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Re: consistency, availability and partition pattern of HBase - HBase - [mail # user]
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...Hi Lin, In the CAP theorem Consistency stands for atomic consistency, i.e., each CRUD operation occurs sequentially in a global, real-time clock Availability means each server if...
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Author: Wei Tan,
2012-08-08, 04:18
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Re: memstore timestamp and visible timestamp - HBase - [mail # dev]
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...Hi, A follow up question: When using region assigned ts, are these two assumptions true? 1. it is impossible that two puts on the same row wil...
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Author: Wei Tan,
2012-08-06, 14:25
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RE: HBase MapReduce - Using mutiple tables as source - HBase - [mail # user]
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...A related question: may I have multiple tables as output, in a single Map Job? I understand that this is achievable by running multiple MR jobs, each with a different output tabl...
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Author: Wei Tan,
2012-08-06, 14:22
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Re: memstore timestamp and visible timestamp - HBase - [mail # dev]
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...Hi Lars, I agree with you on that, this comparison only makes sense when we have two concurrent put to the same key, i.e., (k, v1) and (k, v2), AND we ask the regio...
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Author: Wei Tan,
2012-08-03, 21:58
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Re: memstore timestamp and visible timestamp - HBase - [mail # dev]
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...Hi Lars, "Since the region server also hands out the TSs based on wall clock time (and assuming time does not go backwards) it follows that a KV assigned a later me...
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Author: Wei Tan,
2012-08-03, 19:43
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Re: memstore timestamp and visible timestamp - HBase - [mail # dev]
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...Hi Lars, Appreciate your reply. Actually I read your blog posting and then had that question. I am very interested in how you guarantee this: Also note that...
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Author: Wei Tan,
2012-08-03, 14:21
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memstore timestamp and visible timestamp - HBase - [mail # dev]
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...Hi, I have a question regarding the correlation between the visible timestamp of a KV (denoted as ts) and its memstore timestamp (aka, the write number, denoted as m...
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Author: Wei Tan,
2012-08-03, 03:02
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memstore timestamp and visible timestamp - HBase - [mail # dev]
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...Hi, I have a question regarding the correlation between the visible timestamp of a KV (denoted as ts) and its memstore timestamp (aka, the write number, denoted as m...
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Author: Wei Tan,
2012-08-02, 22:35
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RE: Retrieve Put timestamp - HBase - [mail # user]
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...+1. So far I think timestamp is very useful. I would imagine if we can configure the return, say in pre/post put, it would be even nicer. Thanks, Wei Wei Tan Research Staff...
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Author: Wei Tan,
2012-08-02, 16:37
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Re: Retrieve Put timestamp - HBase - [mail # user]
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...We have a similar requirement and here is the solution in our mind: add a coprocessor, in prePut() get the current ms and set it to put --- the current implementation get the current m...
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Author: Wei Tan,
2012-08-01, 18:12
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