Configuration for multilpe nodes

Hi,
I have the following problem: I have my app deployed on Oracle app server with two nodes and the problem is, that I'm not able to configure toplink to work properly on this server with two nodes. Sometimes when I try to write something to the DB (via my app) the changes occur in the DB, but when I try to read them back, my app can't see them. So I suppose that toplink sometimes writes the data via one node of the app server and reads via the another. The same problem occurs also by using the cache, because it seems, that the cache is not synchronized between multiple nodes.
How can I configure toplink to work properly on app servers with multiple nodes?
thnx Martin

Martin,
If you have entity types that are modified and read on multiple nodes of your application then you need to understand and properly configure your locking and caching in TopLink. This article is a good introduction to the topic and the documentation can provide some more specifics.
I would recommend the following order of operations:
1. Ensure you have optimistic locking configured and handled for entity types that are both shared and modified by your application.
2. Based on the volatility of your entity types select the correct caching type. Look at types, size, isolation, and expiration.
3. For operations where you commonly get stale data on volatile entity types consider using refreshing options on your queries. If using version optimistic locking also enable only-refresh-if-newer.
4. Consider cache coordination for those types that are read-mostly to minimize the refreshing required.
Doug

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912919 wrote:
Hi experts
I need some guidance for internal disk configuration for oracle
requirements are for 2 node clustered VM on linux OS OEL
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will RAID 5 be optimal settingFor most definition of "optimal" the answer is "NO"
RAID+10 provides better performance.
Handle:     912919
Status Level:     Newbie
Registered:     Feb 7, 2012
Total Posts:     135
Total Questions:     74 (46 unresolved)
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Configuration for multilpe nodes

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