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Re: Efficient way to read a large number of files in S3 and upload their content to HBase - HBase - [mail # user]
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...This is a question I see coming up a lot. Put differently: what characteris tics make it useful to use HBase on top of HDFS, as opposed to just flat fi les in HDFS directly? "Quantity" isn't...
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Author: Ian Varley,
2012-05-24, 21:12
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Re: HBase logging only prints ulimit information - HBase - [mail # user]
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...How did you end up figuring that out, Kevin? Was there a more ominous messa ge in the logs about this? Should have logged something like: "WARNING: Server foo has been rejected; Report...
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Author: Ian Varley,
2012-05-24, 20:17
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Re: key design - HBase - [mail # user]
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...Mete, Why separate tables per log type? Why not a single table with the key: That's roughly the approach used by OpenTSDB (with "metric id" instead of " log type", but sam...
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Author: Ian Varley,
2012-05-21, 15:12
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Re: getting real, does hbase need constant mothering or can a 1-man show use it? - HBase - [mail # user]
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...All things considered, I tend to see HBase as being a little more on the "i ndustrial strength" side of things. It's designed to handle really large da ta volumes and run on tens or hundreds...
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Author: Ian Varley,
2012-05-19, 17:17
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Re: understanding the code base, patterns, threading, etc. - HBase - [mail # dev]
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...Well, the first answer is always the same: read the code! :) Of course, sometimes it's difficult to get the high level concepts quickly that way (even with good docs, like the HB...
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Author: Ian Varley,
2012-05-17, 13:44
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Re: hbase as a primary store, or is it more for "2nd class" data? - HBase - [mail # user]
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...Ahmed, Generally speaking, the intent of HBase IS to be a first class data store. It's a young data store (not even 1.0) so you have to take that into accoun t; but there's been ...
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Author: Ian Varley,
2012-05-14, 14:48
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Re: Overwriting qualifiers in an existing table - HBase - [mail # user]
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...Map/Reduce jobs are generally the best approach for working with every row in a table. You can read all about it here: http://hbase.apache.org/book.html#mapreduce I've neve...
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Author: Ian Varley,
2012-04-24, 08:35
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Re: More tables, or add a prefix to each row key? - HBase - [mail # user]
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...Tom, The overall tradeoff with "table vs prefix" is that the former adds some (s mall) amount of cluster management overhead for each new table, whereas the latter adds runtime o...
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Author: Ian Varley,
2012-04-19, 16:48
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Re: Performance issues of prepending a table - HBase - [mail # user]
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...I would guess that this approach would be susceptible to the same kind of " hot spotting" as inserting sequential keys; if you're prepending globally ( i.e. there's one global "first" row), ...
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Author: Ian Varley,
2012-04-18, 14:11
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Re: Is htable.delete(List<Delete>) transactional? - HBase - [mail # user]
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...More complex answer: generally, nothing that involves more than a single ro w in HBase is transactional. :) It's possible that HBase might get some limited form of multi-row transacti ...
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Author: Ian Varley,
2012-04-16, 23:41
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