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Re: NN Memory Jumps every 1 1/2 hours - Hadoop - [mail # user]
...Hey Silly question...   How long have you had 27 million files?   I mean can you correlate the number of files to the spat of OOMs?   Even without problems... I'd say it would...
   Author: Michael Segel, 2012-12-22, 15:42
Re: What should I do with a 48-node cluster - Hadoop - [mail # user]
...While Ted ignores that the world is going to end before X-Mas, he does hit the crux of the matter head on.   If you don't have a place to put it, the cost of setting it up would kill yo...
   Author: Michael Segel, 2012-12-20, 15:38
Re: Chaining MapReduce Jobs - Hadoop - [mail # general]
...Have you looked at the ToolRunner class?   On Nov 8, 2012, at 7:03 AM, Claudio Reggiani  wrote:  ...
   Author: Michael Segel, 2012-11-08, 19:12
Re: Disks RAID best practice - Hadoop - [mail # user]
...Oleg, that's for an overall raid preference.   Specifically for the 'control nodes' aka (NN, SN, JT, HM, ZK...)   I tend to just use simple mirroring because these processes are no...
   Author: Michael Segel, 2012-11-01, 14:49
Re: measuring iops - Hadoop - [mail # user]
...You have two issues.   1) You need to know the throughput in terms of data transfer between  disks and controller cards on the node.  2) The actual network throughput of havin...
   Author: Michael Segel, 2012-10-23, 13:19
Re: Hadoop counter - Hadoop - [mail # user]
...Yup.  The counters at the end of the job are the most accurate.   On Oct 22, 2012, at 3:00 AM, Lin Ma  wrote:  discussion. how/when JT merge counter in the middle of the ...
   Author: Michael Segel, 2012-10-23, 03:57
Re: reg hadoop on AWS - Hadoop - [mail # user]
...Actually the best way to do it is to use EMR since everything is then  built for you.    On Oct 5, 2012, at 7:21 AM, Nitin Pawar  wrote:  problem with the parameters...
   Author: Michael Segel, 2012-10-05, 12:57
Re: Which hardware to choose - Hadoop - [mail # user]
...Well...   If you're not running HBase, you're less harmed by minimal swapping so  you could push the number of slots and over subscribe.  The only thing I would have to sugges...
   Author: Michael Segel, 2012-10-03, 17:21
Re: HADOOP in Production - Hadoop - [mail # user]
...Funny that the OP asks about 'real time'...  This comes up quiet often and its always misunderstood.   First, when we say 'real time' many take it to mean subjective real  tim...
   Author: Michael Segel, 2012-10-02, 12:04
Re: Reg Hadoop Installation - Hadoop - [mail # user]
...Interesting...  I guess it gets to the question of how to install Hadoop on a Linux  virtualized subsystem on Z (mainframe)  Kinda gives one an idea of how IBM plans on keepin...
   Author: Michael Segel, 2012-09-05, 19:07
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