Hi, ----- Original Message ----
> If you're using the delta import handler the problem would seem to go > away because you can have two separate masters running at all times, > and if one fails, you can then point the slaves to the secondary > master, that is guaranteed to be in sync because it's been importing > from the same database? Oh, there is no DB involved. Think of a document stream continuously coming in, a component listening to that stream, grabbing docs, and pushing it to master(s). Otis > On Tue, Mar 8, 2011 at 8:45 PM, Otis Gospodnetic > <otis_gospodne...@yahoo.com> wrote: > > Hello, > > > > What are some common or good ways to handle indexing (master) fail-over? > > Imagine you have a continuous stream of incoming documents that you have to > > index without losing any of them (or with losing as few of them as >possible). > > How do you set up you masters? > > In other words, you can't just have 2 masters where the secondary is the > > Repeater (or Slave) of the primary master and replicates the index >periodically: > > you need to have 2 masters that are in sync at all times! > > How do you achieve that? > > > > * Do you just put N masters behind a LB VIP, configure them both to point > > to >the > > index on some shared storage (e.g. SAN), and count on the LB to fail-over > > to >the > > secondary master when the primary becomes unreachable? > > If so, how do you deal with index locks? You use the Native lock and > > count >on > > it disappearing when the primary master goes down? That means you count > > on >the > > whole JVM process dying, which may not be the case... > > > > * Or do you use tools like DRBD, Corosync, Pacemaker, etc. to keep 2 masters > > with 2 separate indices in sync, while making sure you write to only 1 of >them > > via LB VIP or otherwise? > > > > * Or ... > > > > > > This thread is on a similar topic, but is inconclusive: > > http://search-lucene.com/m/aOsyN15f1qd1 > > > > Here is another similar thread, but this one doesn't cover how 2 masters are > > kept in sync at all times: > > http://search-lucene.com/m/aOsyN15f1qd1 > > > > Thanks, > > Otis > > ---- > > Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch > > Lucene ecosystem search :: http://search-lucene.com/ > > > > >
