Hi Folks, Apart from below error everything went smooth as described, can you please help me solve the issues 1. In step 7 on running Code: /root/scripts/unison.sh I get error Code: Warning: No archive files were found for these roots, whose canonical names are: /var/www //server2//var/www This can happen either because this is the first time you have synchronized these roots, or because you have upgraded Unison to a new version with a different archive format. Update detection may take a while on this run if the replicas are large. Unison will assume that the 'last synchronized state' of both replicas was completely empty. This means that any files that are different will be reported as conflicts, and any files that exist only on one replica will be judged as new and propagated to the other replica. If the two replicas are identical, then no changes will be reported. If you see this message repeatedly, it may be because one of your machines is getting its address from DHCP, which is causing its host name to change between synchronizations. See the documentation for the UNISONLOCALHOSTNAME environment variable for advice on how to correct this. Donations to the Unison project are gratefully accepted: http://www.cis.upenn.edu/~bcpierce/unison 2. Step 8 describe to enable iterate_query in both the servers but in my servers it was already enabled so I found it a bit fishy can anyone explains how it was enabled when I haven't Server1 had this entry Code: iterate_query = SELECT email as user FROM mail_user WHERE server_id = '1' Server2 has this entry Code: iterate_query = SELECT email as user FROM mail_user WHERE server_id = '3' and one last question how do I link my domain to this cluster Code: I want my domain www.xyz.com as base and want nameservers to be ns1.xyz.com and ns2.xyz.com and host my second www.abc.com domain as a reseller and my third domain www.aaa.com as client to reseller (www.abc.com)