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[HDFS-4308] addBlock() should persist file blocks once - HDFS - [issue]
...FSNamesystem.getAdditionalBlock() persists all file blocks twice, first in dir.removeBlock() using OP_ADD, then immediately after that in dir.persistBlocks() using OP_UPDATE_BLOCKS.This shou...
http://issues.apache.org/jira/browse/HDFS-4308    Author: Konstantin Shvachko, 2012-12-29, 14:05
[HDFS-4231] Introduce HAState for BackupNode - HDFS - [issue]
...Introduce BNHAState backed up by existing BNHAContext....
http://issues.apache.org/jira/browse/HDFS-4231    Author: Konstantin Shvachko, 2012-12-03, 14:07
[HDFS-4179] BackupNode: allow reads, fix checkpointing, safeMode - HDFS - [issue]
...BackupNode should be allowed to accept read command. Needs some adjustments in checkpointing and with safe mode....
http://issues.apache.org/jira/browse/HDFS-4179    Author: Konstantin Shvachko, 2012-11-20, 13:21
[HDFS-2064] Warm HA NameNode going Hot - HDFS - [issue]
...This is the design for automatic hot HA for HDFS NameNode. It involves use of HA software and LoadReplicator - external to Hadoop components, which substantially simplify the architecture by...
http://issues.apache.org/jira/browse/HDFS-2064    Author: Konstantin Shvachko, 2012-11-12, 20:16
[HDFS-2285] BackupNode should reject requests trying to modify namespace - HDFS - [issue]
...I am trying to remove file from BackupNode usinghadoop fs -fs hdfs://backup.node.com:50100 -rm /README.txtwhich is supposed to fail. But it seems to be hanging forever.Needs some investigati...
http://issues.apache.org/jira/browse/HDFS-2285    Author: Konstantin Shvachko, 2012-09-07, 22:02
[HDFS-708] A stress-test tool for HDFS. - HDFS - [issue]
...It would be good to have a tool for automatic stress testing HDFS, which would provide IO-intensive load on HDFS cluster.The idea is to start the tool, let it run overnight, and then be able...
http://issues.apache.org/jira/browse/HDFS-708    Author: Konstantin Shvachko, 2012-08-01, 08:00
[HDFS-3368] Missing blocks due to bad DataNodes coming up and down. - HDFS - [issue]
...All replicas of a block can be removed if bad DataNodes come up and down during cluster restart resulting in data loss....
http://issues.apache.org/jira/browse/HDFS-3368    Author: Konstantin Shvachko, 2012-07-19, 22:13
Re: Changing where HDFS stores its data - HDFS - [mail # user]
...In hdfs-site.xml you should specify dfs.namenode.name.dir for NameNode stoareg directories or / and dfs.datanode.data.dir for DataNode storage  Changing temporary directory location cha...
   Author: Konstantin Shvachko, 2012-06-19, 00:12
[HDFS-1107] Turn on append by default. - HDFS - [issue]
...hdfs-default.xml still has the old default value dfs.support.append = false. It should be changed to true, or removed from the default configuration and treated as true if not found....
http://issues.apache.org/jira/browse/HDFS-1107    Author: Konstantin Shvachko, 2012-06-17, 12:13
[HDFS-2290] Block with corrupt replica is not getting replicated - HDFS - [issue]
...A block has one replica marked as corrupt and two good ones. countNodes() correctly detects that there are only 2 live replicas, and fsck reports the block as under-replicated. But Replicati...
http://issues.apache.org/jira/browse/HDFS-2290    Author: Konstantin Shvachko, 2012-06-04, 17:30
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