Reg Cassandra load balance

[Thamizh <tc...@yahoo.co.in>]

Hi All,
I am using Cassandra-0.7.8 on cluster of 4 machines. I have uploaded some files using Map/Reduce.
It looks files got distributed only among 2 nodes. When I used RF=3 it had got distributed to equally 4 nodes on below configuration.

Here are some config info's:

1. ByteOrderedPartitioner
2. Replication Factor = 1 (since, I have storage issue & RF will be increased later )
3. initial token - value has not been set.
4. create keyspace ipinfo with replication_factor = 1 and placement_strategy = 'org.apache.cassandra.locator.SimpleStrategy';

[cassandra@cassandra01 apache-cassandra-0.7.8]$ bin/nodetool -h 172.27.10.131 ring
Address         Status State   Load            Owns    Token                                       
                                                       Token(bytes[fddfd9bae90f0836cd9bff20b27e3c04])
172.27.10.132   Up     Normal  11.92 GB        25.00%  Token(bytes[3ddfd9bae90f0836cd9bff20b27e3c04])
172.27.15.80    Up     Normal  10.21 GB        25.00%  Token(bytes[7ddfd9bae90f0836cd9bff20b27e3c04])
172.27.10.131   Up     Normal  54.34 KB        25.00%  Token(bytes[bddfd9bae90f0836cd9bff20b27e3c04])
172.27.15.78    Up     Normal  58.79 KB        25.00%  Token(bytes[fddfd9bae90f0836cd9bff20b27e3c04])


Can you suggest me how shall I make load balance on my cluster.

Regards,
Thamizhannal

Re: Reg Cassandra load balance

[Radim Kolar <hs...@sendmail.cz>]

switch to random (hash) partitioner

OR

move tokens from your empty nodes into different position in ring; split 
your full nodes in half.  ring will then look like: owns 14% 14% 14% 
rest of ring.