Rockliffe Mailsite uses mdir
MS Exchange storage is not bad. Everything is stored in Jet Database. Rumors are MS
will be switching to SQL database in the future. All users's mailboxes are within one
huge DB file. But multiple DBs are possible, so some users could be on one DB and
another group of users on another DB - this helps control the size of the DB and speed
of backup/restore.
Exchange also uses single instance storage - if a message is sent to many people, only
one copy of message is actually stored in the DB file.
-----Original Message-----
From: Dev [mailto:[EMAIL PROTECTED]]
Sent: Sun 12/29/2002 8:59 PM
To: David Gregg
Cc:
Subject: Re[2]: [IMail Forum] Imail does not work with win2k
Hmmm...sounds like the old Unix mdir vs mbox debate. :)
Imail uses the equivalent of "mbox", where all messages
are stored concatenated in a single file. File locking
is a real issue. Disk storage requirements can be
greatly reduced, however.
Mdir stores every message as a separate file. It's
widely used on 'nix systems because it eliminates the
multiple access issues and file locking conflicts when
using NFS. (No more "message sequence has changed"
errors!) On the other hand, inboxes with hundreds or
thousands of small messages can chew up prodigious
amounts of disk space.
Properly optimized, either systems can give excellent
performance. But I too lean toward mdir because of the
many advantages not having to lock the entire mailbox
during writes.
Dev
--------------
Dev Anand MCSE,CCNA,A+
Network Manager
Biomorphic VLSI, Inc.
Westlake Village, CA 91362
dev_at_biomorphic_dot_com
pcpro_at_vcnet_dot_com
Sunday, December 29, 2002, 4:07:15 PM, you wrote:
DG> I agree... maybe this will change one day :)
>> I say that keeping all messages in one (text-based) MBX file is a pretty
DG> poor design.
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