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Re: Partition based on dynamic customer list
Posted by: Todd Williams
Date: October 09, 2008 02:14PM

Thank you, but, if i understand hashes and partitioning correctly, that would essentially randomize the physical distribution of my customer data. That would make all queries against a single customer (select * from Customer 001 where timestamp > '2008-01-01') slower than without partitioning.

In case I explained myself poorly, here is a more tabular explanation
Conceptual Data Sample
event_id customer_id event_date {event data columns}
00001 00001 10/8/07 1:00 Stuff Here
00002 00002 10/8/07 1:02 Stuff Here
00003 00001 10/8/07 1:04 Stuff Here

00004 00001 10/8/08 1:06 Stuff Here
00005 00002 10/8/08 1:08 Stuff Here
00006 00003 10/8/08 1:10 Stuff Here
00007 00001 10/8/08 1:12 Stuff Here

Physical Storage
Partition 1 (Customer 00001 - 2007)
event_id customer_id event_date {event data columns}
00001 00001 10/8/07 1:00 Stuff Here
00003 00001 10/8/07 1:04 Stuff Here

Partition 2 (Customer 00001 - 2008)
event_id customer_id event_date {event data columns}
00004 00001 10/8/08 1:06 Stuff Here
00007 00001 10/8/08 1:12 Stuff Here

Partition 3 (Customer 00002 - 2007)

Partition 4 (Customer 00002 - 2008)

...

Partition N (Customer 01234 - 2007)
Partition N+1 (Customer 01234 - 2008)
Partition N+2 (Customer 01234 - 2009)

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Re: Partition based on dynamic customer list
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October 09, 2008 02:14PM


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