Repository: storm Updated Branches: refs/heads/asf-site 1b2d1d6f3 -> 23799a9f2
Update doc for rebalance command Project: http://git-wip-us.apache.org/repos/asf/storm/repo Commit: http://git-wip-us.apache.org/repos/asf/storm/commit/e9eb307d Tree: http://git-wip-us.apache.org/repos/asf/storm/tree/e9eb307d Diff: http://git-wip-us.apache.org/repos/asf/storm/diff/e9eb307d Branch: refs/heads/asf-site Commit: e9eb307dac90a4fae40113235a006ffb2e81d383 Parents: ef7428d Author: Julien Nioche <[email protected]> Authored: Sat Feb 20 21:10:48 2016 +0000 Committer: Julien Nioche <[email protected]> Committed: Sat Feb 20 21:10:48 2016 +0000 ---------------------------------------------------------------------- documentation/Command-line-client.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/storm/blob/e9eb307d/documentation/Command-line-client.md ---------------------------------------------------------------------- diff --git a/documentation/Command-line-client.md b/documentation/Command-line-client.md index 2800411..9cd5fd6 100644 --- a/documentation/Command-line-client.md +++ b/documentation/Command-line-client.md @@ -47,12 +47,14 @@ Deactivates the specified topology's spouts. ### rebalance -Syntax: `storm rebalance topology-name [-w wait-time-secs]` +Syntax: `storm rebalance topology-name [-w wait-time-secs] [-n new-num-workers] [-e component=parallelism]*` Sometimes you may wish to spread out where the workers for a topology are running. For example, let's say you have a 10 node cluster running 4 workers per node, and then let's say you add another 10 nodes to the cluster. You may wish to have Storm spread out the workers for the running topology so that each node runs 2 workers. One way to do this is to kill the topology and resubmit it, but Storm provides a "rebalance" command that provides an easier way to do this. Rebalance will first deactivate the topology for the duration of the message timeout (overridable with the -w flag) and then redistribute the workers evenly around the cluster. The topology will then return to its previous state of activation (so a deactivated topology will still be deactivated and an activated topology will go back to being activated). +The rebalance command can also be used to change the parallelism of a running topology. Use the -n and -e switches to change the number of workers or number of executors of a component respectively. + ### repl Syntax: `storm repl`
