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[HDFS-2014] bin/hdfs no longer works from a source checkout - HDFS - [issue]
...bin/hdfs now appears to depend on ../libexec, which doesn't exist inside of a source checkout:todd@todd-w510:~/git/hadoop-hdfs$ ./bin/hdfs namenode./bin/hdfs: line 22: /home/todd/git/hadoop-...
http://issues.apache.org/jira/browse/HDFS-2014    Author: Todd Lipcon, 2012-11-29, 09:11
[HDFS-4169] Add per-disk latency metrics to DataNode - HDFS - [issue]
...Currently, if one of the drives on the DataNode is slow, it's hard to determine what the issue is. This can happen due to a failing disk, bad controller, etc. It would be preferable to expos...
http://issues.apache.org/jira/browse/HDFS-4169    Author: Todd Lipcon, 2012-11-29, 03:34
Re: murmur3 instead of crc32 - HDFS - [mail # dev]
...Hi Radim,  With SSE4.2 support, the iSCSI CRC32C is the fastest method available. As of HDFS 2, we use that method by default for new files.  -Todd  On Sun, Nov 25, 2012 at 6:...
   Author: Todd Lipcon, 2012-11-26, 03:38
Re: HDFS append on upgraded cluster - HDFS - [mail # dev]
...Hi Vinayakumar,  If you append to a block which has hard-links, then it will get copied on write at the DataNode. See this code:    /**    * Make a copy of the block...
   Author: Todd Lipcon, 2012-11-19, 19:10
Re: 答复: What is the reason that DataNode should configured the http and streamer port with a number under 1024 in secure mode? - HDFS - [mail # dev]
...On Sun, Nov 18, 2012 at 8:28 PM, Xiaohan  wrote:   The DN->NN RPCs come in on a different port and different IPC interface than the client RPCs. The DN->NN RPC only allows a ...
   Author: Todd Lipcon, 2012-11-19, 18:01
[HDFS-528] Add ability for safemode to wait for a minimum number of live datanodes - HDFS - [issue]
...When starting up a fresh cluster programatically, users often want to wait until DFS is "writable" before continuing in a script. "dfsadmin -safemode wait" doesn't quite work for this on a c...
http://issues.apache.org/jira/browse/HDFS-528    Author: Todd Lipcon, 2012-11-19, 06:53
[HDFS-4202] Some usage of GetConf tool not compatible with federation - HDFS - [issue]
...In the start/stop scripts, we use the "getconf" tool to look up certain config keys to discover hosts we need to start/stop daemons on. However, some of these configs are optionally suffixed...
http://issues.apache.org/jira/browse/HDFS-4202    Author: Todd Lipcon, 2012-11-16, 21:48
Re: HA for hadoop-0.20.2 - HDFS - [mail # dev]
...Hi Liu,  HA in Hadoop 2 was nearly a year-long project. There's likely no way you'll be able to backport it onto 0.20 and end up with a stable product.  If you want to attempt it, ...
   Author: Todd Lipcon, 2012-11-14, 17:14
[HDFS-2465] Add HDFS support for fadvise readahead and drop-behind - HDFS - [issue]
...This is the HDFS side of HADOOP-7714. The initial implementation is heuristic based and should be considered experimental, as discussed in the parent JIRA. It should be off by default until ...
http://issues.apache.org/jira/browse/HDFS-2465    Author: Todd Lipcon, 2012-11-13, 03:36
[HDFS-4176] EditLogTailer should call rollEdits with a timeout - HDFS - [issue]
...When the EditLogTailer thread calls rollEdits() on the active NN via RPC, it currently does so without a timeout. So, if the active NN has frozen (but not actually crashed), this call can ha...
http://issues.apache.org/jira/browse/HDFS-4176    Author: Todd Lipcon, 2012-11-12, 19:11
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