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
Hadoop >> mail # user >> Replace a block with a new one


Copy link to this message
-
Re: Replace a block with a new one
I wrote my answer thinking about the XOR implementation. With reed-solomon
and single replication, the cases that need to be considered are indeed
smaller, simpler.

It seems I was wrong about my last statement though. If the machine hosting
a single-replicated block is lost, it isn't likely that the block can't be
reconstructed from a summary of the data. But with a RAID6 strategy / RS,
its is indeed possible but of course up to a certain number of blocks.

There clearly is a case for such tool on a Hadoop cluster.

Bertrand Dechoux
On Mon, Jul 21, 2014 at 2:35 PM, Zesheng Wu <[EMAIL PROTECTED]> wrote:
 
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