Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 27

Thread: Looks interesting, but....

  1. #11
    GertThiel is offline Active Member
    Join Date
    Sep 2005
    Location
    Germany
    Posts
    42
    Rep Power
    9

    Default

    Quote Originally Posted by abo
    With many thousands of users and houndreds of gigabytes of mail, moving would be a big deal.
    I think, that Zimbra lacks an IMAP migration tool. I have some experience with imapsync and learned that a Zimbra component would have some importatnt advantages:

    • ZCS could read the mbox files or maildir hierarchies directly to reduce network load
    • ZCS could schedule the migration itself and avoid too many processes happen at once


    - Gert

  2. #12
    KevinH's Avatar
    KevinH is offline Expert Member
    Join Date
    Aug 2005
    Location
    San Mateo, CA
    Posts
    4,789
    Rep Power
    19

    Default

    Quote Originally Posted by abo
    Well, actually, what I'm after is an IMAP client inside Zimbra, so that I can keep the mail on the existing IMAP server but still use the Zimbra AJAX web client.
    Got it. (In fact more than one of my colleges here came by to tell me that I missed the point after I posted my first response )

    Today we don't have something that can *mount* or *proxy* existing IMAP accounts. It's something we've talked about but just haven't had the time to build. If there's enough interest in this type use then we'll add it, that is if somebody in the community doesn't add it first!

  3. #13
    KevinH's Avatar
    KevinH is offline Expert Member
    Join Date
    Aug 2005
    Location
    San Mateo, CA
    Posts
    4,789
    Rep Power
    19

    Default

    Quote Originally Posted by GertThiel
    I think, that Zimbra lacks an IMAP migration tool. I have some experience with imapsync and learned that a Zimbra component would have some importatnt advantages:


    • ZCS could read the mbox files or maildir hierarchies directly to reduce network load
    • ZCS could schedule the migration itself and avoid too many processes happen at once

    - Gert


    Yes this is something we will probably look at first. How can we speed up or reduce the load it takes to migrate existing users? Some sort of backdoor eliminating the IMAP protocol overhead

  4. #14
    GertThiel is offline Active Member
    Join Date
    Sep 2005
    Location
    Germany
    Posts
    42
    Rep Power
    9

    Default

    Quote Originally Posted by KevinH
    Yes this is something we will probably look at first. How can we speed up or reduce the load it takes to migrate existing users? Some sort of backdoor eliminating the IMAP protocol overhead
    You are asking, so I'm feeling addressed

    Do you know Mule Universal Message Objects?

    Delay indexing while importing.

    Because you know everything about ZCS internals, you could a migration tool that would the data directly to disk and database without ZCS running and cosuming ressources.

    - Gert

  5. #15
    GertThiel is offline Active Member
    Join Date
    Sep 2005
    Location
    Germany
    Posts
    42
    Rep Power
    9

    Default

    Quote Originally Posted by KevinH
    Some sort of backdoor eliminating the IMAP protocol overhead
    You could incorporate Cyrus IMAPd into ZCS like you did with Postfix. Cyrus never died under my eyes and handles the biggest message stores flawlessly.

    You could concentrate on the AJAXed web client and groupware related additions, if that would be compatible with your business plans.

    - Gert

  6. #16
    anand is offline Zimbra Employee
    Join Date
    Sep 2005
    Posts
    274
    Rep Power
    9

    Default re: why don't your just integrate cyrus-imap.

    ZCS server does a lot of things that cyrus-imap doesn't. It's a
    calendar server, it's an admin server, it's an index of all your
    collab data, and it's going to be a lot more things in the future.
    cyrus-imap just does email/IMAP, albeit very very well. For a sound
    architecture for all the things we do, and we will do, it does not
    make sense for us to store email inside cyrus-imap, and then deal with
    all the other data differently. We will support murder like
    functionality pretty soon.

  7. #17
    goo0h is offline Active Member
    Join Date
    Sep 2005
    Posts
    47
    Rep Power
    9

    Default

    Quote Originally Posted by anand
    ZCS server does a lot of things that cyrus-imap doesn't.
    I guess so that data can be truly integrated for the user, having a one-server-does-everything approach probably makes sense. On the other hand, probably one of the biggest reasons why I liked OpenXchange is because they spread the services onto different components, some of which could even be on different hardware. With the one-server-does-everything approach I have concerns that scalability might be an issue.

