On Wed, 18 Apr 2007, Eric Luyten wrote:
Cyrus 2.2.13 on a Solaris 9 server
4 Cyrus spool partitions, 350 GB each, nearing 80% occupation
(Hashing performed on first letter basis of account name)
I have two extra 350 GB partitions ready and 'partition' lines
already added to /etc/imapd.conf
To spread out the mail data over six partitions I would need
to move about 350 GB of mail.
Two scenarios :
a) use rename_mailbox in cyradm
pro : mail server can keep on running
cons : filesystem metadata changes
no 'batching' method available (suggestions, anyone ?)
slow
b) use 'cp -p -r', update a text dump of mailboxes.db and regenerate
pros : filesystem metadata does not change
easily batchable
significantly faster than method a)
con : mail server must be halted for (at least) several hours
Am I overlooking important issues here ?
I would use method "a". You can easily do the moves in batch using a perl
script. Here is a simple perl function we use to move users between
murder backends:
----------------------------------------------------------------
##########################
# Move a mailbox between backends
##########################
sub move_backend {
my ($server, $authuser, $authpw, $mailbox, $newbe) = @_;
use Mail::IMAPClient;
# Connect to Cyrus
my $imap = Mail::IMAPClient->new(
Server => $server,
User => $authuser,
Password => $authpw
);
if (! $imap) {
return "Cannot connect to mail server '$server' - $!";
}
# Make sure the mailbox exists
if (! $imap->list($mailbox)) {
return "Error: Mailbox '$mailbox' not found.";
}
my @results = $imap->tag_and_run(qq/RENAME $mailbox $mailbox $newbe/);
$imap->logout;
foreach my $r (@results) {
$r =~ s/\r//g;
$r =~ s/\n//g;
if ($r =~ / NO (.*)/) {
return "Error: Rename of mailbox '$mailbox' failed
- $1";
}
}
return "Success";
}
----------------------------------------------------------------
In a non-Murder environment, the third argument ($newbe) would be the
partition instead.
Also, what does "cons : filesystem metadata changes" mean?
Andy
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