On 9/27/2017 5:14 PM, st...@greengecko.co.nz wrote:
In this situation NFS is more of a delivery method than anything to do with
high availability, as it has no requirement to do any more than share a single
copy of the data.
Maybe a clustered file system - glusterfs for example - is what you're looking
for.
We are huge GlusterFS fans. It is easy to setup, trivial to admin and
very reliable if you don't get too fancy. Biggest issue is 'growing' it
as you have to be precise in how you add additional bricks.
However, historically the small-file performance on Gluster has not been
very good, though they are working on it.
Thus a Maildir based system would not (yet) be a good fit on Gluster,
especially with lots of customers who leave tens of thousands of
individual messages in a particular Folder.
Other OpenSource 'white box' HA options are
1) Ceph
2) MooseFS/LizardFS
3) A big NFS server with DRBD as a failover.
Each of those would have its challenges as you get into the millions of
busy accounts stage, but there are work arounds for each.
William Kern
_______________________________________________
mailop mailing list
mailop@mailop.org
https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
