I am using Cassandra 1.0.2, have a 3 nodes cluster. the consistency level
of read & write are both QUORUM.
At first the RF=1, and I figured that one node down will cause the cluster
unusable. so I changed RF to 2, and run nodetool repair on every
node(actually I did it twice).
After the operation I think my data should be in at least two nodes, and it
would be okay if one of them is down.
But when I tried to simulate the failure, by disablegossip of one node, and
the cluster knows this node is down. then access data from the cluster, it
returned "MaximumRetryException"(pycassa). as my experiences this is
caused by "UnavailableException", which is means the data it is requesting
is on a node which is down.
so I wonder my data might not be replicated right, what should I do? thanks
for the help!
here is the keyspace info:
*
*
*Keyspace: comments:*
* Replication Strategy: org.apache.cassandra.locator.SimpleStrategy*
* Durable Writes: true*
* Options: [replication_factor:2]*
the scheme version is okay:
*[default@unknown] describe cluster;*
*Cluster Information:*
* Snitch: org.apache.cassandra.locator.SimpleSnitch*
* Partitioner: org.apache.cassandra.dht.RandomPartitioner*
* Schema versions: *
* f67d0d50-b923-11e1-0000-4f7cf9240aef: [192.168.1.129, 192.168.1.40,
192.168.1.50]*
the loads are as below:
*nodetool -h localhost ring*
*Address DC Rack Status State Load
Owns Token *
*
113427455640312821154458202477256070484 *
*192.168.1.50 datacenter1 rack1 Up Normal 28.77 GB
33.33% 0 *
*192.168.1.40 datacenter1 rack1 Up Normal 26.67 GB
33.33% 56713727820156410577229101238628035242 *
*192.168.1.129 datacenter1 rack1 Up Normal 33.25 GB
33.33% 113427455640312821154458202477256070484 *
