[SSSD] How to tune the failover mecanism ?

Simo Sorce simo at redhat.com
Mon Dec 3 20:21:25 UTC 2012


On Mon, 2012-12-03 at 21:12 +0100, Olivier wrote:
> I may be wrong but that is not exactly the way I read the man page :
> http://linux.die.net/man/5/sssd-ldap
> 
> On failover section :
> 
> --> Further connection attempts are made to machines or services
> marked as offline after a --> specified period of time; this is
> currently hard coded to 30 seconds.
> 
> As I understand it, once a machine or service has been stamped "offline",
> then it won't be queried before 30 second has passed.
> 
> The delay I would like to know (and to tune if possible) is the time after which
> sssd query the next ldap server in ldap_uri list if the current one is
> not reachable
> (IMHO, 5 second would be more than enough and I think would even tune less
>  if I could).

Ah I think you've been mislead by the timeout section.

That doesn't apply to a specific server but to a general attempt to go
online.

If I remember correctly, when SSSD tries to go online it will try the
first server, and if it fails it will immediately try the next and so on
until it finds one that works or goes back offline because none work.

If it goes back offline it will wait at least 30 sec. before going
online but will go online only if there is an event that requires data
after the 30 sec. has gone by.

HTH,
Simo.

-- 
Simo Sorce * Red Hat, Inc * New York




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