Persistent services ?
Zimbra runs with several services dependently to bring up mail system. But, unfortunately, sometimes some services die unexpectly, this causes the mail system to be down.
Does Zimbra have a mechanism to keep its services to be persistent running ? I mean service will be respawn if it dies.
If Zimbra doesn't support this feature. Can I use other tool (like daemontool) to do this ?
Some processes like convertd (attachment indexer) will restart. Not everything though. You could use 3rd party program is you wish. We'd rather work to solve the issue your having with dying processes. That should not be happening and could be a problem with your config/setup.