very large mailboxes backup, long retention period deleted also

[Andre Felipe Machado]

Hello,
Are there new suggestions of backup strategies for many very large mailboxes
(many GB and growing), with up to decades long retention period for deleted
messages also?

I searched the list archives and found the 2009 and 2010 threads interesting,
but then proposed solutions may not scale to today and future needs.

Guess that some form of tape archiving may be needed for such long periods.

Our initial idea was to use some form of tiered storage, and decades of expunge
delay. But messages flagged as deleted could sum up to millions on each of such
large mailboxes years ahead, maybe causing dificulties with large directories
(stat from tape backup sw, squatter).
Will hashing mailboxes directories option help?
Is there a clean way to move messages marked as deleted to another partition?
http://en.wikipedia.org/wiki/Linear_Tape_File_System


Maybe, if cyrus becomes compatible with NFS, then HSM solutions like
http://www.openarchive.net could help.

Do you have suggestions for this scenario?



http://lists.andrew.cmu.edu/pipermail/info-cyrus/2002-November/017188.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2003-June/012997.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2005-September/019624.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2005-November/020218.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2009-January/030348.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2009-January/030356.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2010-February/032524.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2010-February/032533.html
http://lists.andrew.cmu.edu/pipermail/info-cyrus/2011-February/034500.html


Regards.
Andre Felipe Machado
http://www.techforce.com.br