DOCUMENT:Q96841  09-NOV-1999  [macmail]
TITLE   :Mac LDF: Local Mail File Compression
PRODUCT :Microsoft Mail For Appletalk Networks
PROD/VER:WINDOWS:3.1
OPER/SYS:
KEYWORDS:

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Mail for AppleTalk Networks, version 3.1 
-------------------------------------------------------------------------------

SUMMARY
=======

Version 3.1 of Microsoft Mail for AppleTalk Networks includes a feature that
allows users to store mail in local folders. Mail stored in local folders is
actually written to a local mail file which resides in the System
Folder:Preferences:MS Mail Local Folders on the local hard disk. A local mail
file is created for each user who logs into Mail from a particular machine and
is named after the Mail user.

MORE INFORMATION
================

When this file is not in use by Mail to save or read messages, the local mail
file is in a state of compression. In Mail 3.1, the compression occurs whenever
there is empty space in the local mail file. Version 3.1 of the workstation
software checks the file approximately every 15 seconds for space to compress.
This can result in problems for PowerBook users, because the consistent disk
access does not allow the machine to "sleep." This problem was addressed through
a new compression routine introduced in Mail 3.1a.

Mail 3.1a only performs the compression routine when the local mail file is
accessed to save or read a message. Therefore, with Mail 3.1a, compression is
not occurring as a background process and will allow PowerBooks to "sleep."


Additional query words: 3.10 disk accessing

======================================================================
Keywords          :  
Technology        : kbMailSearch kbZNotKeyword3 kbMailATN310
Version           : WINDOWS:3.1

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 1999.