Re: Data Replication

2016-10-13 Thread Josh Elser
I'm not familiar with MongoDB. Perhaps someone else can confirm this for you. Yamini Joshi wrote: 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 rega

Re: Data Replication

2016-10-13 Thread Yamini Joshi
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 wrote: > The Accumulo (Data Center)

Re: Data Replication

2016-10-13 Thread Josh Elser
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

Data Replication

2016-10-13 Thread Yamini Joshi
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 t

Re: Lost tablet server lock..SESSION_EXPIRED

2016-10-13 Thread Noe Detore
Yes, seeing a lot of DEBUG:Upsess. Also seeing [server.GarbageCollectionLogger] DEBUG: gc ParNew=64.69(+1.24) secs ConcurrentMarkSweep=102.51(+0.06) secs freemem=4,844,821,808(-20,292,780,896) totalmem=25,525,551,104 2016-10-13 11:22:17,963 [zookeeper.ZooLock] DEBUG: event null None Disconnected

Re: How can I remove or fix a hanging droptable in Accumulo?

2016-10-13 Thread Michael Wall
Jeff, This is the bug I ran into, https://issues.apache.org/jira/browse/ACCUMULO-4143. Looks like it was around migrations instead of splitting. Mike On Wed, Oct 12, 2016 at 8:27 PM, Michael Wall wrote: > Jeff, > > There was a race condition around splitting I think, but I can't find the > is