    As an example, we do mail routing (Postfix) and spam/virus scanning (amavisd-new, SpamAssassin, ClamAV, McAfee) on other boxes, then use LMTP to deliver messages into the (Cyrus) message store.

    There's also the unfortunate aspect that by designing the mail server from scratch, y'all are having to, at least in some respect, re-invent the wheel. What about the ACL extension? The QUOTA extension? Support for public folders? We make use of shared folders extensively.

    Have y'all done benchmarks of your POP/IMAP server against other implementations? If y'all had some mind-blowing performance numbers, then that might help ease the anxiety of a massive migration.....

  8. #18
    marcmac is offline Expert Member
    Join Date
    Sep 2005
    Posts
    2,103
    Rep Power
    13

    Default ZCS works in a distributed environment

    Quote Originally Posted by goo0h
    I guess so that data can be truly integrated for the user, having a one-server-does-everything approach probably makes sense. On the other hand, probably one of the biggest reasons why I liked OpenXchange is because they spread the services onto different components, some of which could even be on different hardware. With the one-server-does-everything approach I have concerns that scalability might be an issue.

    As an example, we do mail routing (Postfix) and spam/virus scanning (amavisd-new, SpamAssassin, ClamAV, McAfee) on other boxes, then use LMTP to deliver messages into the (Cyrus) message store.

    There's also the unfortunate aspect that by designing the mail server from scratch, y'all are having to, at least in some respect, re-invent the wheel. What about the ACL extension? The QUOTA extension? Support for public folders? We make use of shared folders extensively.

    Have y'all done benchmarks of your POP/IMAP server against other implementations? If y'all had some mind-blowing performance numbers, then that might help ease the anxiety of a massive migration.....
    ZCS can be installed, relatively simply, in this kind of architecture. Install the ldap server first, then subsequent installs can be configured to run any combination of mta and/or store servers on diverse servers.

  9. #19
    anand is offline Zimbra Employee
    Join Date
    Sep 2005
    Posts
    274
    Rep Power
    9

    Default

    Quote Originally Posted by goo0h
    As an example, we do mail routing (Postfix) and spam/virus scanning (amavisd-new, SpamAssassin, ClamAV, McAfee) on other boxes, then use LMTP to deliver messages into the (Cyrus) message store.
    heh. Zimbra takes the same approach.

    What about the ACL extension? The QUOTA extension? Support for public folders? We make use of shared folders extensively.
    Coming, yes and coming.

    Have y'all done benchmarks of your POP/IMAP server against other implementions?
    Also in progress.

  10. #20
    Digus is offline New Member
    Join Date
    Oct 2005
    Posts
    3
    Rep Power
    9

    Default

    Quote Originally Posted by abo
    Well, actually, what I'm after is an IMAP client inside Zimbra, so that I can keep the mail on the existing IMAP server but still use the Zimbra AJAX web client.
    Agreed. If Zimbra had an Imap client and shared calendar/contacts functionality, I would get pretty serious about implementing/migrating right away. Also, It would be nice to view/kill current user sessions from the admin interface.

    Guess this should've gone in the admin section though...
    Last edited by Digus; 10-04-2005 at 07:51 AM.

Page 2 of 3 FirstFirst 123 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Disable admin from viewing user mails
    By scalper in forum Administrators
    Replies: 4
    Last Post: 07-06-2007, 05:25 AM
  2. Include contacts from a file
    By Oswald-Kolle in forum Developers
    Replies: 1
    Last Post: 03-01-2007, 10:32 AM
  3. Security Bug in Zimbra?
    By generic31 in forum Administrators
    Replies: 19
    Last Post: 02-05-2007, 09:46 PM
  4. Changing the port Zimbra uses
    By crp in forum Administrators
    Replies: 9
    Last Post: 11-05-2006, 10:52 AM
  5. Very Interesting. What about Revenues ?
    By managedcode in forum Users
    Replies: 3
    Last Post: 10-07-2005, 07:09 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •