Re: [Dovecot] No failover from director to backend?

2012-10-29 Thread Patrick Westenberg
Hi, no one here who is able to reply to my questions? Regards Patrick Patrick Westenberg schrieb: Hi everyone, short version: Is there no built in failover mechanism for the director service to handle a backend failure? Long version: I have a frontend server running the director service

Re: [Dovecot] No failover from director to backend?

2012-10-29 Thread Timo Sirainen
People already replied and pointed to poolmon. There is no built-in failure handling, because it's not possible to implement it in a way that works well for everyone. Although I think poolmon could also itself use a bit of tweaking. For example if all hosts became very heavily loaded, poolmon

Re: [Dovecot] No failover from director to backend?

2012-10-23 Thread Daniel Parthey
l...@airstreamcomm.net wrote: Considering the intention of the director was to alleviate locking issues in a shared storage environment are there any current solutions to improving the scalability/availability of Dovecot by implementing an alternative message storage systems such as nosql or

Re: [Dovecot] No failover from director to backend?

2012-10-22 Thread l...@airstreamcomm.net
On 10/21/12 2:43 PM, Daniel Parthey wrote: Patrick Westenberg wrote: Is there no built in failover mechanism for the director service to handle a backend failure? No, the director's job is to keep a hash table and direct the connection for each user to its associated backend. Currently, there

[Dovecot] No failover from director to backend?

2012-10-21 Thread Patrick Westenberg
Hi everyone, short version: Is there no built in failover mechanism for the director service to handle a backend failure? Long version: I have a frontend server running the director service and two backends. Due to maintenance I had to shut down one of the backends which caused connection

Re: [Dovecot] No failover from director to backend?

2012-10-21 Thread Daniel Parthey
Patrick Westenberg wrote: Is there no built in failover mechanism for the director service to handle a backend failure? No, the director's job is to keep a hash table and direct the connection for each user to its associated backend. Currently, there is no built-in backend monitoring. In order