The tool you are looking for is described here - https://cwiki.apache.org/confluence/display/KAFKA/Replication+tools#Replicationtools-5.AddPartitionCommandTool .
Please note that this tool can only increase the number of partitions for a topic, there is no tool to reduce the number of partitions yet. Thanks, Neha On Wed, Aug 28, 2013 at 9:54 AM, Rajasekar Elango <rela...@salesforce.com>wrote: > Hi Neha, > > If we set auto.create.topics.enable = true and update num.partitions. New > topic get right number of partitions. But existing topics continue to use > whatever num.partitions set before. I am asking about the tool that allow > existing topic to use updated number of partitions. > > Thanks, > Raja. > > > On Wed, Aug 28, 2013 at 12:38 PM, Neha Narkhede <neha.narkh...@gmail.com > >wrote: > > > Hi Rajasekar, > > > > I'm not sure I fully understood your question. Are you asking about a > tool > > that can increase the number of partitions for a topic? > > > > Thanks, > > Neha > > > > > > On Wed, Aug 28, 2013 at 8:47 AM, Rajasekar Elango < > rela...@salesforce.com > > >wrote: > > > > > Hi Jun, > > > > > > It's been some time since you last post, is this patch available now. > > Also > > > we are doing following manual steps to update existing topic to use new > > > partitions. > > > > > > 1) stop all zookeepers > > > 2) stop all kafka brokers > > > 3) clean data dir or zookeepers and kafka > > > 4) start zookeepers and kafka. > > > > > > This involves both downtime and loosing data. Is there a better way to > > > update existing topics to use new partitions until patch is > available..? > > > > > > -- > > > Thanks, > > > Raja. > > > > > > > > > -- > Thanks, > Raja. >
