Re: replication. keepalive searching...

[Howard Chu <hyc@symas.com>]

Pierangelo Masarati wrote:
> Aaron Richton wrote:
> > If you're using 2.3.33, SO_KEEPALIVE should be set (see the ITS and 
> > CHANGES). You can look at your FreeBSD documentation to determine how 
> > to tune the kernel TCP parameters thereof.
>
> AFAIR, SO_KEEPALIVE isn't the solution as on most systems it defaults to 
> a couple of hours, and manuals usually suggest to leave it untouched to 
> avoid instabilities (no more details at hand right now).
>
> In a custom development where proxies are involved, we designed a 
> background thread that periodically performs a simple operation on all 
> proxy cached connections and, in case of failure, trashes the cached 
> connection.  Maybe something similar could be set up for syncrepl as 
> well, since in principle multiplexed operations should be possible on 
> the connection created for sync replication.
>
> p.

Interesting idea. I suppose a query on the rootDSE would suffice.

--
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc
  Chief Architect, OpenLDAP     http://www.openldap.org/project/