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Switching to NSD and Dovecot

Discussion in 'General Discussion' started by wonker, Dec 18, 2008.

  1. wonker

    wonker Active Member

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    Hello,

    The latest cPanel Release 11.24.4-RELEASE now offers to change to NSD and dovecot.

    What are the risks of doing so ? Is there a risk of mail not working, or sites not being accessible after doing this change?

    I guess I will wait a bit before switching to make sure that it goes well and my customers will not notice a difference.
     
  2. cPanelDavidG

    cPanelDavidG Technical Product Specialist

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  3. cPanelNick

    cPanelNick Administrator
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    Dovecot will probably be a good choice to switch to for ALMOST everyone.

    NSD will need to be a much more careful decision.
     
  4. Voltar

    Voltar Well-Known Member

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    I switched of my servers to Dovecot recently and have seen better IMAP performance personally. I have a few mail accounts with 7000-10000 emails in them and Outlook seemed 'snappier' with Dovecot than it did with Courier.

    As for NSD, I believe if you have a fair amount of IPs on your server, you might see worse performance with NSD than BIND.
     
  5. cPanelNick

    cPanelNick Administrator
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    Note that dovecot is self optimizing so you will likely see better results 48 hours down the road instead of right away.
     
  6. wonker

    wonker Active Member

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    Thakyou for your answers.

    If I chose to switch to dovecot will I loose anything ? Will all the e-mails be kept and account settings too .. ?

    As for NSD from what I understand it's good if you don't have many IP's (I don't have many) and don't need clusters (for the moment I don't).

    Also with NSD I don't understand why you can't have a local IP address ... Some of my customers scripts use the localhost IP address, will these scripts still work if localhost IP is not specified ?
     
  7. cPanelNick

    cPanelNick Administrator
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    The release notes here should answer these questions in much better detail then I can hope to describe here:

    http://www.cpanel.net/products/cpwhm/releases/releasenotes/11.24/


    Please note the separate notes for dovecot & nsd.
     
  8. Gene Steinberg

    Gene Steinberg Well-Known Member

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    Dovecot has been a disaster on my server. Every few hours, IMAP pegs memory at 100% and server load spikes tremendously. Only restarting the server fixes it. Yes, I have filed support tickets and your people are stumped. I've posted a message about it on the Dovecot mailing list, after contacting the author. If anyone has had similar problems, let me know.

    FYI: My dedicated server has two quad-core AMD Opterons 2352 processors, 16GB RAM, and tons of disk space.

    Our email load is light to moderate, and the server is using CentOS 5.2, the 64-bit version. cPanel is at RELEASE update mode, and the latest Easy Apache has been run.

    Another server we use as a backup, a 32-bit Core2Duo setup with CentOS 4.7, never has a problem with the same configuration.

    Right now, we feel we're in another universe when it comes to this situation.

    Peace,
    Gene
     
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