cassandra: 2.1.7
java driver: datastax java driver 2.1.6
Here is the problem:
My application uses 2000+ keyspaces, and will dynamically create
keyspaces and tables. And then in java client, the
Metadata.tokenMap.tokenToHost would use about 1g memory. so this will cause
a lot of full gc.
As I see, the key of the tokenToHost is keyspace, and the value is a
tokenId_to_replicateNodes map.
When I try to solve this problem, I find something not sure: all
keyspaces have same 'tokenId_to_replicateNodes' map.
My replication strategy of all keyspaces is : simpleStrategy and
replicationFactor is 3
So would it be possible if keyspaces use same strategy, the value of
tokenToHost map use a same map. So it would extremely reduce the memory
usage
thanks a lot
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Joseph Gao
PhoneNum:15210513582
QQ: 409343351
