So, can I say that if I have a table split across nodes (i.e. num tablets > 1) and HDFS replication in my system, it is sort of equivalent to a sharded and replicated mongo architecture?
Best regards, Yamini Joshi On Thu, Oct 13, 2016 at 11:06 AM, Josh Elser <josh.el...@gmail.com> wrote: > The Accumulo (Data Center) Replication feature is for having multiple > active Accumulo clusters all containing the same data. > > HDFS provides replication as a means for durability of the data it is > storing. The files that Accumulo creates on one HDFS instance are > replicated by HDFS. This does not help if your entire cluster become > unavailable. That is what the data center replication Accumulo feature > solves. > > While both can be called "replication", they serve very different purposes. > > > Yamini Joshi wrote: > >> Hello >> >> I was going through some Accumulo docs and found out about replication. >> To enable replication,one needs to make some config settings as >> described in >> https://github.com/apache/accumulo/blob/master/docs/src/main >> /asciidoc/chapters/replication.txt. >> I cannot seem to grasp the difference between this replication conf and >> the replication on HDFS level. What exactly is the use case for >> replication? Are the replicated instances visible to the clients? >> >> Best regards, >> Yamini Joshi >> >