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Re: SequenceFileLogReader uses a reflection hack resulting in runtime failures - HBase - [mail # dev]
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...I think it's good to remove the reflection when we can, more because it's easier to catch compile-time errors than run-time. The perf is negligible when you cache. As I recall, t...
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Author: Nicolas Spiegelberg,
2011-12-02, 16:39
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Re: Region Splits - HBase - [mail # user]
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...The downside of hashing is not that it's unpredictable, but that it's non-reversible (which is why you need to append the original key). Reversing should be fine, just make sure that you per...
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Author: Nicolas Spiegelberg,
2011-11-23, 17:18
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Re: Region Splits - HBase - [mail # user]
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...If you increase the region size to 2GB, then all regions (current and new) will avoid a split until their aggregate StoreFile size reaches that limit. Reorganizing the regions for a un...
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Author: Nicolas Spiegelberg,
2011-11-22, 20:46
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Re: Region Splits - HBase - [mail # user]
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...No. The purpose of major compactions is to merge & dedupe within a region boundary. Compactions will not alter region boundaries, except in the case of splits where a compaction ...
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Author: Nicolas Spiegelberg,
2011-11-22, 17:29
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Re: on HBase 1.0 - HBase - [mail # dev]
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...-User : this is really a core dev technical treatise :) Some things to think about before we collaborate next Tuesday. I think some questions need to be really clearly understood...
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Author: Nicolas Spiegelberg,
2011-11-21, 16:31
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Re: Region Splits - HBase - [mail # user]
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...Mark: you are correct about the old_key suffix. I'm assuming that you're worried about this because of keyspace size, correct? The default algorithm for pre-splitting assumes a 3...
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Author: Nicolas Spiegelberg,
2011-11-21, 16:18
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Re: Region Splits - HBase - [mail # user]
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...Sequential writes are also an argument for pre-splitting and using hash prefixing. In other words, presplit your table into N regions instead of the default of 1 & transform your keys ...
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Author: Nicolas Spiegelberg,
2011-11-21, 05:39
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Re: region size/count per regionserver - HBase - [mail # user]
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...Region Scalability is definitely an investigation item that has not been covered yet. We solved the problem with horizontal sharding into multiple clusters instead of tackling that sub...
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Author: Nicolas Spiegelberg,
2011-11-03, 02:55
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Re: patch maturity and HBase release Was: HBASE-4120 table level priority - HBase - [mail # dev]
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...I agree with Todd's sentiments on unnecessarily coupling feature priority with the availability of a patch. There's patches that we've developed internally, then threw away because we ...
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Author: Nicolas Spiegelberg,
2011-11-03, 00:12
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Re: Commit Log format - HBase - [mail # dev]
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...To kick a dead horse, coupling the code diff with the CHANGES.txt alteration is also a massive PITA because its much harder to run 'git cherry-pick' across branches with it. It's far e...
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Author: Nicolas Spiegelberg,
2011-11-01, 23:13
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