[jira] [Updated] (LUCENE-4678) FST should use paged byte[] instead of single contiguous byte[]

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-4678?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless updated LUCENE-4678:
---------------------------------------

    Attachment: LUCENE-4678.patch

Patch, I think it's close to ready (no format change for the FST so no back compat).
                
> FST should use paged byte[] instead of single contiguous byte[]
> ---------------------------------------------------------------
>
>                 Key: LUCENE-4678
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4678
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/FSTs
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 4.2, 5.0
>
>         Attachments: LUCENE-4678.patch, LUCENE-4678.patch
>
>
> The single byte[] we use today has several limitations, eg it limits us to < 2.1 GB FSTs (and suggesters in the wild are getting close to this limit), and it causes big RAM spikes during building when a the array has to grow.
> I took basically the same approach as LUCENE-3298, but I want to break out this patch separately from changing all int -> long for > 2.1 GB support.

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