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[HDFS-2006] ability to support storing extended attributes per file
...It would be nice if HDFS provides a feature to store extended attributes for files, similar to the one described here: http://en.wikipedia.org/wiki/Extended_file_attributes. The challenge is...
, 2014-08-15, 06:41
[HDFS-1366] reduce namenode startup time by optimising checkBlockInfo while loading fsimage
...The namenode spends about 10 minutes reading in a 14 GB fsimage file into memory and creating all the in-memory data structures. A jstack based debugger clearly shows that most of the time d...
, 2014-07-31, 00:48
[HDFS-1179] Implement a file change log
...The File Change Log (FCL) is a construct that records all metadata changes in a file system (http://en.wikipedia.org/wiki/File_change_log). This JIRA is to discuss various high-level approac...
, 2014-07-30, 20:48
[HDFS-1094] Intelligent block placement policy to decrease probability of block loss
...The current HDFS implementation specifies that the first replica is local and the other two replicas are on any two random nodes on a random remote rack. This means that if any three datanod...
, 2014-07-30, 18:42
[HDFS-385] Design a pluggable interface to place replicas of blocks in HDFS
...The current HDFS code typically places one replica on local rack, the second replica on remote random rack and the third replica on a random node of that remote rack. This algorithm is baked...
, 2014-07-30, 18:42
[HDFS-289] HDFS should blacklist datanodes that are not performing well
...On a large cluster, a few datanodes could be under-performing. There were cases when the network connectivity of a few of these bad datanodes were degraded, resulting in long long times (in ...
, 2014-07-30, 09:09
[HDFS-269] Implement seek for HftpFileSystem
...Support seek in the HftpFileSystem. This is useful for a host of applications that need to access data from a hadoop cluster running a different version of hadoop....
, 2014-07-22, 20:53
[HDFS-220] Transparent archival and restore of files from HDFS
...There should be a facility to migrate old files away from a production cluster. Access to those files from applications should continue to work transparently, without changing application co...
, 2014-07-18, 23:45
[HDFS-134] premature end-of-decommission of datanodes
...Decommissioning requires that the nodes be listed in the dfs.hosts.excludes file. The administrator runs the "dfsadmin -refreshNodes" command. The decommissioning process starts off. Suppose...
, 2014-07-18, 06:19
[HDFS-24] FSDataOutputStream should flush last partial CRC chunk
...The FSDataOutputSteam.flush() api is supposed to flush all data to the underlying stream. However, for LocalFileSystem, the flush APi does not flush the last partial CRC chunk.One solution i...
, 2014-07-17, 22:17
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