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https://issues.apache.org/jira/browse/SAMZA-256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14052034#comment-14052034
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Chinmay Soman commented on SAMZA-256:
-------------------------------------
Currently, LevelDbKeyValueStore range seems to implement an iterator that
returns all elements : from(inclusive) => to(inclusive)
However, most Java/Guava util classes that implement some form of 'SortedMap'
have a subMap that returns elements : from(inclusive) => to(exclusive)
What is the correct semantic for this API ? (all inclusive) ? or (all inclusive
except the last element in that specified range) ?
> Provide in-memory data store implementation
> -------------------------------------------
>
> Key: SAMZA-256
> URL: https://issues.apache.org/jira/browse/SAMZA-256
> Project: Samza
> Issue Type: Improvement
> Components: kv
> Affects Versions: 0.6.0
> Reporter: Jakob Homan
> Assignee: Chinmay Soman
> Fix For: 0.8.0
>
>
> The sole current kv store, LevelDbKeyValueStore, works well when the amount
> of data to be stored is prohibitively large to keep it all in memory.
> However, in cases where the state is small enough to comfortably fit in
> whatever memory is available, it would be better to provide an in-memory
> implementation. This can be backed by either a native Java class, or perhaps
> a Guava class, if that is found to scale better (or, of course, the backing
> implementation could be configurable).
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