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 >> rack awareness and safemode


Copy link to this message
-
rack awareness and safemode
Hadoopers!!

I am going to restart hadoop cluster in order to enable rack-awareness
first time.
Currently we're running 0.20.203 with 500TB of data on 250+ nodes
(without rack-awareness)

I am thinking and afraid that when i start dfs (with rack-awareness
enable) the HDFS will be in safemode for hours
busy with relocating block to comply with rack-awareness.

Anything knob i can dial to prevent that ?

Thanks in advances
Patai
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