On 17 Dec 2009, at 12:43, philippe van dyck wrote:

Hi all,

i am searching for the perfect configuration on EC2 and I have a question about the asynchronous operations.

I would like to chain two caches 1) one filecache 2) one s3cache.

Keep in mind the S3CacheStore will (soon) be replaced with a CloudCacheStore. More generic and based on better JClouds APIs.

I would also like the transaction to return ASAP when the filecache has committed, and the s3cache to commit the same transaction, but asynchronously.

Is it 'configurable' ?

Right now I use this ... but it is not working (I have to wait for the s3cache to finish what it seems to be an async operation)

Your cfg *should* do as you expect, due to the <async > element in the 2nd store. Perhaps you could write a unit test to prove this, along the lines of ChainingCacheLoaderTest in trunk, to ensure that one CS blocks and the other does not (maybe using 2 different DumyCacheStores, or mocks)?

Cheers

Manik

<infinispan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="urn:infinispan:config:4.0">
<global>
<transport
transportClass="org.infinispan.remoting.transport.jgroups.JGroupsTransport">
<properties>
<property name="configurationFile" value="jgroups.xml" />
</properties>
</transport>

</global>
<default>
<transaction
transactionManagerLookupClass="org.infinispan.transaction.lookup.DummyTransactionManagerLookup" />
<clustering mode="distribution">
<l1 enabled="true" lifespan="100000" />
<hash numOwners="2" rehashRpcTimeout="120000" />
</clustering>
<loaders passivation="false" shared="true" preload="false">

<loader class="org.infinispan.loaders.file.FileCacheStore"
fetchPersistentState="true" ignoreModifications="false"
purgeOnStartup="true">
<properties>
<property name="location" value="/tmp" />
</properties>
</loader>

<loader class="org.infinispan.loaders.s3.S3CacheStore"
fetchPersistentState="false" ignoreModifications="false"
purgeOnStartup="false">

<properties>
<property name="awsAccessKey" value="***" />
<property name="awsSecretKey" value="***" />
<property name="bucketPrefix" value="store" />
</properties>
<async enabled="true" threadPoolSize="10" />
</loader>
</loaders>
<eviction strategy="LRU" wakeUpInterval="10000" maxEntries="1000" />
<unsafe unreliableReturnValues="true" />
</default>
</infinispan>

Thanks,

Phil
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