Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
MapReduce >> mail # user >> what happens when a datanode rejoins?


Copy link to this message
-
Re: what happens when a datanode rejoins?
Yes the cluster will be re balanced.

On Tue, Sep 11, 2012 at 2:09 PM, mehul choube <[EMAIL PROTECTED]> wrote:

> Hi,
>
>
> What happens when an existing (not new) datanode rejoins a cluster for
> following scenarios:
>
>
> a) Some of the blocks it was managing are deleted/modified?
>
> b) The size of the blocks are now modified say from 64MB to 128MB?
>
> c) What if the block replication factor was one (yea not in most
> deployments but say in case) so does the namenode recreate a file once the
> datanode rejoins?
>
>
>
>
> Thanks,
>
> Mehul
>
>
>
--

Shashwat Shriparv
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB