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RE: mapr "common" library? - Hadoop - [mail # user]
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...Not sure what you mean.... But w MapR, you have everything under the /opt/mapr/hadoop/hadoop* tree. There you'll see the core library and also the other ./contrib, etc direc tories. &n...
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Author: Michael Segel,
2011-10-20, 04:02
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RE: Can we replace namenode machine with some other machine ? - Hadoop - [mail # user]
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...Well you could do RAID 1 which is just mirroring. I don't think you need to do any raid 0 or raid 5 (striping) to get better performance. Also if you're using a 1U box, you just need 2...
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Author: Michael Segel,
2011-09-22, 16:23
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RE: Can we replace namenode machine with some other machine ? - Hadoop - [mail # user]
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...I agree w Steve except on one thing... RAID 5 Bad. RAID 10 (1+0) good. Sorry this goes back to my RDBMs days where RAID 5 will kill your performan ce and worse... ke...
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Author: Michael Segel,
2011-09-22, 16:13
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RE: risks of using Hadoop - Hadoop - [mail # user]
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...Kobina The points 1 and 2 are definitely real risks. SPOF is not. As I pointed out in my mini-rant to Tom was that your end users / developer s who use the cluster can do more ha...
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Author: Michael Segel,
2011-09-21, 17:48
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RE: risks of using Hadoop - Hadoop - [mail # user]
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...Tom, Normally someone who has a personal beef with someone will take it offline and deal with it. Clearly manners aren't your strong point... unfortunately making me respond &nbs...
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Author: Michael Segel,
2011-09-21, 17:43
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RE: Using HBase for real time transaction - Hadoop - [mail # user]
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... I think there has to be some clarification. The OP was asking about a mySQL replacement. HBase will never be a RDBMS replacement. No Transactions means no way...
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Author: Michael Segel,
2011-09-21, 01:48
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RE: Using HBase for real time transaction - Hadoop - [mail # user]
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...Since Tom isn't technical... ;-) The short answer is No. HBase is not capable of being a transactional because it doesn't support tr ansactions. Nor is HBase ACID compliant. &nbs...
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Author: Michael Segel,
2011-09-20, 21:56
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RE: risks of using Hadoop - Hadoop - [mail # user]
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...Tom, I think it is arrogant to parrot FUD when you've never had your hands dirty in any real Hadoop environment. So how could your response reflect the operational realitie...
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Author: Michael Segel,
2011-09-20, 21:52
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RE: risks of using Hadoop - Hadoop - [mail # user]
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...Gee Tom, No disrespect, but I don't believe you have any personal practical experi ence in designing and building out clusters or putting them to the test. Now to the points that Brian...
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Author: Michael Segel,
2011-09-18, 02:37
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RE: risks of using Hadoop - Hadoop - [mail # user]
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...Risks? Well if you come to Hadoop World in Nov, we actually have a presentation that might help reduce some of your initial risks. There are always risks when starting a ne...
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Author: Michael Segel,
2011-09-16, 21:05
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