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gloCalHelp.com commented on CASSANDRA-15200: -------------------------------------------- Dear sir Jeff, sorry ask here, I had thoughjt this is a very important function for cassandra, and I have maked this as an improvement. Anyway, where is the fast reply place for questions on cassandra? > Can a new adding node store other keyspaces' data and add permission of > one more machine failure for a replicator 2's keyspace in the new even number > nodes' DC? > ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > Key: CASSANDRA-15200 > URL: https://issues.apache.org/jira/browse/CASSANDRA-15200 > Project: Cassandra > Issue Type: Improvement > Reporter: gloCalHelp.com > Priority: Normal > > Question on adding a new node, replicator and how many machine failes? > Can a new adding node store other keyspaces' data and add permission of > one more machine failure for a replicator 2's keyspace in the new even number > nodes' DC? > Cassandra's designing of adding a new node for only a keyspace is > quite good for a high load keyspace and token allocation. But I have > aquestions: > 1st, if the high load keyspace has a replicator of only 2, and > original cluster has only 3 datanodes, if adding a new node to form a 4 > datanodes for this keyspace, then there will permit how many machine failes > for this 2 replicator keyspace's 4 data nodes center? > 2nd, on cassandra's official web, there is a line of : To use this > approach, the new node must be started with the JVM option > -Dcassandra.allocate_tokens_for_keyspace=<keyspace>, where <keyspace> is the > keyspace from which the algorithm can find the load information to optimize > token assignment for. > Does this mean that a new adding node can only store a keyspace's data? > > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org