Jean-Sylvestre Gakwaya wrote:
>
> Hello all,
>
> I am a newbie in caching stuff :O) I have a very simplicist question :OS
> What is the relationship between replication and caching? I mean that to
> elaborate a caching mesh, or when a document is stale, problem of replication
> comes ... so, is there any protocol about interaction between both kind of
> protocols: caching and replication?
>
> Thanks in advance,
Actually you can integrate replica (WWW or FTP mirror) in the caching
mesh. It can be done quite easily with writing:
1) ICP daemon that will provide HITs or MISSes based on the knowledge of
the replicated content.
2) Tool to create cachedigest file (for better scalability of the
communications with the cachedigest enabled caches)
3) Module for the web server that will respond to the proxy requests
with internal redirects to the replicated content.
You can do this using Martin Hamilton's Perl modules WebCache:ICP and
WebCache:Digest and <100 lines perl script for the Apache Web server.
The good thing is that one can create such replicas with the
authorization of the content provider (and under supervision), the bad
is that ICP is poorly scalable.
Alexei.
This archive was generated by hypermail 2b29 : Thu Nov 18 2004 - 11:21:29 MST