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Re: Optimizing table scans - HBase - [mail # user]
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...Hi there, See this for info on the block cache in the RegionServer.. http://hbase.apache.org/book.html 9.6.4. Block Cache Š and see this for "batching" on the scan paramet...
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Author: Doug Meil,
2012-09-12, 14:37
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Re: Regarding rowkey - HBase - [mail # user]
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...Hi there, have you read this? http://hbase.apache.org/book.html#performance And especially this? http://hbase.apache.org/book.html#perf.writing How many nodes is the...
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Author: Doug Meil,
2012-09-11, 18:46
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Re: More rows or less rows and more columns - HBase - [mail # user]
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...re: "You may want to update this section" Good point. I will add. On 9/11/12 6:59 AM, "Michel Segel" wrote: ...
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Author: Doug Meil,
2012-09-11, 12:57
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Re: Regarding column family - HBase - [mail # user]
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...Hi there, additionally, see.. http://hbase.apache.org/book.html#regions.arch Š and focus on "9.7.5.4. KeyValue" because the CF name is actually a part of each KV. &...
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Author: Doug Meil,
2012-09-11, 12:21
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Re: HDFS footprint of a table - HBase - [mail # user]
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...Hi there, see... http://hbase.apache.org/book.html#regions.arch Š And in particular focus onŠ "9.7.5.4. KeyValue" On 9/11/12 3:35 AM, "Lin Ma" wr...
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Author: Doug Meil,
2012-09-11, 12:19
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Re: HBase aggregate query - HBase - [mail # user]
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...Hi there, if there are common questions I'd suggest creating summary tables of the pre-aggregated results. http://hbase.apache.org/book.html#mapreduce.example 7.2.4. HBase MapRed...
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Author: Doug Meil,
2012-09-10, 15:21
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Re: Tomb Stone Marker - HBase - [mail # user]
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...Hi there... In this chapter... http://hbase.apache.org/book.html#datamodel .. it explains that the "updates" are just a view. There is a merge happening across CFs an...
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Author: Doug Meil,
2012-09-10, 12:22
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Re: Tomb Stone Marker - HBase - [mail # user]
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...Hi there, See 9.7.5.4. KeyValue... http://hbase.apache.org/book.html#regions.arch Š the tombstone is one of the keytypes. On 9/9/12 5:21 AM, "Monish r" w...
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Author: Doug Meil,
2012-09-09, 13:12
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Re: scan a table with 2 column families. - HBase - [mail # user]
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...Hi there, the scan will merge the results between the CFsŠ for more information see these two chapters in the HBase RefGuide. http://hbase.apache.org/book.html#datamodel h...
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Author: Doug Meil,
2012-09-09, 13:11
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Re: batch update question - HBase - [mail # user]
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...For the 2nd part of the question, if you have 10 Puts it's more efficient t o send a single RS message with 10 Puts than send 10 RS messages with 1 Put apiece. There are 2 words ...
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Author: Doug Meil,
2012-09-06, 18:26
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