Thanks Simon,<br>
this helped me a lot.<br>
I will now create 2 disk partitions (in an extended part I think) one
for configdirectory and one for partition-default and mount them to
their old loacions.<br>
I will use rsync -aH instead of cp<br>
<br>
btw I forgot to mention that this is a SUSE box (9.2, 2.6 kernel) where Reiser is the default FS.<br>
<br>
Cheers<br>
Thomas<br><br><div><span class="gmail_quote">2006/6/18, Simon Matter <<a href="mailto:simon.matter@ch.sauter-bc.com">simon.matter@ch.sauter-bc.com</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
> Hi,<br>> I am about to move my IMAP storage to a new harddisk (old HD gets too<br>> small<br>> and may fail in the near future).<br>> Cyrus serves a small group of people (about 5), running on old hardware
<br>> (PII,300) with a new 80GB IDE HD. No performance issues.<br>> I have several questions about details of the migration:<br>><br>> 1. a) FS-type: any recommendations (I would have used reiserfs, but ext3<br>
> or<br>> ext2 could be options as well)?<br><br>Okay, this lets us know that you are running Linux. I'm using XFS and ext3<br>and it seems that reiserfs also performs well with cyrus. I think you can<br>choose any of them, however not every FS is well integrated in any distro.
<br><br>> b) FS options: should I use specials options when generating the FS (there<br>> may be a lot of files in folders as we all know), eg inodes,...<br><br>I don't think you have to care about that for a small 80G cyrus message
<br>store. Of course that's something else in the multi Terabyte range...<br><br>> c) any mount-options I should use?<br>> FYI: the new harddisk will be mounted to /data and will have directories<br>> imap/part and imap/conf directories for the partition and configdir)
<br><br>I'm usually using noatime for /var/spool/imap with ext3.<br><br>><br>> 2. Which parts should I move:<br>> a) Of course I want to move the partition (partition-default, which ist<br>> /var/spool/imap currently)
<br>> b) I would like to move configdirectory (/var/lib/imap) as well - is the<br>> recommendable?<br>><br>> 3. How to do the migration<br>> I intended to<br>> - stop postfix and imapd<br>> - copy all files with "cp --preserve --recursive" to the new location (are
<br>> there links to be taken care of)?<br><br>Yes, there may be hardlinks when using single instance store, "rsync -aH"<br>is better anyway.<br><br>> - change /etc/imapd.conf regarding the two settings (partition-default and
<br>> configdirectory)<br><br>I don't suggest putting configdirectory and partition-default on the same<br>filesystem if you want to use noatime option.<br><br>> - start imapd and postfix again<br>> Will this work or is this not the preferred way to to it
<br><br>This will work but why not simply move the data to filesystems on the new<br>disk and then mount them to the old locations?<br><br>Simon<br></blockquote></div><br>