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[HBASE-5717] Scanner metrics are only reported if you get to the end of a scanner - HBase - [issue]
...When you turn on Scanner Metrics, the metrics are currently only made available if you run over all records available in the scanner. If you stop iterating before the end, the values are nev...    Author: Ian Varley , 2012-04-13, 18:32
[HBASE-5770] Add a clock skew warning threshold - HBase - [issue]
...There's currently an exception thrown by the master when a region server attempts to start up with clock skew greater than some configured amount (defaulting to 30 seconds). However, it'd be...    Author: Ian Varley , 2012-04-13, 18:32
[expand - 1 more] - Schema Updates: what do you do today? - HBase - [mail # user]
...Thanks, Andy. Yeah, a tool that compares a schema definition with a running cluster, and gives you a way to apply changes (without offlining, where possible), would be pretty sweet.  An...
   Author: Ian Varley , 2012-04-09, 19:39
[expand - 1 more] - Key Design Question for list data - HBase - [mail # user]
...Great, glad to help Derek! One clarification, on space usage: on disk, the row key (and column family) is repeated for every cell. So if you have rows like:  user123:  columnfamily...
   Author: Ian Varley , 2012-04-04, 18:15
HBase & BigTable + History: Can it run decently on a 512MB machine? What's the difference between the two? - HBase - [mail # user]
...DS,  HBase is an open source project, so you can read the source code and make that determination for yourself. It was first created based on the same ideas in the Bigtable paper (publi...
   Author: Ian Varley , 2012-03-06, 00:48
Scanning the last N rows - HBase - [mail # user]
...Yes, you do have to worry about efficiency. If your rows aren't ordered in the table (by rowkey) according to the update date, the server will be having to scan the entire table. Your filter...
   Author: Ian Varley , 2012-03-02, 21:49
[expand - 1 more] - Seeking HBase schema design examples - HBase - [mail # user]
...Yes, that's a great one - and it's one of the few schemas I've found that's published online and well explained. I think we need more of that! :)  Ian  On Feb 23, 2012, at 1:23 AM,...
   Author: Ian Varley , 2012-02-23, 14:16
Solr & HBase - Re: How is Data Indexed in HBase? - HBase - [mail # user]
...One minor clarification:  HBase is primarily built for retrieving a single row at a time based on a predetermined and known location (the key).  Substitute that with: "HBase is pri...
   Author: Ian Varley , 2012-02-22, 18:18
Corresponding table in Hbase - HBase - [mail # user]
...Adarsh,  HBase doesn't have the concept of a globally unique auto-incrementing "ID" column; that would require that all PUTs to any region of a table first go through some central ID au...
   Author: Ian Varley , 2012-02-22, 15:32
Flushing to HDFS sooner - HBase - [mail # user]
...Manuel, do you have the WAL disabled? If not, theoretically, what "should" have happened here was that the WAL would have been synced to disk when the row was written (flush or no flush), an...
   Author: Ian Varley , 2012-02-19, 16:00