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[expand - 1 more] - Re: read from a hdfs file on the same host as client - Hadoop - [mail # user]
...Shivram,many thanks for confirming the behavior. I will also turn on theshortcircuit as you suggested. Appreciate the helpDemaiOn Mon, Oct 13, 2014 at 3:42 PM, Shivram Mani  wrote: ...
   Author: Demai Ni, 2014-10-14, 01:36
hdfs: a C API call to getFileSize() through libhdfs or libhdfs3? - Hadoop - [mail # user]
...hi, folks,To get the size of a hdfs file, jave API hasFileSystem#getFileStatus(PATH)#getLen();now I am trying to use a C client to do the same thing.For a file on local file system, I can gr...
   Author: Demai Ni, 2014-10-02, 21:51
Re: Planning to propose Hadoop initiative to company. Need some inputs please. - Hadoop - [mail # user]
...hi,glad to see another person moving from mainframe world to the 'big' dataone. I was in the same boat a few years back after working on mainframe for10+ years.Wilm got to the pointers alrea...
   Author: Demai Ni, 2014-10-01, 18:47
Re: HBase Bulk Lookup - HBase - [mail # user]
...Bin,Are you talking about point-search or range-search?While I think HBase is very good at point-search(comparing to other bigdata store),  I have similar questions about range-search. ...
   Author: Demai Ni, 2014-09-22, 18:14
[expand - 4 more] - Re: conf.get("dfs.data.dir") return null when hdfs-site.xml doesn't set it explicitly - Hadoop - [mail # user]
...Yong,good point about each node of the cluster could have different values inthe .xml files, and probably true if the nodes have different role orhardware settings. so some of the configurat...
   Author: Demai Ni, 2014-09-09, 18:34
Re: Nested data structures examples for HBase - HBase - [mail # user]
...there was a schema design talk in HBase conf 2012 (http://www.slideshare.net/cloudera/5-h-base-schemahbasecon2012). There wasa video but the link from here: http://hbasecon.com/archive.html,...
   Author: Demai Ni, 2014-09-08, 23:00
[HBASE-9531] a command line (hbase shell) interface to retreive the replication metrics and show replication lag - HBase - [issue]
...This jira is to provide a command line (hbase shell) interface to retreive the replication metrics info such as:ageOfLastShippedOp, timeStampsOfLastShippedOp, sizeOfLogQueue ageOfLastApplied...
http://issues.apache.org/jira/browse/HBASE-9531    Author: Demai Ni, 2014-09-05, 05:06
[expand - 1 more] - Re: question about matching java API with libHDFS - Hadoop - [mail # user]
...hi, Yi A,Thanks for your response. I took a look at hdfs.h and hdfs.c, it seems thelib only exposes some of APIs, as there are a lot of other public methodscan be accessed through java API/c...
   Author: Demai Ni, 2014-09-04, 15:47
[expand - 4 more] - Re: Local file system to access hdfs blocks - Hadoop - [mail # user]
...Stanley, Thanks. Btw, I found this jira hdfs-2246, which probably match what I am looking for.  Demai on the runOn Aug 28, 2014, at 11:34 PM, Stanley Shi  wrote: ...
   Author: Demai Ni, 2014-08-30, 01:26
[HBASE-11617] incorrect AgeOfLastAppliedOp and AgeOfLastShippedOp in replication Metrics when no new replication OP - HBase - [issue]
...AgeOfLastAppliedOp in MetricsSink.java is to indicate the time an edit sat in the 'replication queue' before it got replicated(aka applied)  /**   * Set the age of the la...
http://issues.apache.org/jira/browse/HBASE-11617    Author: Demai Ni, 2014-08-24, 06:53
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