Best way to query cache - get() vs filters?

Hi,
I am in a dillemma. Whether to use NamedCache.get() or entrySet(filter) methods to query the cache. Please guide me..
My understanding is that when using
1. get() or getAll(), Coherence checks whether the entry is in the cache, if it does exist in the cache, Coherence get its from the DataStore
2. entrySet(Filters), Coherence just checks the cache and returns results based on whats available in the cache.
In that case, Isnt it better to use get instead of entrySet in a case where one is not sure whether up to date data is available in the Cache?
1. What is the difference between using a get and using entrySet ?
2. How does one make sure that up to date data is available in the cache when not using a write-behind scenario?
I am newbie...Gurus, please guide me..

sjohn wrote:
Hi,
I am in a dillemma. Whether to use NamedCache.get() or entrySet(filter) methods to query the cache. Please guide me..
My understanding is that when using
1. get() or getAll(), Coherence checks whether the entry is in the cache, if it does exist in the cache, Coherence get its from the DataStoreThat's not the relevant part.
In this case because you specified the keys to the entries, Coherence knows exactly where each entry resides, and optimally communicates with the owner nodes (1 network call / owner node) to get the data, and it will return the data without deserialization on the owner node.
2. entrySet(Filters), Coherence just checks the cache and returns results based on whats available in the cache.
In this case, depending on the actual filter (hierarchy) Coherence has to contact all nodes (if you did not filter it with KeyAssociatedFilter or PartitionFilter), which is not scalable, then depending on the filter(s) used it may have to deserialize possibly all cached entries (which is expensive) to evaluate the filter. On the other hand this method is usable for non-key-based access, which the get/getAll is not able to do.
In that case, Isnt it better to use get instead of entrySet in a case where one is not sure whether up to date data is available in the Cache?
1. What is the difference between using a get and using entrySet ?Heaven and earth...
2. How does one make sure that up to date data is available in the cache when not using a write-behind scenario?
You have to preload it, or trigger fetching it from a cache-store.
Best regards,
Robert

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