This worked, thanks.
On Thu, Nov 21, 2013 at 5:20 PM, Julien Campan <julien.cam...@gmail.com>wrote: > Hi, > > You said : Adjusted cassandra.yaml as above except that for seeds put both > server addresses > > If you put the new node into the seeds list, your node will not bootstrap. > This could explain why you see only the half of your data. > > Can you check in system.log ? > > > By the way, you can retry without adding the new server address in the > seeds list and normally should work :) > > You should add your new node into the seeds list only after the bootstrap > operation. > > > > Julien Campan > > > > > 2013/11/21 Tamar Rosen <ta...@correlor.com> > >> Hi, >> >> We are testing the process of adding a node to a cluster using a simple >> procedure, and seeing data loss. >> >> System: Ubuntu 12.04 on AWS >> Version: Cassandra + dsc 1.2.10 >> >> Here is what we did: >> Created 2 new m1.large instances >> Installed Java >> Installed Cassandra 1.2.10 (the version we are using in our production >> system) >> >> In server1: >> Adjusted cassandra.yaml >> comment out the initial_token >> uncomment num_tokens: 256 >> changed "seeds" to the address of this server >> changed listen_address to the address of this server >> changed rpc_address to 0.0.0.0 >> changed practitioner to org.apache.cassandra.dht.RandomPartitioner >> made sure cassandra is not running >> sudo rm -rf /var/lib/cassandra/* >> started cassandra >> connected via cqlsh >> Created a new keyspace with replication factor 1 >> Created a new table >> Populated the table with 4000 row of simple data using cql copy command >> cqlsh> select count(*) - returns 4000 >> nodetool status shows a single server at this point (using vnodes) >> >> In server2: >> made sure cassandra is not running >> sudo rm -rf /var/lib/cassandra/* >> Adjusted cassandra.yaml as above except that for seeds put both server >> addresses >> started cassandra >> waited a couple of min >> >> What we found: >> nodetool status on either server shows two servers, each with appox 50% >> (but not exactly) >> cqlsh>select count(*) - return 1870 (on either server) >> This process was repeated 3 times. each time the number was a bit >> different, but ~2000 >> >> Notes >> Replication factor is 1. >> No nodetool cleanup was run >> >> We have successfully added nodes in the past, but not since we moved to >> using vnodes >> THIS WAS A TEST. CLEAN MACHINES, SIMPLE DATA - What are we doing wrong? >> >> Thanks, >> >> Tamar Rosen >> Senior Data Architect >> Correlor.com >> >> >> >> >> >> >> > >
