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Colin Patrick McCabe
Tsz Wo Nicholas Sze
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[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...
, 2016-08-23, 18:16
[HDFS-9259] Make SO_SNDBUF size configurable at DFSClient side for hdfs write scenario
...We recently found that cross-DC hdfs write could be really slow. Further investigation identified that is due to SendBufferSize and ReceiveBufferSize used for hdfs write. The test ran "hadoo...
, 2016-07-28, 00:21
[HDFS-8940] Support for large-scale multi-tenant inotify service
...HDFS-6634 provides the core inotify functionality. We would like to extend that to provide a large-scale service that ten of thousands of clients can subscribe to....
, 2016-07-14, 23:01
[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...
, 2016-06-16, 05:13
[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....
, 2016-06-15, 03:47
[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...
, 2016-06-15, 03:41
[HDFS-9579] Provide bytes-read-by-network-distance metrics at FileSystem.Statistics level
...For cross DC distcp or other applications, it becomes useful to have insight as to the traffic volume for each network distance to distinguish cross-DC traffic, local-DC-remote-rack, etc.Fil...
, 2016-06-06, 02:40
[HDFS-10208] Addendum for HDFS-9579: to handle the case when client machine can't resolve network path
...If DFSClient runs on a machine that can't resolve network path, DNSToSwitchMapping will return DEFAULT_RACK. In addition, if somehow dnsToSwitchMapping.resolve returns null, that will cause ...
, 2016-05-17, 02:10
[HDFS-9389] Add maintenance states to AdminStates
...This jira will add ENTERING_MAINTENANCE and IN_MAINTENANCE to AdminStates and protobuf. It will also provide the basic functionality to transition DN into or out of maintenance state from DN...
, 2016-05-12, 22:54
[HDFS-3655] Datanode recoverRbw could hang sometime
...This bug seems to apply to 0.22 and hadoop 2.0. I will upload the initial fix done by my colleague Xiaobo Peng shortly ( there is some logistics issue being worked on so that he can upload p...
, 2016-05-06, 20:41
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