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Does 2GB file size limit affect non-PMail clients?

Last post 01-13-2019, 13:45 by Joerg. 3 replies.
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  •  01-10-2019, 1:46

    • Brian Fluet is not online. Last active: 05-16-2019, 15:30 Brian Fluet
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    Does 2GB file size limit affect non-PMail clients?

    We know about the 2GB file size limitation of folder files (.PMM files) from a Pegasus Mail standpoint but does this limit exist when access is via MercuryI by non-Pmail clients?
  •  01-10-2019, 2:56

    • Rolf Lindby is not online. Last active: 2019-05-19, 12:50 Rolf Lindby
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    Re: Does 2GB file size limit affect non-PMail clients?

    It applies to folders handled by Mercury as well. David commented it this way some time ago: "The largest folder that any of my programs can currently *manage* is 2GB, but because of the way they're manipulated, it's often quite possible for the file itself to continue having messages *added* to them once they exceed this limit. This is one of the things I have addressed in MailStore - legacy folders can no longer be expanded past the limit, and v5 folders using SQLite can be of any practical size and hold any practical number of messages."

     

  •  01-10-2019, 3:28

    • Brian Fluet is not online. Last active: 05-16-2019, 15:30 Brian Fluet
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    Re: Does 2GB file size limit affect non-PMail clients?

    Here's an interesting question.  Consider someone running Mercury with its IMAP module providing access to the mailboxes by non-PMail clients.  One of the folder files hits the 2 GB limit and can not be accessed.  A known solution is to use the Pegasus Mail Notsplit utility to generate message files from the .PMM for re-integration back into Pegasus Mail folders but what could the approach be when Pegasus Mail is not in the picture?  An obvious answer of placing the .cnm files into a mailbox directory isn't practical when there's hundreds if not thousands of them. 

  •  01-13-2019, 13:45

    • Joerg is not online. Last active: 05-09-2019, 16:51 Joerg
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    AW: Re: Does 2GB file size limit affect non-PMail clients?

    Brian Fluet:
    ... A known solution is to use the Pegasus Mail Notsplit utility to generate message files from the .PMM for re-integration back into Pegasus Mail folders but what could the approach be when Pegasus Mail is not in the picture?  An obvious answer of placing the .cnm files into a mailbox directory isn't practical when there's hundreds if not thousands of them.

    I believe in that case you've got a problem. Also in case your server (where Mercury is running) or your accessing client is a 64bit system, any IMAP client wouldn't access the mailbox directly but always via the 32bit Mercury-I. And 32bit software can address max 2GB of RAM (except some special cases of 32 bit software which is able to address up to 4 GB). Don't know whether other (64bit) IMAP server are able to access Mercury/Pmail mailboxes? Maybe someone has tested it already?
    I regularly check the mailboxes of my users and carry out a search for files larger than 1 GB. If I find something, the user get a message to remove big attachments or to create a new mail folder to avoid a further increasing.

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