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a question about assigning timestamp? - HBase - [mail # user]
...Hello,  specifying timestamp, the server will generate a TS for me! I wonder if the "server" means the master node or regionservers? In my understanding, the server means the regionserv...
   Author: yonghu, 2013-07-13, 08:22
[expand - 2 more] - Re: Deleting range of rows from Hbase. - HBase - [mail # user]
...So, I can understand it as a predefined coprocessor. :)  regards!  Yong   On Thu, Jul 4, 2013 at 1:12 PM, Anoop John  wrote:  ...
   Author: yonghu, 2013-07-04, 11:35
Re: HBase failure scenarios - HBase - [mail # user]
...Hi Lucas,  First, the write request for HBase consists of two parts: 1. Write into WAL; 2. Write into Memstore, when Memstore reaches the threshold, the data in Memstore will be flushed...
   Author: yonghu, 2013-06-11, 06:15
[expand - 1 more] - Re: Poor HBase map-reduce scan performance - HBase - [mail # user]
...Dear Sandy,  Thanks for your explanation.  However, what I don't get is your term "client", is this "client" means MapReduce jobs? If I understand you right, this means Map functio...
   Author: yonghu, 2013-06-05, 18:14
Re: Change data capture tool for hbase - HBase - [mail # user]
...Hello,  I have presented 5 CDC approaches based on HBase and published my results in adbis 2013.  regards!  Yong   On Mon, Jun 3, 2013 at 11:16 AM, yavuz gokirmak  w...
   Author: yonghu, 2013-06-03, 09:41
Re: Doubt Regading HLogs - HBase - [mail # user]
...In this situation, you can set the  logroll.period  to a short value, let's say 3000 and then you can see your log file with current size after 3 seconds.  To Nicolas,  I...
   Author: yonghu, 2013-05-17, 11:40
How can I set heap size for HBase? - HBase - [mail # user]
...Dear All,  I wonder how I can set heap size for HBase and what is the suitable portion compared to whole memory size? And the other question is that how many memory size I need to give ...
   Author: yonghu, 2013-03-11, 11:15
Re: Possible to delete a specific cell? - HBase - [mail # user]
...Hello,  I think you can use HBase org.apache.hadoop.hbase.client.Delete class. It already supported to delete a specific version in a cell, see public Delete deleteColumn(byte[] family,...
   Author: yonghu, 2013-03-07, 20:56
Re: Hbase table with a nested entity - HBase - [mail # user]
...Hello Dastgiri,  I don't think HBase can support original nested schema which you want to define. But you can still store your data in HBase. I figured out several possible solutions: &...
   Author: yonghu, 2013-02-27, 11:06
[expand - 3 more] - Re: coprocessor enabled put very slow, help please~~~ - HBase - [mail # user]
...Ok. Now, I got your point. I didn't notice the "checkAndPut".  regards!  Yong  On Mon, Feb 18, 2013 at 1:11 PM, Michael Segel  wrote:...
   Author: yonghu, 2013-02-18, 12:22
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