Thanks a lot. So the ‘strategy’ change may not be seen by all nodes when the ‘upgrade keyspace …’ command returns and I can use ’describe cluster’ to check if the change has taken effect on all nodes right?
From: Rahul Neelakantan [mailto:ra...@rahul.be] Sent: 2014年8月5日 18:46 To: user@cassandra.apache.org Subject: Re: A question about using 'update keyspace with strategyoptions' command Try running "describe cluster" from Cassandra-CLI to see if all nodes have the same schema version. Rahul Neelakantan On Aug 5, 2014, at 6:13 AM, Sylvain Lebresne <sylv...@datastax.com<mailto:sylv...@datastax.com>> wrote: On Tue, Aug 5, 2014 at 11:40 AM, Lu, Boying <boying...@emc.com<mailto:boying...@emc.com>> wrote: What I want to know is “are the strategy changed ?’ after the ‘udpate keyspace with strategy_options…’ command returns successfully Like all schema changes, not necessarily on all nodes. You will have to check for schema agreement between nodes. Not the data change. e.g. say I run the command ‘update keyspace with strategy_opitons [dc1: 3, dc2:3]’ , when this command returns, are the strategy options already changed? Or I need to wait some time for the strategy to be changed? From: Sylvain Lebresne [mailto:sylv...@datastax.com<mailto:sylv...@datastax.com>] Sent: 2014年8月5日 16:59 To: user@cassandra.apache.org<mailto:user@cassandra.apache.org> Subject: Re: A question about using 'update keyspace with strategyoptions' command Changing the strategy options, and in particular the replication factor, does not perform any data replication by itself. You need to run a repair to ensure data is replicated following the new replication. On Tue, Aug 5, 2014 at 10:52 AM, Lu, Boying <boying...@emc.com<mailto:boying...@emc.com>> wrote: Thanks. yes. I can use the ‘show keyspace’ command to check and see the strategy does changed. But what I want to know is if the ‘update keyspace with strategy_options …’ command is a ‘sync’ operation or a ‘async’ operation. From: Rahul Menon [mailto:ra...@apigee.com<mailto:ra...@apigee.com>] Sent: 2014年8月5日 16:38 To: user Subject: Re: A question about using 'update keyspace with strategyoptions' command Try the show keyspaces command and look for "Options" under each keyspace. Thanks Rahul On Tue, Aug 5, 2014 at 2:01 PM, Lu, Boying <boying...@emc.com<mailto:boying...@emc.com>> wrote: Hi, All, I want to run ‘update keyspace with strategy_options={dc1:3, dc2:3}’ from cassandra-cli to update the strategy options of some keyspace in a multi-DC environment. When the command returns successfully, does it mean that the strategy options have been updated successfully or I need to wait some time for the change to be propagated to all DCs? Thanks Boying
