 Analysis Server Incremental Update on Changing Dimensions -
09-08-2004
, 03:32 AM
Dear Anyone,
Our OLAP users reported inconsistencies with their
reports. To better describe the problem please refer
below:
Item 1 -- 2
Item 2 -- 5
Item 3 -- 3
Item 4 -- 1
Total -- 15
We noticed the following error in the application event
log:
Error during lazy aggregation of partition
Broadcast_Response_2004_07 in cube Broadcast_Response:
Error during lazy aggregation of partition
Broadcast_Response_2004_06 in cube Broadcast_Response:
Error during lazy aggregation of partition
Broadcast_Response_2004_08 in cube Broadcast_Response:
The errors above has led us to the following knowledge
base articles:
http://support.microsoft.com/default.aspx?scid=kb;EN-
US;325289
http://support.microsoft.com/default.aspx?scid=kb;en-
us;259677
http://support.microsoft.com/default.aspx?scid=kb;en-
us;820358
Our OLAP Application Setup
Cubes: 2
Cube Partitions: Monthly
Average Number of Records per Partition: 23M
Active Partitions: 8
Distinct Count: Yes
Virtual Cubes: 1
Changing Dimension: 2
Operation: Incremental Update of All Partitions Everyday
Incremental Process of Cubes Every Day
BI Accelerator: Yes
Our main concern is that the knowledge base articles
instructs us to re-aggregate the entire cube in order for
us to work around the problem. The problem is we
incrementally update our changing Dimensions everyday. To
add to this, we measured how long it takes to full re-
aggregate one partition - it took more than 45 minutes to
finish one. Totalling all the time it takes for our
process to finish, the time involved in the suggested
work around would be impractical for us.
I hope you give us some insights and suggestions with
this problem.
Thank You
P.S.
If we remove all user designed aggregations from all our
cubes, will we still end up with the same problems?
--------------------------------------------------------
Joseph R. Ollero
MCP, MCSD
Associate Technical Specialist
dB Wizards
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