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[HDFS-252] Export the HDFS file system through a NFS protocol - HDFS - [issue]
...It would be nice if can expose the HDFS filesystem using the NFS protocol.There are a couple of options that I could find:1. Use a user space C-language-implementation of a NFS server and th...
http://issues.apache.org/jira/browse/HDFS-252    Author: dhruba borthakur, 2013-04-25, 04:11
[HDFS-487] HDFS should expose a fileid to uniquely identify a file - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-487    Author: dhruba borthakur, 2013-04-19, 23:27
[HDFS-1783] Ability for HDFS client to write replicas in parallel - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-1783    Author: dhruba borthakur, 2013-03-06, 19:40
[HDFS-976] Hot Standby for NameNode - HDFS - [issue]
...This is a place holder to share our code and experiences about implementing a Hot Standby for the HDFS NameNode for hadoop 0.20....
http://issues.apache.org/jira/browse/HDFS-976    Author: dhruba borthakur, 2013-02-08, 23:50
[HDFS-395] DFS Scalability: Incremental block reports - HDFS - [issue]
...I have a cluster that has 1800 datanodes. Each datanode has around 50000 blocks and sends a block report to the namenode once every hour. This means that the namenode processes a block repor...
http://issues.apache.org/jira/browse/HDFS-395    Author: dhruba borthakur, 2013-02-01, 12:40
[HDFS-1108] Log newly allocated blocks - HDFS - [issue]
...The current HDFS design says that newly allocated blocks for a file are not persisted in the NN transaction log when the block is allocated. Instead, a hflush() or a close() on the file pers...
http://issues.apache.org/jira/browse/HDFS-1108    Author: dhruba borthakur, 2012-12-03, 07:33
[HDFS-1031] Enhance the webUi to list a few of the corrupted files in HDFS - HDFS - [issue]
...The existing webUI displays something like this:WARNING : There are about 12 missing blocks. Please check the log or run fsck. It would be nice if we can display the filenames that have miss...
http://issues.apache.org/jira/browse/HDFS-1031    Author: dhruba borthakur, 2012-11-10, 23:34
[HDFS-978] Record every new block allocation of a file into the transaction log. - HDFS - [issue]
...HDFS should record every new block allocation (of a file) into its transaction logs. In the current code, block allocations are persisted only when a file is closed or hflush-ed. This featur...
http://issues.apache.org/jira/browse/HDFS-978    Author: dhruba borthakur, 2012-08-24, 01:26
[HDFS-1508] Ability to do savenamespace without being in safemode - HDFS - [issue]
...In the current code, the administrator can run savenamespace only after putting the namenode in safemode. This means that applications that are writing to HDFS encounters errors because the ...
http://issues.apache.org/jira/browse/HDFS-1508    Author: dhruba borthakur, 2012-07-09, 21:15
[HDFS-1509] Resync discarded directories in fs.name.dir during saveNamespace command - HDFS - [issue]
...In the current implementation, if the Namenode encounters an error while writing to a fs.name.dir directory it stops writing new edits to that directory. My proposal is to make  the nam...
http://issues.apache.org/jira/browse/HDFS-1509    Author: dhruba borthakur, 2012-07-09, 21:14
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