Ken Murchison schrieb: > > Simon Matter wrote: > > > > I have enabled compilation of idled in my newest RPM but am wondering > > whether that was a good idea. I have two questions: > > > > 1) I was searching the archives and docs but still can't find a > > description of the advantages and drawbacks when using idled instead of > > poll. What are the drawback of possible problems I may face when using > > idled? > > Being the guy that wrote idled, I guess I have to answer ;) > > The main advantage of idled versus polling is that you get event-driven > instant notification of message changes (new, delete, flag changes, etc) > in your client when IDLEing (light load on the server, because it only > checks the mailbox when told to). With polling, you can can updates as > fast as 1 sec, but you can beat the crap out of the server if you have a > lot of users polling that much. > > The downside of using idled is that it might not scale well. I haven't > received any input from a large site using idled. > > Keep in mind that idled (or polling) is only used when the client issues > the IDLE command. The only mainstream client that I'm aware of that > uses IDLE is Outlook.
Thanks. So it means it's only interesting in an Outlook environment for now. > > > > > 2) I have read the man pages but still don't fully understand how things > > work. > > From the man page: > > ===== > > imapidlepoll: 60 > > The interval (in seconds) for polling the mailbox for changes while > > running the IDLE command. This option is > > used when idled can not be contacted or when polling is used > > exclusively. The minimum value is 1. A value of 0 > > will disable polling (and disable IDLE if polling is the only method > > available). > > ===== > > > > 60 is the default value for imapidlepoll. It means that unless specified > > otherwise, IDLE is always enabled, using polling or idled. Only setting > > it to 0 does in fact disable IDLE. The man pages also say that if idled > > can not be contacted, poll is used instead. > > My problem is now that I have compiled with idled but not enabled it in > > cyrus.conf. I then get following messages: > > /var/log/messages:Nov 22 22:26:56 xxl imapd[2594]: error sending to > > idled: 2 > > Is this message only a warning message or does it mean I really have to > > start idled if it's compiled in? > > If you compile with idled enabled, it expects it to be running. IIRC, > it will try talking to idled a handful of times, and then give up (using > polling exclusively). Okay, that explains it. Thanks! Simon > > Ken > -- > Kenneth Murchison Oceana Matrix Ltd. > Software Engineer 21 Princeton Place > 716-662-8973 x26 Orchard Park, NY 14127 > --PGP Public Key-- http://www.oceana.com/~ken/ksm.pgp
