Re: (ITS#5114) pcache cache results for searches that hit size/timelimit

[rhafer@suse.de]

On Wednesday 29 August 2007 18:48, ando@sys-net.it wrote:
> rhafer@suse.de wrote:
> > But a malicous client can then just send requests with sizelimit 1. Those
> > query will get cached and the database is of no real use anymore (IMO).
>
> Well, in this case, the proxycache should either change the sizelimit
> (and the timelimit) to unlimited, and deal with client-requested limits
> locally,
This seems like the nicest approach to solve the problem. But seems to be a 
bit more effort.
My suggest for a quick fix for this issue would be to just not cache queries 
that return one off the _LIMIT_EXCEEDED error codes. Probably with checking 
if it was a client-requested limit or a limit of the server side (in which 
case we could probably cache the results).

> or consider uncacheable those requests that specify a time or a 
> size limit.
Well that would cause even those queries being uncachable that would not hit 
the requested limit. If I understand you correctly.

> On the contrary, they should be considered answerable if a 
> corresponding request is cached, and the limits should be checked locally.

-- 
Ralf