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Re: Questions about HBase replication - HBase - [mail # user]
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...So, we have a separate thread doing the recovered logs. That is good to know. I was mostly concerned about any potential races b/w the master renaming the log files, doing the distributed lo...
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Author: Varun Sharma,
2013-05-20, 23:33
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Re: Questions about HBase replication - HBase - [mail # user]
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...On Mon, May 20, 2013 at 3:54 PM, Jean-Daniel Cryans wrote: Yes, but the region server now has 2X the number of WAL(s) to replicate and could suffer higher replication lag as a result....
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Author: Varun Sharma,
2013-05-20, 23:06
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Re: Questions about HBase replication - HBase - [mail # user]
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...Thanks JD for the response... I was just wondering if issues have ever been seen with regards to moving over a large number of WAL(s) entirely from one region server to another since that wo...
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Author: Varun Sharma,
2013-05-20, 22:48
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Re: Questions about HBase replication - HBase - [mail # user]
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...Hi Lars, Thanks for the response. Regarding #2 again, so if RS1 failed, then the following happens... 1) RS2 takes over its logs... 2) Master renames the log containing directory...
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Author: Varun Sharma,
2013-05-20, 07:35
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Questions about HBase replication - HBase - [mail # user]
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...Hi, I have a couple of questions about HBase replication... 1) When we ship edits to slave cluster - do we retain the timestamps in the edits - if we don't, I can imagine hitting...
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Author: Varun Sharma,
2013-05-19, 19:13
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Re: Question about HFile seeking - HBase - [mail # user]
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...Thanks Stack and Lars for the detailed answers - This question is not really motivated by performance problems... So the index indeed knows what part of the HFile key is the row and wh...
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Author: Varun Sharma,
2013-05-17, 07:22
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Re: Question about HFile seeking - HBase - [mail # user]
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...Referring to your comment above again "If you doing a prefix scan w/ row1c, we should be starting the scan at row1c, not row1 (or more correctly at the row that starts the block we bel...
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Author: Varun Sharma,
2013-05-16, 22:26
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Re: Question about HFile seeking - HBase - [mail # user]
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...Sorry I may have misunderstood what you meant. When you look for "row1c" in the HFile index - is it going to also match for "row1,col1" or only match "row1c". It all depends how the in...
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Author: Varun Sharma,
2013-05-16, 21:55
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Re: Question about HFile seeking - HBase - [mail # user]
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...Nothing, I am just curious... So, we will do a bunch of wasteful scanning - that's lets say row1 has col1 - col100000 - basically 100K columns, we will scan all those key values even t...
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Author: Varun Sharma,
2013-05-16, 21:42
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Re: Question about HFile seeking - HBase - [mail # user]
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...Or do we use some kind of demarcator b/w rows and columns and timestamps when building the HFile keys and the indices ? Thanks Varun On Thu, May 16, 2013 at 1:56 PM, Varun Sharm...
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Author: Varun Sharma,
2013-05-16, 21:03
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