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Re: reference architecture - MapReduce - [mail # user]
...On 25 October 2012 23:17, Daniel Käfer  wro te:    Depends on the amount of data and expected use. If it's transient food for the next MR jobs: HDFS...
   Author: Steve Loughran, 2012-10-26, 17:25
Re: HDFS HA IO Fencing - MapReduce - [mail # user]
...On 26 October 2012 15:37, Todd Lipcon  wrote:     +1. This is why you are told to mount your shared edit log NFS servers with the "soft" option -otherwise you can't swap over ...
   Author: Steve Loughran, 2012-10-26, 17:23
Re: Large input files via HTTP - MapReduce - [mail # user]
...data ingress is often done as an initial MR job.  Here is sounds like you'd need -a list of URLs, which you can have a single mapper run through and  map to (hostname,url)  wh...
   Author: Steve Loughran, 2012-10-22, 08:47
Re: HDFS using SAN - MapReduce - [mail # user]
...On 18 October 2012 16:46, Zhani Pellumbi  wrote:  That's an interesting article -though I came out confused.  Where it talks about "HDFS protocol", what I think it means is th...
   Author: Steve Loughran, 2012-10-19, 08:06
Re: Question about namenode HA - MapReduce - [mail # user]
...On 15 October 2012 04:01, 谢良  wrote:   I don't know the answer to that, except I do know that you are usually best a monitoring the state of a process externally, as liveness is de...
   Author: Steve Loughran, 2012-10-15, 10:16
Re: Reading Sequence File from Hadoop Distributed Cache .. - MapReduce - [mail # user]
...On 11 October 2012 20:53, Mark Olimpiati  wrote:    gives you the default FS for that process, which can be different.  what about FileSystem.get("file://tmp",new Configu...
   Author: Steve Loughran, 2012-10-12, 18:27
Re: Why they recommend this (CPU) ? - MapReduce - [mail # user]
...On 11 October 2012 20:47, Goldstone, Robin J.  wrote:  mmm. There is more $L3, and in-CPU sync can be done better than over the inter-socket bus -you're also less vulnerable to NUM...
   Author: Steve Loughran, 2012-10-12, 08:19
Re: How to change topology - MapReduce - [mail # user]
...On 9 October 2012 16:51, Shinichi Yamashita  wrote:   That's right. There's been lots of discussion on adding live topology resetting.  There's also a large unfinished JIRA in...
   Author: Steve Loughran, 2012-10-09, 19:17
Re: Cumulative value using mapreduce - MapReduce - [mail # user]
...On 5 October 2012 06:50, Ted Dunning  wrote:    since 2008, if I'm not mistaken...
   Author: Steve Loughran, 2012-10-05, 14:43
Re: Hadoop Jobtracker web administration tool, hadoop job -list and Tasktrackers Web UI's show no information - MapReduce - [mail # user]
...The fact that one machine thinks is hostname->IP addr mapping is different from the others is often considered highly significant when diagnosing network connectivity issues...
   Author: Steve Loughran, 2012-10-03, 10:23
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