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From Yonik Seeley <>
Subject Re: Proposal about Version API "relaxation"
Date Thu, 15 Apr 2010 13:49:07 GMT
On Thu, Apr 15, 2010 at 9:39 AM, Earwin Burrfoot <> wrote:
> On Thu, Apr 15, 2010 at 17:17, Yonik Seeley <> wrote:
>> Seamless online upgrades have their place too... say you are upgrading
>> one server at a time in a cluster.
> Nothing here that can't be solved with an upgrade tool. Down one
> server, upgrade index, upgrade sofware, up.

It's still harder.  Consider a common scenario where you have one
master and the index being replicated to multiple slaves.  One would
need to stop replication to an upgraded slave until the master is also
upgraded.  Some people can't even stop replication because they use
something like a SAN to share the index.

I'm just pointing out that there is a lot of value for many people to
back compatible indexes... I'm not trying to make any points about
when that back combat should be broken.

Apache Lucene Eurocon 2010
18-21 May 2010 | Prague

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