: I would like to know the advantages of moving from: : a master-slave system using CollectionDistribution with all their .sh : scripts : http://wiki.apache.org/solr/CollectionDistribution : to: : use SolrReplication and his solrconfig.xml configuration. : http://wiki.apache.org/solr/SolrReplication
in addition to other comments posted it's important to keep in mind that one of the original motivations for the new style of replication was to have a 100% java based solution, as a result, it's is the only replication approach that works on windows. (in particular: it has no dependency on being able to delete hardlinks, or on running rsync, or on using ssh, or on having external crons, etc..) I still haven't had a chance to really kick the tires on the java based replication, so i have no real experience to base either of these claims on, but my hunch is that: 1) new users will find the java based replication *much* easier to get up an running (a lot less moving parts and external processes to deal with) 2) existing users who already have the script based replication working for them may find the java based replication less transparent and harder to maniplate in tricky ways. ...that second hunch comes from the fact that since the java replication is all self contained in solr, and doesn't use use all of hte various external processes (cron, rsync, snapshooter, snappuller, ssh, etc...) there are less places for people to manipulate the replication when doing atypical' operations ... for example: during a phased rollout of some new code/schema, you might disable all replication by shutting down the rsyncd port; then disabling it for a few slaves by commenting out the snappuller cron before turning rsyncd back on ... etc. these types of tricks are probably unneccessary in 90% of the use cases, and people who aren't use to being able to do them probably won't care, but if you are use to having that level of control, you might miss them. (but as i said: i haven't had a chance to try out the java replication at all, so for all i know it's just as tweakable and i'm just an idiot.) -Hoss
