Concurrent Proxy Connections

Does anyone have experience of large numbers of Client connections to a Proxy (say 1000 per machine). None of these connections would be doing very much (they come from a Data Grid) but they would need to stay connected.
I guess the issues are
* Version ( I seem to remember there was some work done on this in 3.6)
* # connections (we have 4000 grid clients + 4 Coherence machines, so 1000 per machine, tho we can run multiple Proxies per machine).
* I know the issue about deserialization being done on the Service thread, hence we might run multiple Proxies per machine.
Any thoughts welcome.
A.

Hi Andrew,
If the client application that will connect to the Coherence cluster is written in Java then you have the option of connect as storage-disabled node. This is what you would likely do for a long-running, web-based application that is collocated with the data grid.
If the application will probably be getting connected and disconnected from the Coherence cluster several times (i.e. many times a day) then even if it's storage disabled it may result in some overhead, as cluster membership information needs to be maintained. This could be aggravated if the client access the cluster across an unreliable, high-latency WAN link. For this kinds of clients, Coherence*Extend allows you to keep cluster membership as stable as possible, and the amount of network traffic caused by repartitioning to a minimum.
If you are using proxy servers, I think the most recommendable approach is to configure Coherence*Extend proxy servers on a dedicated set of machines that serve no other purpose. This will allow you to scale your proxy servers independently from the storage-enabled members of the cluster. It is important to remember, however, that Coherence*Extend proxy servers are full-blown TCMP members, so they should have fast and reliable communication with the rest of the cluster. Ideally, they should be part of the same network switch as the cache servers. I suggest you to take a look at http://download.oracle.com/docs/cd/E15357_01/coh.360/e15726/gs_best.htm#CIHJIDIA
Regarding serialization, note that if some data travels across the proxy connection, it has to travel in the serialization format configured for the proxy service. If you put data into a cache, it has to travel on the network in the serialization format configured for the cache service of the cache. Period. If this rule is not followed, Coherence wouldn’t know what serialization format any piece of data has.
Hope these thoughts are helpful for you.
Thanks,
Cris

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