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Re: corrupted edits log after power failure - HDFS - [mail # dev]
...Hi Gabi,  I'd be a bit scared of that backup strategy; what happens if the TCP  connection gets cut suddenly during curl?  What happens if there's a TCP  corruption? &nbs...
   Author: Brian Bockelman, 2011-09-22, 19:15
Re: questions regarding fuse_dfs_read - HDFS - [mail # dev]
...Hi Aastha,  A read-ahead buffer is a common technique to trade higher bandwidth for  lower latency for a number of common read patterns.  Your OS does  something similar ...
   Author: Brian Bockelman, 2011-09-07, 12:15
Re: Merging Namenode Federation feature (HDFS-1052) to trunk - HDFS - [mail # dev]
...On Mar 21, 2011, at 6:08 PM, Sanjay Radia wrote:  DNs. things if a data node is willing to store blocks for any NN anywhere in the  data center. with a set of data nodes and each c...
   Author: Brian Bockelman, 2011-03-21, 23:25
[expand - 1 more] - Re: libhdfs not getting compiled - HDFS - [mail # dev]
...Hi Aastha,  This is not hadoop-specific advice, but general debugging:  1) Verify you are using the version of the library you think you are.   Done. 2) Rebuild. 3) Check the ...
   Author: Brian Bockelman, 2011-03-18, 13:23
Re: problems with fuse-dfs - HDFS - [mail # dev]
...On Mar 2, 2011, at 12:46 AM, Aastha Mehta wrote:  and connection the  Can you post the attempts?  Sounds like it may not be configured  correctly.  SIZE/OFF denied) ...
   Author: Brian Bockelman, 2011-03-02, 12:27
Fwd: problems with fuse-dfs - HDFS - [mail # dev]
...Sorry, resending on hdfs-dev; apparently I'm not on -user.  Begin forwarded message:  this see a log modified by one that my host No following LD_LIBRARY_PATH=$HADOOP_HOME/build/li...
   Author: Brian Bockelman, 2011-03-02, 00:26
[expand - 3 more] - Re: DataBlockScanner scan period - HDFS - [mail # dev]
...On Nov 23, 2010, at 7:41 PM, Thanh Do wrote:   Why?  What if you restarted your datanode once every 2 weeks?  Last I  checked, HDFS randomly assigned blocks to be verifie...
   Author: Brian Bockelman, 2010-11-24, 01:52
Re: how can we know the statistics of namenode and datanode using API's - HDFS - [mail # dev]
...Hey Vidur,  Do you need to access it directly in Java, or can you just parse them  out of (for example) Ganglia?  There are JMX statistics, but I am not  familiar enough ...
   Author: Brian Bockelman, 2010-06-11, 12:45
Re: HDFS-1150: Comment and review - HDFS - [mail # dev]
...Hey Jakob,  If I understand correctly, then two plausible ways of attacking a client  are then: 1) Screw up the client's DNS resolution somehow (reference the rather  serious ...
   Author: Brian Bockelman, 2010-05-15, 00:00
Re: HDFS Blockreport question - HDFS - [mail # dev]
...Hey Jay,  I think, if you're experienced in implementing transfer protocols, it is  not difficult to implement the HDFS wire protocol.  As you point out,  they are subjec...
   Author: Brian Bockelman, 2010-04-06, 14:50
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB