[ovirt-devel] DWH cannot gain hourly history data from db because of the bloody time problem.

hi everybody, Recently, I have tested oVirt Reports. And I encountered a problem about some reports that cannot show data. And then I setup the DWH development environment. I found maybe this reason for missing data is the AggregationToHourly3.5. When data from datacenter_samples_history were inserted to datacenter_hourly_history, u will find nothing happened. Because the select sql before inserting data reads： "SELECT history_id, And then I queried the table of datacenter_samples_history & history_configuration (has the field of lastHourAggr) in the db of ovirt_engine_history. The results are as follows: ovirt_engine_history=# select * from history_configuration; ovirt_engine_history=# select *history_datetime* from history_datetime ---------------------------- 2014-*11-13* 03:07:00.23+08 2014-11-13 03:08:00.238+08 2014-11-13 03:09:00.229+08 2014-11-13 03:10:00.221+08 2014-11-13 03:11:00.229+08 2014-11-13 03:12:00.221+08 2014-11-13 03:13:00.237+08 2014-11-13 03:14:00.22+08 2014-11-13 03:15:00.221+08 2014-11-13 03:16:00.238+08 2014-11-13 03:17:00.238+08 Obviously， history_datetime < lastHourAggr , the data will never be inserted to the datacenter_hourly_history. And the place where I bold is the root cause of the error. Then , I try to update the *lastHourAggr *in the table of history_configuration. Reports works successfully. However, the lastHourAggr will change to 2014-11-15 afterwards. But u know Today is 2014-11-14 ! I have no idea about why the value of lastHourAggr is 2014-11-15. Would u help me solve this problem. Thanks a lot !