[ https://issues.apache.org/jira/browse/HDFS-4990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz Wo (Nicholas), SZE updated HDFS-4990: ----------------------------------------- Attachment: h4990_20130918b.patch Junping, thanks for taking a look. h4990_20130918b.patch: addresses Junping's comment. > Block placement for storage types > --------------------------------- > > Key: HDFS-4990 > URL: https://issues.apache.org/jira/browse/HDFS-4990 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: namenode > Reporter: Suresh Srinivas > Assignee: Tsz Wo (Nicholas), SZE > Attachments: h4990_20130909.patch, h4990_20130916.patch, > h4990_20130917b.patch, h4990_20130917c.patch, h4990_20130917.patch, > h4990_20130918b.patch, h4990_20130918.patch > > > Currently block location for writes are made based on: > # Datanode load (number of transceivers) > # Space left on datanode > # Topology > With storage abstraction, namenode must choose a storage instead of a > datanode for block placement. It also needs to consider storage type, load on > the storage etc. > As an additional benefit, currently HDFS support heterogeneous nodes (nodes > with different number of spindles etc.) poorly. This work should help solve > that issue as well. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira