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.)