automatic writing to disc option?

Hello

I was wondering, is there any sort of option in TimesTen who empty the changes to the database on the disk, as soon as possible? This option can be useful in case of breakdowns, say, if a server goes down or has a power failure, minimize the amount of lost changes, but at a cost in performance.

TimesTen provides properties full ACIDS, that you can use, and DurableCommit is an attribute that you can set for your connection. but as you say, it is a significant performance cost. There is also a built-in procedure called ttDurableCommit which can be called from the application. Call this builtin empty the current transaction and all transactions already established in the disk transaction log buffer.

Note that the transaction log manager has a newspaper background flush that empty continuous transaction on disk log data as fast as it can, so you don't really have to do the periodic durablecommit call you.

For high availability, you can use 2-SAFE replication to ensure no data loss with any single point of failure. Using replication 2SAFE is actually faster than commit sustainable on every transaction.

Using DurableCommit to guard against the loss of data due to power failure isn't a good use of the TimesTen.

Susan

Tags: Database

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