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Re: Use of MD5 as row keys - is this safe? - HBase - [mail # user]
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...Ethan, Its not a question of collision attacks, although that is an indication of the strength of the hash. Just because both MD5 and SHA-1 yield a key of the same length,...
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Author: Michael Segel,
2012-07-23, 11:55
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Re: How to merge regions in HBase? - HBase - [mail # user]
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...Find a different row key? The problem with merging regions is that once you merge the regions, any net new regions will still have the same problem. So you'll have to merg...
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Author: Michael Segel,
2012-07-17, 23:15
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Re: Maximum number of tables ? - HBase - [mail # user]
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...I'm going from memory. There was a hardcoded number. I'd have to go back and try to find it. From a practical standpoint, going over 1000 regions per RS will put you on th...
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Author: Michael Segel,
2012-07-13, 17:40
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Re: Maximum number of tables ? - HBase - [mail # user]
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...Currently there is a hardcoded limit on the number of regions that a region server can manage. Its 1500. Note that if the number of regions gets to around 1000 regions per ...
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Author: Michael Segel,
2012-07-13, 15:42
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Re: Embedded table data model - HBase - [mail # user]
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...First, A caveat... Schema design in HBase is one of the hardest things to teach/learn because its so open. There is more than one correct answer when it comes to creating a...
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Author: Michael Segel,
2012-07-13, 14:55
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Re: DataNode Hardware - HBase - [mail # user]
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...Uhm... I'd take a step back... this CPU bound; plus my naive assumption was that four spindles will have a hard time supplying data to MR fast enough for it to become bogge...
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Author: Michael Segel,
2012-07-12, 23:22
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Re: Improvement: Provide better feedback on Put to unknown CF - HBase - [mail # user]
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...Nobody is arguing that the exception message doesn't make sense. +1 to making better error messages. What I am suggesting is to take advantage of HBase's meta data. That is, &nbs...
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Author: Michael Segel,
2012-07-10, 22:15
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Re: Mixing Puts and Deletes in a single RPC - HBase - [mail # user]
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...Regardless, Its still a bad design. On Jul 9, 2012, at 10:02 PM, Jonathan Hsieh wrote: ...
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Author: Michael Segel,
2012-07-10, 11:57
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Re: Improvement: Provide better feedback on Put to unknown CF - HBase - [mail # user]
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...Jean-Marc, I think you mis understood. At run time, you can query HBase to find out the table schema and its column families. While I agree that you are seeing poorl...
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Author: Michael Segel,
2012-07-09, 14:39
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Re: Improvement: Provide better feedback on Put to unknown CF - HBase - [mail # user]
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...This may beg the question ... Why do you not know the CF? Your table schemas only consist of tables and CFs. So you should know them at the start of your job or m/r Mapper....
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Author: Michael Segel,
2012-07-09, 13:37
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