Replication to more than one replica?

Per olof Ljungmark peo at
Fri Aug 10 04:55:31 EDT 2007

Rob Mueller wrote:
>> Disagree.  I am replicating one server to two and have been doing it 
>> for quite
>> a while with cyrus 2.3.
> Can you explain how you're doing this? If you're just running multiple 
> sync_clients with different config files that point to different replica 
> servers, then what you've got is broken because each sync_client will be 
> randomly grabbing different log files, so each replica will be only 
> getting half the required updates and will at any moment be randomly out 
> of sync with the master.
> The only way you can reliably make this work is.
> 1. Write a process that that like sync_client, regularly grabs and 
> atomically rotates the log files in the conf/log directory
> 2. That process then either:
> a) puts two copies of the log file in separate directories, and you have 
> two separate sync_client processes running in rolling mode picking up 
> the files in those directories, each sync_client with a different config 
> file pointing to the two different replica servers
> b) it runs a sync_client -f on the file twice, but with separate config 
> filess to each of the two different replica servers

Could you do it then with sync_client -S -u instead of -r to one of the 

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