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Re: Partitioning dilemma
Posted by: Philopator Ptolemy
Date: July 21, 2010 01:47PM

First of all thanks for the reply.

Below are the answers:
* Access - 99% of time OLTP part of the app adds/accesses very latest sessions/transactions by id (i.e. access on one end). Backoffice accesses latest month of data 95% of time.
* session tables are keyed with GUID but we're considering to change it to auto-inc, transaction table is keyed by auto-inc INT.
*deleting is done only for archiving data older than 6 month
*sessions typically last few hours
*we're trying to use InnoDB for transactional semantics on financial data.

There is one complication though: our system can receive transactions (not db trx) from external systems. We provide idempotent interface meaning that if they post the same trx twice we always return the same result. This means that we need to find their trx or make sure that it's absent. This means that we might need to scan ALL trx table indexed on external_trx_id.

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