[ http://issues.apache.org/jira/browse/HADOOP-803?page=comments#action_12458693 ] Raghu Angadi commented on HADOOP-803: -------------------------------------
This patch does not. I was wondering about this. No where in the code do we check or enforce that lengths reported by datanodes are same. For e.g. when a file is closed all the blocks for the file use the length reported by first data node in that has that block. This patch does not change that behavior. Block length is rarely considered. > Reducing memory consumption on Namenode : Part 1 > ------------------------------------------------ > > Key: HADOOP-803 > URL: http://issues.apache.org/jira/browse/HADOOP-803 > Project: Hadoop > Issue Type: Bug > Reporter: Raghu Angadi > Assigned To: Raghu Angadi > Attachments: block-refs-2.patch, block-refs-3.patch > > > There appears to be some places in Namenode that allow reducing memory > consumption without intrusive code or feature changes. This bug is an initial > attempt making those changes. Please include your thoughts as well. > One change I am planning to make : > Currently one copy of each block exists for each of the replicas and one copy > for blockMap. I think they are all supposed to be same. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
