
Oggetto: Re: [squid-users] cache size and structure

>>>> My cache traffic volume (I/O) is about 2 Mbps a week with peaks of
>>>> 3 Mbps.
>>
>> ehm, 2 megabits per socond "a week"?

On 25.06.09 23:01, Riccardo Castellani wrote:
> excuse me, 1 megabit per second for a week, so :
> 1 Mb *60*60*24*7=604.800 / 8 = 75.600 MB about 76 GB traffic for week.
> I'm refering both inbound and outbound traffic (1 Mbps in , 1 Mbps out).

Well, that is just one megabit per second. That is the link bandwidth, it's
irelevant to provide different interval, you are just confusing us (or at
least me). We can count how much does that make for a day, week, month, year
...

>> If users acess your squid directly (not only through child proxies),
there
>> may be the need for cache_mem.
>
> some users access by child squids

so, some users access directly your squid?

>> I have "48 256" for 20GiB cache. If you take the number of files in the
>> cache directory, divide by 256 (l2 dirs) and 256 (max files in l2 dir),
you
>> should get the approximate need of l1 dirs. The average object size is
>> aropund 13KiB, which means, you should have one L1 cache_Dir per ~800MiB
of
>> cache size. Splitting small files to COSS (using min-size option for *ufs
>> and max-size for COSS) will make that even smaller number, since only big
>> iles will be placed to *ufs directory hierarchy.
>
>
> I'm sorry but I didn't understand.
> How can I enable COSS ?

by using configure option when building squid. It's only stable in squid-2.7
though. If you have 2.7 already built, check if it's not enabled anymore,
and you can reserve some disk space for COSS cache_dir.

look at http://devel.squid-cache.org/coss/index.html
and http://devel.squid-cache.org/coss/coss-notes.txt
 

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