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Re: What happened in hlog if data are deleted cuased by ttl? - HBase - [mail # user]
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...I can fully understand normal deletion. But, in my point of view, ttl deletion is different than the normal deletion. The insertion of ttl data is recorded in hlog. But the ttl deletion is n...
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Author: yonghu,
2012-08-22, 08:19
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Re: What happened in hlog if data are deleted cuased by ttl? - HBase - [mail # user]
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...Thanks for your response. Can you tell me how the data is deleted due to the ttl? Which module in HBase will trigger deletion? You mentioned the scanner, does it mean the scanner will scan t...
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Author: yonghu,
2012-08-21, 14:42
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Re: Put w/ timestamp -> Deleteall -> Put w/ timestamp fails - HBase - [mail # user]
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...Hi Harsh, I have a question of your description. The deleted tag masks the new inserted value with old timestamp, that's why the new inserted data can'be seen. But after major compacti...
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Author: yonghu,
2012-08-15, 11:48
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Re: What happened in hlog if data are deleted cuased by ttl? - HBase - [mail # user]
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...Hi Hars, Thanks for your reply. If I understand you right, it means the ttl deletion will not reflect in log. On Tue, Aug 14, 2012 at 3:24 PM, Harsh J wrote:...
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Author: yonghu,
2012-08-14, 15:10
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What happened in hlog if data are deleted cuased by ttl? - HBase - [mail # user]
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...My hbase version is 0.92. I tried something as follows: 1.Created a table 'test' with 'course' in which ttl=5. 2. inserted one row into the table. 5 seconds later, the row was deleted. Later...
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Author: yonghu,
2012-08-14, 10:04
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Re: is there anyway to turn off compaction in hbase - HBase - [mail # user]
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...Harsh is right. You find the wrong place. regards! Yong On Sun, Aug 12, 2012 at 1:40 PM, Harsh J wrote: wrote: . l, . l d e?...
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Author: yonghu,
2012-08-13, 13:37
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Re: column based or row based storage for HBase? - HBase - [mail # user]
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...In my understanding of column-oriented structure of hbase, the first thing is the term column-oriented. The meaning is that the data which belongs to the same column family stores continuous...
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Author: yonghu,
2012-08-06, 03:37
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Re: Why Hadoop can't find Reducer when Mapper reads data from HBase? - HBase - [mail # user]
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...Strage thing is the same program works fine in the cluster. By the way, also in pseudo mode when MapReduce read data from Cassandra in Map phase and transferred to Reduce phase, the sa...
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Author: yonghu,
2012-07-13, 05:45
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Why Hadoop can't find Reducer when Mapper reads data from HBase? - HBase - [mail # user]
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...Hello, I tried the program as follows: public class MRTableAccess { static class MRTableMapper extends TableMapper{ private Text rowInfor = new Text(); private Text column =...
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Author: yonghu,
2012-07-12, 11:15
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Re: HBase RegionServer can't connect to Master - HBase - [mail # user]
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...I think you can also use ifconfig command in the VM to see the ip address. And then you can change your ip address in /etc/hosts. Regards! Yong On Wed, May 2, 2012 at 7:21 ...
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Author: yonghu,
2012-05-04, 08:00
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