Can limit you the size of lot writeback for a defined number of coherence 3.5?

I am running on Windows 3.5.3p9 consistency.

The cache store is configured to use the schema to write back via the tag reading-writing-support-map-plan.

The batch is activated with a write delay of 5s.

My understanding is that everything that has been newly inserted into the cache more than five seconds ago becomes basically eligible for storage.

Our application through a bit of a cycle of peaks and valleys. Sometimes very little data is inserted at once and is sometimes a lot. This results in quite different lot sizes and size jackpots cause problems on our database from time to time.

I can decrease the delay-write bits to 1 in the hope that this will decrease in turn in the size of the lots, but is there a way to set a specific number, for example, I want never to write 20 in a batch?

Hello

You can just break down that big jackpot in smaller batches (DB transactions) yourself, and you can also decide that you do not want to write more for the moment.

If you get a consistency exception will try again everything that is in the mapping of parameter passed to the storeAll and eraseAll parameter collection. But it doesn't have to be complete, it is expected that you delete entries / items that you persisted successfully.

In this way, you can control the rate of write yourself. In addition, given that the lazywriter thread does not block the processing of the event, so you're kind of danger waiting in these methods if you want a little space resources transactions without return storeAll.

To answer your question:

You can either

-make a physical transaction of 20 elements, remove 20 items on the map, then possibly wait and then continue with more elements of the card as long as it takes place (this gives you the ability to control the rate of transactions).

-Send a physical transaction of more than 20 items to the database, remove the 20 items on the map and then thrown a dummy (in which case coherence-requeues the rest... Take care, after that they are considered as freshly changed entries).

Best regards

Robert

Tags: Fusion Middleware

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