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RE: Results from a Map/Reduce - HBase - [mail # user]
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...If there's a customer waiting for the query, then you wouldn't want to have them what for an MR job. So what you're saying is you want to change this from on-demand scans to us i...
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Author: Jonathan Gray,
2010-12-17, 21:19
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RE: Results from a Map/Reduce - HBase - [mail # user]
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...There's not much in the way of examples for coprocessors besides the implem entation of Security. Check out HBASE-2000 and go from there. If you're f airly new to HBase, then wai...
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Author: Jonathan Gray,
2010-12-17, 20:00
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RE: question about multi-transaction queries - HBase - [mail # user]
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...Yes, some kind of running JVM. I would not recommend starting a JVM for ea ch query :) ll help 's ts, t s, e: e...
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Author: Jonathan Gray,
2010-12-17, 19:57
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RE: question about multi-transaction queries - HBase - [mail # user]
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...All of my experience doing something like this was with straight Java. There are MultiGet and MultiPut capabilities in the Java client that will h elp you out significantly. I pl...
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Author: Jonathan Gray,
2010-12-17, 19:15
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RE: Results from a Map/Reduce - HBase - [mail # user]
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...Hey Peter, That System.exit line is nothing important, just the main thread waiting fo r the tasks to finish before closing. You're interested in having the MR job return a singl...
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Author: Jonathan Gray,
2010-12-17, 19:12
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RE: [RFC] Deployment layout and server configurations - HBase - [mail # user]
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...Hey Imran, This looks reasonable but it's hard to say without knowing what the read/wr ite workload is like. You say all searches are done using Solr... will tha t also be hosted...
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Author: Jonathan Gray,
2010-12-17, 06:11
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RE: Recommended setup for a small cluster - HBase - [mail # user]
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...That sounds right. One node would have NN, HMaster, and ZK. Others would have DN and RS. You could put the SNN on any of the slave nodes I suppose. se...
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Author: Jonathan Gray,
2010-12-15, 06:19
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RE: Confusion on the role of regionserver - HBase - [mail # user]
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...The 5 RS will be connecting to all 10 DNs. However, when writing to HDFS t he first replica always goes to the local node. Because of this, the 5 DNs that are hosting the 5...
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Author: Jonathan Gray,
2010-12-15, 04:56
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RE: Composite key, scan on partial key - HBase - [mail # user]
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...There might be a little confusion. Specifying start/stop rows vs. scanning all rows with a filter... yes, clea rly the start/stop is far more efficient. What Ryan is talking abou...
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Author: Jonathan Gray,
2010-12-15, 04:53
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RE: Modifying existing table entries - HBase - [mail # user]
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...Applying a filter can prevent all rows from being sent to the client (or MR task) but HBase will still be doing a full table scan. This can certainly help but in the end yo...
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Author: Jonathan Gray,
2010-12-15, 04:51
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