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RE: Which release to use? - Hadoop - [mail # user]
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...See, I knew there was something that I forgot. It all goes back to the question ... 'which release to use'... 2 years ago it was a very simple decision. Now, not so much. :-) &...
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Author: Michael Segel,
2011-07-15, 21:58
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RE: Which release to use? - Hadoop - [mail # user]
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...Unfortunately the picture is a bit more confusing. Yahoo! is now HortonWorks. Their stated goal is to not have their own deriv ative release but to sell commercial support for the offi...
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Author: Michael Segel,
2011-07-15, 14:58
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Re: Deduplication Effort in Hadoop - Hadoop - [mail # user]
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...You don't have dupes because the key has to be unique. Sent from my Palm Pre on AT&T On Jul 14, 2011 11:00 AM, [EMAIL PROTECTED] <jonathan.hwang@a ccenture.com> ...
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Author: Michael Segel,
2011-07-14, 16:18
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RE: Performance Tunning - Hadoop - [mail # user]
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... Matthew, I understood that Juan was talking about a 2 socket quad core box. We run boxes with the e5500 (xeon quad core ) chips. Linux sees these as 16 cores. ...
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Author: Michael Segel,
2011-06-28, 18:30
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RE: Any reason Hadoop logs cant be directed to a separate filesystem? - Hadoop - [mail # user]
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...Yes, and its called using cron and writing a simple ksh script to clear o ut any files that are older than 15 days. There may be another way, but that's really the easiest. stem...
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Author: Michael Segel,
2011-06-25, 10:58
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RE: Why inter-rack communication in mapreduce slow? - Hadoop - [mail # user]
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...We've looked at the network problem for the past two years. 10GBe is now a reality. Even a year ago prices were still at a premium. Because you now have 10GBe and you have 2TB dr...
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Author: Michael Segel,
2011-06-07, 11:23
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RE: Hadoop Cluster Multi-datacenter - Hadoop - [mail # user]
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...PWC now getting in to Hadoop? Interesting.... Sanjeev, the simple short answer is that you don't create a cloud that sp ans a data center. Bad design. You build two clusters one per da...
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Author: Michael Segel,
2011-06-07, 11:11
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RE: Why inter-rack communication in mapreduce slow? - Hadoop - [mail # user]
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... these 2 Elton, That 40GB is shared across all of the ports in the switch. But the maximum bandwidth each port can handle is only 1GBe bidirectional. So i...
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Author: Michael Segel,
2011-06-07, 02:15
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RE: Why inter-rack communication in mapreduce slow? - Hadoop - [mail # user]
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...Chris, I've gone back through the thread and here's Elton's initial question... out ld Elton's question deals with why connections within the same switch are fast er than connect...
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Author: Michael Segel,
2011-06-06, 18:04
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RE: Why inter-rack communication in mapreduce slow? - Hadoop - [mail # user]
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...Well the problem is pretty basic. Take your typical 1 GBe switch with 42 ports. Each port is capable of doing 1 GBe in each direction across the switche's fabric. Depending on yo...
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Author: Michael Segel,
2011-06-06, 15:42
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