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Hadoop, mail # user - Re: Which hardware to choose


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Oleg Ruchovets 2012-10-02, 14:59
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Alexander Pivovarov 2012-10-02, 18:55
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hadoopman 2012-10-03, 01:14
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Re: Which hardware to choose
Michael Segel 2012-10-03, 01:40
I think he's saying that its 24 maps 8 reducers per node and at 48GB that could be too many mappers.
Especially if they want to run HBase.

On Oct 2, 2012, at 8:14 PM, hadoopman <[EMAIL PROTECTED]> wrote:

> Only 24 map and 8 reduce tasks for 38 data nodes?  are you sure that's right?  Sounds VERY low for a cluster that size.
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> We have only 10 c2100's and are running I believe 140 map and 70 reduce slots so far with pretty decent performance.
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> On 10/02/2012 12:55 PM, Alexander Pivovarov wrote:
>> 38 data nodes + 2 Name Nodes
>> >  >
>> >  >  Data Node:
>> >  >  Dell PowerEdge C2100 series
>> >  >  2 x XEON x5670
>> >  >  48 GB RAM ECC  (12x4GB 1333MHz)
>> >  >  12 x 2 TB  7200 RPM SATA HDD (with hot swap)  JBOD
>> >  >  Intel Gigabit ET Dual port PCIe x4
>> >  >  Redundant Power Supply
>> >  >  Hadoop CDH3
>> >  >  max map tasks 24
>> >  >  max reduce tasks 8
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>
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Marcos Ortiz 2012-10-03, 01:57
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Michael Segel 2012-10-03, 02:35
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Alexander Pivovarov 2012-10-03, 03:42
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J. Rottinghuis 2012-10-03, 17:09
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Michael Segel 2012-10-03, 17:21
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Russell Jurney 2012-10-03, 01:19
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hadoopman 2012-10-03, 01:33