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Re: how to get the time of a hadoop cluster, v0.20.2 - Hadoop - [mail # user]
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...Then you have a problem where the solution is more of people management and not technical. All of your servers should be using NTP. At a minimum, you have one server that gets t...
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Author: Michael Segel,
2013-05-18, 15:54
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Re: how to get the time of a hadoop cluster, v0.20.2 - Hadoop - [mail # user]
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...Uhm... sort of... Niels is essentially correct and for the most of us, just starting an NNTPd on a server that sync's with a government clock and then your local servers sync to that....
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Author: Michael Segel,
2013-05-16, 16:46
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Re: How can I record some position of context in Reduce()? - Hadoop - [mail # user]
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...Hi, Your cross join is supported in both pig and hive. (Cross, and Theta joins) So there must be code to do this. Essentially in the reducer you would have your key and t...
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Author: Michael Segel,
2013-04-09, 13:08
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Re: Database insertion by HAdoop - Hadoop - [mail # user]
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...Nope HBase wasn't mentioned. The OP could be talking about using external tables and Hive. The OP could still be stuck in the RDBMs world and hasn't flattened his data yet. &nbs...
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Author: Michael Segel,
2013-02-18, 16:57
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Re: Select Linux Distro for Hbase - Hadoop - [mail # general]
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...RedHat, or Centos is the best. (Its the same thing... well sort of... ;-) You can use other distros but YMMV and you need to make sure that you're not using the Open Source JDK ...
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Author: Michael Segel,
2013-01-23, 14:14
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Re: Hello and request some advice. - Hadoop - [mail # user]
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...Uhm... Well, you can talk to Microsoft and Hortonworks about Microsoft as a platform. Depending on the power of your laptop, you could create a VM and run hadoop in a pseudo dis...
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Author: Michael Segel,
2013-01-04, 19:53
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Re: NN Memory Jumps every 1 1/2 hours - Hadoop - [mail # user]
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...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...
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Author: Michael Segel,
2012-12-22, 15:42
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Re: What should I do with a 48-node cluster - Hadoop - [mail # user]
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...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...
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Author: Michael Segel,
2012-12-20, 15:38
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Re: Chaining MapReduce Jobs - Hadoop - [mail # general]
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...Have you looked at the ToolRunner class? On Nov 8, 2012, at 7:03 AM, Claudio Reggiani wrote: ...
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Author: Michael Segel,
2012-11-08, 19:12
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Re: Disks RAID best practice - Hadoop - [mail # user]
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...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...
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Author: Michael Segel,
2012-11-01, 14:49
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