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Colin Patrick McCabe
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[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....
, 2016-06-23, 06:37
[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
[HDFS-7269] NN and DN don't check whether corrupted blocks reported by clients are actually corrupted
...We had a case where the client machine had memory issue and thus failed the checksum validation of a given block for all its replicas. So the client ended up informing NN about the corrupted...
, 2016-04-29, 03:34
[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...
, 2016-04-28, 01:00
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