New developer builds

14319KevinH · Post by **14319KevinH** » Fri Mar 10, 2006 1:50 pm

Just pushed new developer builds for all the platforms. Lots of little fixes and updates from the past 2 weeks. These builds have had little/no QA and are not an *official* release. We are running it as our internal mail currently.
The *big* change in this release is a new IMAP implementation based on Java NIO. This no longer requires 1 thread per connection. It also re-enabled IMAP IDLE which makes push email to mobile clients much faster.
IMAP NIO is off by default. To enable it please run:
$ tomcat stop

$ zmlocalconfig -e nio_imap_enable=true

$ tomcat start
Please let us know if you see any problems with this new IMAP impl.

phoenix · Post by **phoenix** » Fri Mar 10, 2006 2:53 pm

Another flawless upgrade, well done.

It seems to be a bit more snappy for response in the UI using FF, I guess there's some performance enhancements in there?
I've enabled IMAP NIO on my server, just out of interest what benefit does it give? The Mail Queue statistics look interesting in the Admin UI, will that be fully implemented in the next official release?

14319KevinH · Post by **14319KevinH** » Fri Mar 10, 2006 3:43 pm

Yes the server has a few tweaks to speed up conversation loading and some popular queries(is:unread). We are always trying to find ways to cache and speed up the JS code. So you'll see fixes to that in most releases.
NIO removes the limitation that the current IMAP has which every connection takes it's own thread. Using NIO we now can handle multiple connections in a single thread. So for huge deployments 100's or 1000's of users will see much better memory usage (ie less). If you've only got a 10's of user's you may not see a huge difference. Of course the fact that IMAP IDLE is now back on.
NOTE: It seems under certain cases the new code will still lock-up with IMAP IDLE. We are looking at that now.

jholder · Post by **jholder** » Sat Mar 11, 2006 7:12 pm

I noticed that you mentioned that there might be some bugs in the code that causes freezing.
Any updates?

14319KevinH · Post by **14319KevinH** » Sat Mar 11, 2006 8:15 pm

It appears to be a rare case, again related to IMAP idle. If your worried about it just leave NIO off. It will be fixed in the next build.

RyecoAaron · Post by **RyecoAaron** » Mon Mar 13, 2006 6:00 pm

Is the FC4 version missing the zmstatuslog, zmdisklog, and zmqueuelog files? I didn't have time to download another version to check but I was getting error emails saying they were missing. They are also being emailed to zimbra@mydomain.com account (which doesn't exist). I copied them from a backup (ga 160) and everything seems to be ok now.

marcmac · Post by **marcmac** » Mon Mar 13, 2006 6:03 pm

Probably a bug - check the crontab, which is probably looking for them in /opt/zimbra/bin, and change that to libexec, which is where they should now be.

RyecoAaron · Post by **RyecoAaron** » Mon Mar 13, 2006 6:12 pm

[quote user="marcmac"]Probably a bug - check the crontab, which is probably looking for them in /opt/zimbra/bin, and change that to libexec, which is where they should now be.[/QUOTE]

That's what it was and the files were in libexec. All good now

Thanks