How do I find out that Overflow is being used

Question

We have configured Overflow for one of our Caches using bdb.
I have a few questions with regard to the overflow scheme
1. How do I test that Overflow is being used indeed ?
2. Where does bdb store its data, is it on the file system or in memory ? Is there a way to see the data in the bdb scheme ?
3. Following is the configuration we are using, is that the right way to use overflow ?
Thanks,
J
<distributed-scheme>
<scheme-name>dist-person</scheme-name>
<service-name>dist-person-service</service-name>
<thread-count>15</thread-count>
<partition-count>6421</partition-count>
<serializer>
<class-name>
com.tangosol.io.pof.ConfigurablePofContext
</class-name>
<init-params>
<init-param>
<param-type>string</param-type>
<param-value>custom-types-pof-config.xml</param-value>
</init-param>
</init-params>
</serializer>
<backing-map-scheme>
<read-write-backing-map-scheme>
<internal-cache-scheme>
<overflow-scheme>
<front-scheme>
<local-scheme>
<high-units>968000000</high-units>
<low-units>726000000</low-units>
<unit-calculator>BINARY</unit-calculator>
<expiry-delay>5d</expiry-delay>
</local-scheme>
</front-scheme>
<back-scheme>
<external-scheme>
<scheme-ref>DiskOverflowScheme</scheme-ref>
</external-scheme>
</back-scheme>
</overflow-scheme>
</internal-cache-scheme>
<cachestore-scheme>
<class-scheme>
<class-name>com.sac.triton.stores.CustomCacheLoader</class-name>
<init-params>
<init-param>
<param-type>java.lang.String</param-type>
<param-value>com.entities.Person</param-value>
</init-param>
</init-params>
</class-scheme>
</cachestore-scheme>
<read-only>true</read-only>
</read-write-backing-map-scheme>
</backing-map-scheme>
<autostart>true</autostart>
</distributed-scheme>
<external-scheme>
<scheme-name>DiskOverflowScheme</scheme-name>
<bdb-store-manager></bdb-store-manager>
</external-scheme>

Answer 1

Hello,
BDB will store its data on the file system. You can specify the locatino with the following:
<bdb-store-manager>
<directory>{FILE_LOCATION}</directory>
</bdb-store-manager>
As far as I am aware you can't see the data in the bdb scheme.
Regards,
Nick