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Re: [Freeipa-devel] [PATCH] assign unique replica ID to all instances



Simo Sorce wrote:
On Wed, 2008-10-29 at 13:40 -0400, Rob Crittenden wrote:
Ensure that every replica gets a unique replication ID. Otherwise
changes won't propogate between all replicas.

I create a new entry, cn=replication, cn=etc, that will hold the next replication ID to assign. When a new replica is being created it requests this number, then increments it and writes it back.

This does leave some amount of exposure to a collision but I think
the risk is quite low. Creating replicas is a very uncommon activity.

Does it need to be a progressive number ?
If the integer is big enough we could also use a timestamp instead and
avoid having to keep track in tree ?

Simo.


It has to be an int between 0 and something like 65534.

rob


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