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[HDFS-9388] Refactor decommission related code to support maintenance state for datanodes
...Lots of code can be shared between the existing decommission functionality and to-be-added maintenance state support for datanodes. To make it easier to add maintenance state support, let us...
, 2017-06-28, 02:04
[HDFS-9005] Provide configuration support for upgrade domain
...As part of the upgrade domain feature, we need to provide a mechanism to specify upgrade domain for each datanode. One way to accomplish that is to allow admins specify an upgrade domain scr...
, 2017-05-30, 06:36
[HDFS-9016] Display upgrade domain information in fsck
...This will make it easy for people to use fsck to check block placement when upgrade domain is enabled....
, 2017-05-30, 06:36
[HDFS-7541] Upgrade Domains in HDFS
...Current HDFS DN rolling upgrade step requires sequential DN restart to minimize the impact on data availability and read/write operations. The side effect is longer upgrade duration for larg...
, 2017-05-02, 20:24
[HDFS-8874] Add DN metrics for balancer and other block movement scenarios
...For balancer, mover and migrator (HDFS-8789), we want to know how close it is to the DN's throttling thresholds. Although DN has existing metrics such as BytesWritten, BytesRead, CopyBlockOp...
, 2017-03-30, 21:46
[HDFS-9392] Admins support for maintenance state
...This is to allow admins to put nodes into maintenance state with optional timeout value as well as take nodes out of maintenance state. Likely we will leverage what we come up in https://iss...
, 2017-03-08, 01:38
[HDFS-7877] Support maintenance state for datanodes
...This requirement came up during the design for HDFS-7541. Given this feature is mostly independent of upgrade domain feature, it is better to track it under a separate jira. The design and d...
, 2017-02-16, 01:37
[HDFS-8875] Optimize the wait time in Balancer for federation scenario
...Balancer has wait time between two consecutive iterations. That is to give some time for block movement to be fully committed ( return from replaceBlock doesn't mean the NN's blockmap has be...
, 2017-01-20, 18:44
[HDFS-8876] Make hard coded parameters used by balancer and other tools configurable
...During investigation of how to speed up balancer, at least to the level specified by dfs.datanode.balance.bandwidthPerSec, we found that parameters such as MAX_BLOCKS_SIZE_TO_FETCH and SOURC...
, 2017-01-20, 18:43
[HDFS-9391] Update webUI/JMX to display maintenance state info
, 2017-01-11, 05:00
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