And while adding 2nd DC we have to make sure that, nodes along the ring should alternate data centers to avoid hot spots. As you explained in http://wiki.apache.org/cassandra/Operations
And that can be a tricky. Correct? Thanks, Sunil On Wed, Dec 9, 2009 at 7:06 PM, Jonathan Ellis <[email protected]> wrote: > It should work, but because of the way RAS works you need to have > equal nodes in DCs for it to be balanced. so, when you do decide to > add the 2nd DC, you should add as many nodes as you have in the first. > > On Wed, Dec 9, 2009 at 4:27 AM, Sunil Khedar <[email protected]> > wrote: > > "Replication strategy may not be changed without wiping your data and > > starting over." > > > > To start with I want to have all my nodes in a single DC. But over a time > of > > period, nodes will be placed in multiple DCs. In that is it safe to start > > using "RackAwareStrategy" even if nodes are in a single DC? So, that when > I > > start using multiple DCs, data wiping won't be required. > > > > -Sunil > > > > On Wed, Dec 9, 2009 at 4:27 AM, Jonathan Ellis <[email protected]> > wrote: > >> > >> On Tue, Dec 8, 2009 at 7:21 AM, Rakesh Sharma <[email protected]> wrote: > >> > f) Can I take backups from each node and merge them on a single node? > Or > >> > it's not at all required? > >> > >> All you would need to do would be to copy the snapshotted sstables > >> into the data directory on the target node, but I'm not sure why you > >> would want to do that. > >> > >> I wrote http://wiki.apache.org/cassandra/Operations to answer the > >> other questions in more detail. :) > >> > >> -Jonathan > > > > >
