Hi Amos, Thanks for the detailed response. This helps. Thanks On Fri, Jul 6, 2012 at 8:18 PM, Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote: > On 7/07/2012 5:41 a.m., Abhishek Chanda wrote: >> >> Hi Amos, >> >> I need to have a list of all files cached in a network which has >> multiple instances of Squid running. So, I was looking for an API to >> query the cache and retrieve metadata about the files there. Is there >> a better way to do this? > > > "Files"? what files? > > HTTP is a generic information transfer protocol, not a file access protocol. > Some of those resources are "files" on the origin server but the large > majority are not even that. This is somewhat betrayed by that objects > report, which would probably be called "files" if that were what Squid deals > with. > > The well-known UFS storage model uses system files as places to store the > cache data. But there is no relationship between the on-disk UFS filename > and content stored there beyond a hash code in Squid memory. Squid uses > these disk files like most programs use virtual RAM / swap disk, to swapout > things (or bits of things) which may still be useful in future but are > taking up too much memory space to keep there. > > The best way is to query the Squid manager component the cachemgr.cgi > program is just a helper that does queries to access that information. The > manager has a HTTP request based API. > http://wiki.squid-cache.org/Features/CacheManager > http://wiki.squid-cache.org/Features/CacheManager/Objects > > If you notice from that second page the example report, there is a mix of > cached objects. Some have URLs, some only have file code numbers (eg "Swap > Dir 0, File 0X00D05A"). HTTP is not restricted to web pages and most web > pages are not actually built from storable files. > > For on-disk storage analysis there is squidpurge and ufsdump tools for > UFS/diskd/AUFS cache storage model, cossdump tool in squid-2.7 for COSS > storage model. We do not have anything currently to dump out a report of the > new rock storage database content. The in-memory objects are in that > vmobjects report. > > Amos > > >> >> Thanks for the link Waitman, I will look into it. >> >> Thanks >> >> On Fri, Jul 6, 2012 at 8:40 AM, Waitman Gobble <waitman@xxxxxxxxxxx> >> wrote: >>> >>> On 7/6/2012 12:00 AM, Amos Jeffries wrote: >>>> >>>> On 6/07/2012 12:15 p.m., Abhishek Chanda wrote: >>>>> >>>>> Hi all, >>>>> >>>>> Does Squid have an API to query the content of the cache? I am aware >>>>> of contentmgr.cgi, but I am looking for an API that I can call from my >>>>> code. >>>>> >>>>> Thanks >>>> >>>> >>>> Why would your code want to reach into the code of another program and >>>> do >>>> things? >>>> >>>> What are you trying to achieve? >>>> >>>> Amos >>> >>> >>> Hi, >>> >>> An alternative you may want to check out is an e-cap module. Here is a >>> simple example which stores the chunks in mongodb. It is possible to >>> combine >>> chunks into complete documents/etc however it seems to perform much >>> better >>> if you stuff the chunks and combine them later. >>> >>> https://github.com/creamy/ecap-mongo >>> >>> Waitman Gobble >>> San Jose, California >>> > >
