On Mon, Mar 1, 2010 at 3:18 PM, Jon Graham <sjclou...@gmail.com> wrote: > Thanks Jonathan. > > It seems like the load balance operation isn't moving. I haven't seen any > data file time changes in 2 hours and no location file time > changes in over an hour. > > I can see a tcp port # 7000 opened on the node where I ran the loadbalance > command. It is connected to > port 39033 on the node receiving the data. The CPU usage on both systems is > very low. There are about 10 > million records on the node where the load balance command was issued.
Did you check logs for exceptions? > My six node Cassandra ring consists of tokens for nodes 1-6 of: 0 > (ascii 0x30) 6 B H O (the letter O) T > > The load balance target node initially had a token of 'H' (using ordered > partitioning). The source node has a key of 0 (ascii 0x30). Most of the data > on the source node has keys starting with '/'. Slash falls between tokens T > and 0 in my ring so most of the data landed on the node with token 0 with > replicas on the next 2 nodes. My token space is badly divided for the data I > have already inserted. > > Does the initial token value of the load balance target node selected by > Cassandra need to be cleared or set to a specific value before hand to > accomodate the load balance data transfer? No. > Would I have better luck decommissioning nodes 4,5,6 and trying to > bootstrapping these nodes one at a time > with better initial token values? LoadBalance is basically sugar for decommission + bootstrap, so no. > I am looking for a good way to move/split/re-balance data from nodes 1,2,3 > to nodes 4, 5, 6 while achiving a better token space distribution. I would upgrade to the 0.6 beta and try loadbalance again. -Jonathan
