Hight Aviability and Cyrus

Pascal Gienger Pascal.Gienger at uni-konstanz.de
Mon Nov 3 08:06:44 EST 2003

Earl R Shannon <ershanno at unity.ncsu.edu> wrote:

> Bonjour,
> While there have been a couple of mentions that high availability is
> being considered by CMU, it has not been done natively to the
> IMAP server. In other words, the IMAP server does not do high
> availability. While it does have the cluster implementation,
> ( the murder ) this allows scalability, not high availablity.

The only possible thing which can be setup in a timely doable manner is a 
failsafe cluster configuration. Use e.g. a little SAN Network with dual 
FC-Switches so that both computers forming the IMAP Cluster see the same 
partitions. Use some kind of cluster software to do it. Writing an agent 
for Veritas Cluster is not difficult, nor it is for the Linux HA project.

Doing this for parallel clusters is quite of lot of work, because you would 
have to keep much data in sync.


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