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 >> How do I recover the namenode?


Copy link to this message
-
Re: How do I recover the namenode?
This is not recommended.
You only backup the fsimage file, the data blocks, which are stored in
datanode, are not stored.
The chances may be if you removed some file after your fsimage backup,
those data blocks belonging to this file will be removed from all
datanodes; in this case, your namenode will report that blocks are missing;

1. Since you're using HA, lots of the editlogs are stored in the journal
node; the fsimage you have may not be exactly the one you want;

Regards,
*Stanley Shi,*

On Tue, Jul 8, 2014 at 8:12 AM, cho ju il <[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