Hello, I've got an additional question below:
> 1. What happens if data is modified in the Slave cluster? Is replication > one-way, so if I delete, change, or add something in the Slave cluster, the > Master cluster won't detect it and my changes will remain in the Slave > cluster > > until one sunny day the same data in the Master cluster changes and >replication > > overwrites my changes in the Slave cluster? > > 2. Is there a way to tell the replication "And now don't just send the edits > - > > replicate all data now and overwrite everything in the Slave cluster"? > > 3. What has to happen for Master and Slave cluster(s) to get out of sync? > > 4. Are people using this in production? 5. If one is adding replication on the *production* Master cluster, what's the worst thing that can happen to this Master cluster? Nothing scary other than changing configs + interruption during a restart? (which is currently still bad because of region assignments?) Thanks, Otis ----- Original Message ---- > From: Otis Gospodnetic <otis_gospodne...@yahoo.com> > To: user@hbase.apache.org > Sent: Wed, March 2, 2011 1:05:14 PM > Subject: Questions about HBase replication > > Hello, > > That http://hbase.apache.org/replication.html is informative, but I have > some > more Qs (that may end up qualifying as FAQs): > > 1. What happens if data is modified in the Slave cluster? Is replication > one-way, so if I delete, change, or add something in the Slave cluster, the > Master cluster won't detect it and my changes will remain in the Slave > cluster > > until one sunny day the same data in the Master cluster changes and >replication > > overwrites my changes in the Slave cluster? > > 2. Is there a way to tell the replication "And now don't just send the edits > - > > replicate all data now and overwrite everything in the Slave cluster"? > > 3. What has to happen for Master and Slave cluster(s) to get out of sync? > > 4. Are people using this in production? > > Thanks, > Otis > ---- > Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch > Lucene ecosystem search :: http://search-lucene.com/ > > > > ----- Original Message ---- > > From: Jean-Daniel Cryans <jdcry...@apache.org> > > To: user@hbase.apache.org > > Sent: Wed, March 2, 2011 12:12:13 PM > > Subject: Re: HBase replication documentation > > > > I think it's suppose to point there http://hbase.apache.org/replication.html > > > > J-D > > > > On Wed, Mar 2, 2011 at 8:50 AM, Otis Gospodnetic > > <otis_gospodne...@yahoo.com> wrote: > > > Hi, > > > > > > What's the best place to learn about HBase replication? > > > I found http://hbase.apache.org/book/cluster_replication.html , but note > how > > > there is only a link there, and that link points to a 404. > > > > > > Thanks, > > > Otis > > > ---- > > > Sematext :: http://sematext.com/ :: Solr - Lucene - Hadoop - HBase > > > Hadoop ecosystem search :: http://search-hadoop.com/ > > > > > > > > >
