Re: [squid-users] Mem Cache flush

On Wed, Feb 13, 2008, pokeman wrote:
>
> thanks i just switch my cache drives to aufs can you explane me in detail
> what other changes i made in my squid.conf for high cache resuls we have
> almost 45 mb link for proxy services 30 mb. can i add more harddrive to
> caching or just tweak to my squid and linux kernal. ! remember we are using
> RHEL ES 4 . i know bsd given high availablity but we can'nt use

You can just convert diskd to aufs, yes, as long as its compiled in.
It just requires a restart to be safe.

You then need to grab some logfile statistics stuff from the internet
and see what content is being cached and what isn't being cached.
Then you can decide what to look to cache. :)

ADrian

>
> Adrian Chadd wrote:
> >
> > G'day,
> >
> > A few notes.
> >
> > * Diskd isn't stable, and won't be until I commit my next set of patches
> > to 2.7 and 3.0; use aufs for now.
> >
> > * Caching windows updates will be possible in Squid-2.7. It'll require
> > some
> > rules and a custom rewrite helper.
> >
> > * 3.0 isn't yet as fast as 2.6 or 2.7.
> >
> >
> > Adrian
> >
> > On Tue, Feb 12, 2008, pokeman wrote:
> >>
> >> Well I experience with squid cache not good works on heavy load I 4 core
> >> processor machine with 7 scsi drives 4 gb ram average work load in peak
> >> hours 3000 users 30 mb bandwidth on that machine using RHEL ES 4. I
> >> search
> >> many articles on high cache performance specially windows update these
> >> days
> >> very headache to save PSF extension i heard In squid release 3.0 for
> >> better
> >> performance but why squid developers could???nt find solution for cache
> >> windows update in 2.6 please suggest me if I am doing something wrong in
> >> my
> >> squid.conf
> >>
> >>
> >> http_port 3128 transparent
> >> range_offset_limit 0 KB
> >> cache_mem 512 MB
> >> pipeline_prefetch on
> >> shutdown_lifetime 2 seconds
> >> coredump_dir /var/log/squid
> >> ignore_unknown_nameservers on
> >> acl all src 0.0.0.0/0.0.0.0
> >> acl ourusers src 192.168.100.0/24
> >> hierarchy_stoplist cgi-bin ?
> >> maximum_object_size 16 MB
> >> minimum_object_size 0 KB
> >> maximum_object_size_in_memory 64 KB
> >> cache_replacement_policy heap LFUDA
> >> memory_replacement_policy heap GDSF
> >> cache_dir diskd /cache1 7000 16 256
> >> cache_dir diskd /cache2 7000 16 256
> >> cache_dir diskd /cache3 7000 16 256
> >> cache_dir diskd /cache4 7000 16 256
> >> cache_dir diskd /cache5 7000 16 256
> >> cache_dir diskd /cache6 7000 16 256
> >> cache_dir diskd /cache7 7000 16 256
> >> cache_access_log none
> >> cache_log /var/log/squid/cache.log
> >> cache_store_log none
> >> dns_nameservers 127.0.0.1
> >> refresh_pattern windowsupdate.com/.*\.(cab|exe|dll) 43200 100%
> >> 43200
> >> refresh_pattern download.microsoft.com/.*\.(cab|exe|dll) 43200 100%
> >> 43200
> >> refresh_pattern au.download.windowsupdate.com/.*\.(cab|exe|psf) 43200
> >> 100%
> >> 43200
> >> refresh_pattern ^ftp: 1440 20% 10080
> >> refresh_pattern ^gopher: 1440 0% 1440
> >> refresh_pattern cgi-bin 0 0% 0
> >> refresh_pattern \? 0 0% 4320
> >> refresh_pattern . 0 20% 4320
> >> negative_ttl 1 minutes
> >> positive_dns_ttl 24 hours
> >> negative_dns_ttl 1 minutes
> >> acl manager proto cache_object
> >> acl localhost src 127.0.0.1/255.255.255.255
> >> acl to_localhost dst 127.0.0.0/8
> >> acl SSL_ports port 443 563
> >> acl Safe_ports port 1195 1107 1174 1212 1000
> >> acl Safe_ports port 80 # http
> >> acl Safe_ports port 82 # http
> >> acl Safe_ports port 81 # http
> >> acl Safe_ports port 21 # ftp
> >> acl Safe_ports port 443 563 # https, snews
> >> acl Safe_ports port 70 # gopher
> >> acl Safe_ports port 210 # wais
> >> acl Safe_ports port 1025-65535 # unregistered ports
> >> acl Safe_ports port 280 # http-mgmt
> >> acl Safe_ports port 488 # gss-http
> >> acl Safe_ports port 591 # filemaker
> >> acl Safe_ports port 777 # multiling http
> >> acl CONNECT method CONNECT
> >> http_access allow manager localhost
> >> http_access deny manager
> >> http_access deny !Safe_ports
> >> http_access deny CONNECT !SSL_ports
> >> http_access allow ourusers
> >> http_access deny all
> >> http_reply_access allow all
> >> cache allow all
> >> icp_access allow ourusers
> >> icp_access deny all
> >> cache_mgr info@fariya.com
> >> visible_hostname CE-Fariya
> >> dns_testnames localhost
> >> reload_into_ims on
> >> quick_abort_min 0 KB
> >> quick_abort_max 0 KB
> >> log_fqdn off
> >> half_closed_clients off
> >> client_db off
> >> ipcache_size 16384
> >> ipcache_low 90
> >> ipcache_high 95
> >> fqdncache_size 8129
> >> log_icp_queries off
> >> strip_query_terms off
> >> store_dir_select_algorithm round-robin
> >> client_persistent_connections off
> >> server_persistent_connections on
> >> persistent_request_timeout 1 minute
> >> client_lifetime 60 minutes
> >> pconn_timeout 10 seconds
> >>
> >>
> >>
> >> Adrian Chadd wrote:
> >> >
> >> > On Thu, Jan 31, 2008, Chris Woodfield wrote:
> >> >> Interesting. What sort of size threshold do you see where performance
> >> >> begins to drop off? Is it just a matter of larger objects reducing
> >> >> hitrate (due to few objects being cacheable in memory) or a bottleneck
> >> >> in squid itself that causes issues?
> >> >
> >> > Its a bottleneck in the Squid code which makes accessing the n'th 4k
> >> > chunk in memory take O(N) time.
> >> >
> >> > Its one of the things I'd like to fix after Squid-2.7 is released.
> >> >
> >> >
> >> >
> >> > Adrian
> >> >
> >> >
> >> >
> >>
> >> --
> >> View this message in context:
> >> http://www.nabble.com/Mem-Cache-flush-tp14951540p15449954.html
> >> Sent from the Squid - Users mailing list archive at Nabble.com.
> >
> > --
> > - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid
> > Support -
> > - $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -
> >
> >
>
> --
> View this message in context: http://www.nabble.com/Mem-Cache-flush-tp14951540p15452542.html
> Sent from the Squid - Users mailing list archive at Nabble.com.

-- 
- Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support -
- $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -