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Re: how to caculate a HDFS directory size ? - HDFS - [mail # user]
...You may want to check the fs shell command COUNT and DU.  On Wed, Jan 8, 2014 at 4:57 PM, ch huang  wrote:  CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use...
   Author: Jing Zhao, 2014-01-09, 01:07
[HDFS-4666] Disallow users to create file/dir named ".snapshot" - HDFS - [issue]
...Currently ".snapshot" is reserved by snapshots as a special tag to specify the path leading to snapshot copies. We should disallow users to create file/dir using name ".snapshot"....
http://issues.apache.org/jira/browse/HDFS-4666    Author: Jing Zhao, 2013-12-31, 23:21
[HDFS-5476] Snapshot: clean the blocks/files/directories under a renamed file/directory while deletion - HDFS - [issue]
...Currently DstReference#destroyAndCollectBlocks may fail to clean the subtree under the DstReference node for file/directory/snapshot deletion.Use case 1: rename under-construction file with ...
http://issues.apache.org/jira/browse/HDFS-5476    Author: Jing Zhao, 2013-12-11, 14:40
[HDFS-5633] Improve OfflineImageViewer to use less memory - HDFS - [issue]
...Currently after we rename a file/dir which is included in a snapshot, the file/dir can be linked with two different reference INodes. To avoid saving/loading the inode multiple times in/from...
http://issues.apache.org/jira/browse/HDFS-5633    Author: Jing Zhao, 2013-12-06, 13:41
[HDFS-5590] Block ID and generation stamp may be reused when persistBlocks is set to false - HDFS - [issue]
...In a cluster with non-HA setup and dfs.persist.blocks set to false, we may have data loss in the following case: client creates file1 and requests a block from NN and get blk_id1_gs1 client ...
http://issues.apache.org/jira/browse/HDFS-5590    Author: Jing Zhao, 2013-12-06, 13:41
Re: Debugging/Modifying HDFS from Eclipse - HDFS - [mail # user]
...MiniDFSCluster is used everywhere in HDFS's unit tests. You can easily find examples in the source code of HDFS (e.g., org.apache.hadoop.hdfs.TestDFSMkdirs). You can also test simple HA setu...
   Author: Jing Zhao, 2013-12-05, 23:00
Re: Deprecate BackupNode - HDFS - [mail # dev]
...+1. BackupNode also brings extra work for the recent https/http policy work, since we need to make sure the checkpoint works for all the policy/security combinations. We should deprecate it ...
   Author: Jing Zhao, 2013-12-04, 23:25
Re: Deprecate hftp / hsftp - HDFS - [mail # dev]
...+1  So I've reviewed most of Haohui's patch for developing swebhdfs, fixing https setup for hsftp, and supporting HA in webhdfs. For both webhdfs and swebhdfs we have run system tests o...
   Author: Jing Zhao, 2013-11-27, 02:01
[HDFS-5145] Revisit the needEnter() check in SafeModeInfo#canLeave() - HDFS - [issue]
...The current code in SafeModeInfo#canLeave checks needEnter() again. This may be unnecessary as per discussion in HDFS-5140. Let's revisit SafeModeInfo#canLeave in this jira....
http://issues.apache.org/jira/browse/HDFS-5145    Author: Jing Zhao, 2013-11-11, 18:51
[HDFS-4213] When the client calls hsync, allows the client to update the file length in the NameNode - HDFS - [issue]
...As per discussion in HDFS-3960 and HDFS-2802, when clients that need strong consistency update the file length at the NameNode, a special sync/flush is required for getting the length of the...
http://issues.apache.org/jira/browse/HDFS-4213    Author: Jing Zhao, 2013-11-10, 23:54
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