[jira] [Resolved] (LUCENE-5124) fix+document+rename DiskDV to Lucene45

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5124?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir resolved LUCENE-5124.
---------------------------------

       Resolution: Fixed
    Fix Version/s: 4.5
                   5.0
    
> fix+document+rename DiskDV to Lucene45
> --------------------------------------
>
>                 Key: LUCENE-5124
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5124
>             Project: Lucene - Core
>          Issue Type: New Feature
>    Affects Versions: 4.5
>            Reporter: Robert Muir
>             Fix For: 5.0, 4.5
>
>
> The idea is that the default implementation should not hold everything in memory, we can have a "Memory" impl for that. I think stuff being all in heap memory is just a relic of FieldCache.
> In my benchmarking diskdv works well, and its much easier to manage (keep a smaller heap, leave it to the OS, no OOMs etc from merging large FSTs, ...)
> If someone wants to optimize by forcing everything in memory, they can then use the usual approach (e.g. just use FileSwitchDirectory, or pick "Memory" for even more efficient stuff).
> Ill keep the issue here for a bit. If we decide to do this, ill work up file format docs and so on. We should also fix a few things that are not great about it (LUCENE-5122) before making it the default.

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