即使最大版本= 1，HBase get也会返回旧值

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问题描述

我希望找到在特定时间段内未更新的列.

I have the desire to find the columns that have not been updated for more than a specific time period.

所以我想对具有时间范围的列进行扫描.HBase的正常行为是您可以在该时间范围内获得最新值(这不是我想要的).

So I want to do a scan against the columns with a timerange.The normal behaviour of HBase is that you then get the latest value in that time range (which is not what I want).

据我了解，HBase的工作方式是，如果将列族中的值的最大版本数设置为"1"，则它应仅保留输入到单元格中的最后一个值.

As far as I understand the way HBase should work is that if you set the maximum number of versions for the values in a column family to '1' it should retain only the last value that was put into the cell.

我发现的与众不同.

如果我在hbase shell中执行以下命令

If I do the following commands into the hbase shell

create 't1', {NAME => 'c1', VERSIONS => 1}
put 't1', 'r1', 'c1', 'One', 1000
put 't1', 'r1', 'c1', 'Two', 2000
put 't1', 'r1', 'c1', 'Three', 3000
get 't1', 'r1'
get 't1', 'r1' , {TIMERANGE => [0,1500]}

结果是这样的:

get 't1', 'r1'
COLUMN                     CELL
 c1:                       timestamp=3000, value=Three
1 row(s) in 0.0780 seconds

get 't1', 'r1' , {TIMERANGE => [0,1500]}
COLUMN                     CELL
 c1:                       timestamp=1000, value=One
1 row(s) in 0.1390 seconds

即使我将最高版本设置为仅1，为什么第二个查询仍返回一个值?

Why does the second query return a value eventhough I've set the max versions to only 1?

我当前在此处安装的HBase版本是HBase 0.94.6-cdh4.4.0

The HBase version I currently have installed here is HBase 0.94.6-cdh4.4.0

cdh4

即使最大版本= 1，HBase get也会返回旧值

问题描述

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