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copy-on-write used in Hadoop file system upgrade - Hadoop - [mail # user]
...Hi guys,  I am reading from there for Hadoop handles file system upgrade ( http://www.storageconference.org/2010/Papers/MSST/Shvachko.pdf), it is mentioned, "and block modifications dur...
   Author: Lin Ma, 2013-04-07, 13:10
[expand - 2 more] - Re: backup node question - Hadoop - [mail # user]
...Thanks for answering my question, Harsh.  regards, Lin  On Sun, Apr 7, 2013 at 4:05 PM, Harsh J  wrote:  ...
   Author: Lin Ma, 2013-04-07, 08:15
replication factor - Hadoop - [mail # user]
...Hello guys,  I want to learn a bit more when we need to change (increase/decrease) replication factor for better performance, and also want to learn a bit more internals about how repli...
   Author: Lin Ma, 2013-02-05, 17:28
hadoop queue - HDFS - [mail # user]
...Hi guys,  It is mentioned below for Hadoop queue ( http://blog.cloudera.com/blog/2008/11/job-scheduling-in-hadoop/), for the comments "FIFO scheduling with priorities is used", does it ...
   Author: Lin Ma, 2013-01-28, 03:02
[expand - 2 more] - Re: Fair Scheduler of Hadoop - HDFS - [mail # user]
...Thanks Joep, smart answer! All of my confusions are gone. Have a good weekend.  regards, Lin  On Tue, Jan 22, 2013 at 2:00 AM, Joep Rottinghuis wrote:  ...
   Author: Lin Ma, 2013-01-26, 15:38
[expand - 7 more] - Re: distributed cache - HDFS - [mail # user]
...Thanks Harsh,  (1) "Thankfully, due to block sizes the latter isn't a problem for large files on a proper DN, as the blocks are spread over the disks and across the nodes." -- What do y...
   Author: Lin Ma, 2012-12-28, 10:02
[expand - 2 more] - Re: reducer tasks start time issue - HDFS - [mail # user]
...Thanks Rishi,  My question is answered.  regards, Lin  On Sun, Dec 23, 2012 at 12:09 AM, Rishi Yadav  wrote:  ...
   Author: Lin Ma, 2012-12-23, 15:09
[expand - 2 more] - Re: One mapper/reducer runs on a single JVM - MapReduce - [mail # user]
...Thanks Mike.  1. So I think you mean for Hadoop, since it is batch job latency is not the most key concern, so time spent on swap is acceptable. But for HBase, the normal use case is on...
   Author: Lin Ma, 2012-11-07, 12:32
[expand - 8 more] - Re: Hadoop counter - MapReduce - [mail # user]
...Thanks for the long discussion Mile. Learned a lot from you.  regards, Lin  On Tue, Oct 23, 2012 at 11:57 AM, Michael Segel wrote:  ...
   Author: Lin Ma, 2012-10-23, 07:12
HDFS footprint of a table - HBase - [mail # user]
...Hi guys,  Supposing I have a table in HBase, how to estimate its storage footprint? Thanks.  regards, Lin...
   Author: Lin Ma, 2012-09-11, 07:35
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