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[HDFS-3051] A zero-copy ScatterGatherRead api from FSDataInputStream
...It will be nice if we can get a new API from FSDtaInputStream that allows for zero-copy read for hdfs readers....
, 2016-07-13, 07:38
[HDFS-2744] Extend FSDataInputStream to allow fadvise
...Now that we have direct reads from local HDFS block files (HDFS-2246), it might make sense to make FSDataInputStream support fadvise calls. I have an application (HBase) that would like to t...
, 2016-06-20, 10:14
[HDFS-350] DFSClient more robust if the namenode is busy doing GC
...In the current code, if the client (writer) encounters an RPC error while fetching a new block id from the namenode, it does not retry. It throws an exception to the application. This become...
, 2016-03-22, 21:30
[HDFS-1432] HDFS across data centers: HighTide
...There are many instances when the same piece of data resides on multiple HDFS clusters in different data centers. The primary reason being that the physical limitation of one data cent...
, 2015-09-15, 21:08
[HDFS-1605] Convert DFSInputStream synchronized sections to a ReadWrite lock
...Hbase does concurrent preads from multiple threads to different blocks of the same hdfs file. Each of these pread calls invoke DFSInputStream.getFileLength() and DFSInputStream.getBlockAt()....
, 2015-05-18, 12:17
[HDFS-487] HDFS should expose a fileid to uniquely identify a file
...HDFS should expose a id that uniquely identifies a file. This helps in developing applications that work correctly even when files are moved from one directory to another. A typical us...
, 2015-04-11, 00:07
[HDFS-1783] Ability for HDFS client to write replicas in parallel
...The current implementation of HDFS pipelines the writes to the three replicas. This introduces some latency for realtime latency sensitive applications. An alternate implementation that allo...
, 2015-03-13, 23:43
[HDFS-503] Implement erasure coding as a layer on HDFS
...The goal of this JIRA is to discuss how the cost of raw storage for a HDFS file system can be reduced. Keeping three copies of the same data is very costly, especially when the size of stora...
, 2014-11-25, 06:14
[HDFS-695] RaidNode should read in configuration from hdfs-site.xml
...The RaidNode currently reads in the configuration from hadoop-*.xml. It should read in its config parameters from hdfs-site.xml as well....
, 2014-08-28, 16:54
[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
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