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Kafka >> mail # user >> Best practices for changing partition numbers


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Re: Best practices for changing partition numbers
Yeah that makes sense, but what if we do need to change the number of
partitions? What if we need to reduce it?

On Tue, Jan 8, 2013 at 12:42 PM, Jun Rao <[EMAIL PROTECTED]> wrote:

> If you don't have a lot of topics, one thing you can do is to
> over-partition a topic.
>
> Also, in 0.7, # of partitions grows with brokers. This is going to change
> in 0.8, in which # of partitions is specified at topic creation time and
> won't change as brokers change. One needs to use an admin DDL to change #
> of partitions.
>
> Thanks,
>
> Jun
>
> On Mon, Jan 7, 2013 at 10:23 PM, David Ross <[EMAIL PROTECTED]> wrote:
>
> > Hello,
> >
> > We have found that, for our application, having a number of total
> > partitions as a multiple of the number of consumer hosts is beneficial.
> > Because of this, whenever we add or remove consumer hosts, we have to
> > change the number of partitions in the server config.
> >
> > What are best practices for changing the number of partitions? It seems
> > like adding partitions is fine but removing partitions would result in
> data
> > loss - am I right? Is that avoidable? Is it preferable to bring in new
> > servers with new partitions? Anything else I should keep in mind on this
> > issue?
> >
> >
> > Thanks!
> >
> > David
> >
>