On Tue, 2012-07-03 at 04:02 +0200, Jan Engelhardt wrote:
On Tuesday 2012-07-03 03:44, Simo Sorce wrote:
>
>The memory cache does not do negative caching indeed, but sssd_nss does,
>however it caches negative entries for a very short period of time.
How short is the default?
>However in order to notice this you'd need to have a huge amounts of
>unexisting entries you query in sequence.
It's a very bounded set of user/groups (< 5).
>> On the whole picture, I am trying out "bindfs", and how long it takes
to
>> extract e.g. a kernel tarball with a given, but fixed over all test
>> runs, set of bindfs options. It's mostly about repeated getpw*/getgr*
>> lookups (at least one per created file).
>
>Ah I see, you are paying the penalty for a full roundtrip to sssd_nss
>for each file created. I think we can work on adding some negative
>caching to the memory cache so to reduce from one call every file to one
>call every 5 seconds or so.
>
>Would you mind opening a ticket for it ?
The default trac interface is horrible. There just is no link on the
frontpage to submit an issue. (Compare with sourceforge project pages
where there is clearly "support"/"tracker". Or people accept stuff
on
mailing lists.)
When you are logged in there is a "New Ticket" button ...
Don't worry I'll open it.
Simo.
--
Simo Sorce * Red Hat, Inc * New York