On Mon, May 20, 2013 at 3:54 PM, Jean-Daniel Cryans <[email protected]>wrote:
> On Mon, May 20, 2013 at 3:48 PM, Varun Sharma <[email protected]> wrote: > > Thanks JD for the response... I was just wondering if issues have ever > been > > seen with regards to moving over a large number of WAL(s) entirely from > one > > region server to another since that would double the replication related > > load on the one server which takes over. > > We only move the znodes, no data is actually being re-written. > Yes, but the region server now has 2X the number of WAL(s) to replicate and could suffer higher replication lag as a result... > > > > Another side question: After the WAL has been replicated - is it purged > > immediately or soonish from the zookeeper ? > > The WAL's znode reference is deleted immediately. The actual WAL will > be deleted according to the chain of log cleaners. > > J-D >
