[infinispan-issues] [JBoss JIRA] Commented: (ISPN-1341) Eviction treats FIFO as LRU

[Jozef Vilkolak (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622378#comment-12622378 ] 

Jozef Vilkolak commented on ISPN-1341:
--------------------------------------

Since FIFO is not supported any more it probably should be mentioned in the eviction documentation.

> Eviction treats FIFO as LRU
> ---------------------------
>
>                 Key: ISPN-1341
>                 URL: https://issues.jboss.org/browse/ISPN-1341
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Eviction
>    Affects Versions: 5.0.0.FINAL
>            Reporter: Jozef Vilkolak
>            Assignee: Manik Surtani
>
> When a cache is created with eviction strategy set to FIFO it is actually treated as being LRU. This can be seen in org.infinispan.container.DefaultDataContainer.java.
> Functional test for FIFO eviction can be found at [https://svn.devel.redhat.com/repos/jboss-qa/edg/edg-functional-tests/trunk/] in the eviction-strategy module.
> Basically what the test does is insert 3 values into the cache then retrieves the first value(to differentiate FIFO and LRU) and inserts 4th value which sets eviction in motion because of maxEntries=3. 
> I would expect the first entered value ("A") to be evicted instead it evicts the second ("B").
> It uses the following cache configuration:
> {code:xml}
> <local-cache 
>     name="fifo"
>     start="EAGER"
>     batching="false"
>     indexing="NONE">
>     <locking
>         isolation="REPEATABLE_READ"
>         acquire-timeout="20000"
>         concurrency-level="500"
>         striping="false" />
>     <eviction 
>         strategy="FIFO" 
>         max-entries="3" 
>         interval="2000"/>
> </local-cache>
> {code}

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