Re: SMP: process-specific options

mån 2010-02-22 klockan 20:38 -0700 skrev Alex Rousskov:

> For logs, can we just use O_APPEND and have each process write to the
> logs as we do now?

I would funnel the logs all via the same log_daemon..

but I guess O_APPEND would work out reasonably well, but it's a high
likelyhood that one want's to do something more elaborate with the logs
in a setup needing SMP in the first place..

> Log rotation will probably need special care to avoid rotating the same
> log many times. It is relatively easy to designate one process to do the
> rotation (e.g., squid1), but that alone is not enough to synchronize
> everything. Ideally, I would prefer to avoid locking. Any clever tricks
> applicable here?

We never had very synchronized log rotation. It's always been "fire off
a singnal and try to guess when rotation have finished", with some data
trickling into cache.log from helpers quite long after it's been
rotated.

Regards
Henrik
Received on Tue Feb 23 2010 - 19:09:23 MST