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https://issues.apache.org/jira/browse/BLUR-290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13814593#comment-13814593
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Ravikumar commented on BLUR-290:
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You have described the approach better. This is exactly what the patch aims to
do.
I wrote some unit-tests and observed that when multiple threads are indexing,
the "waitToBeVisible" flag is increasing latency of writes.
One more issue is, NRTManager re-opens are really costly, as they involve 2
different IndexReaders open at the same time. [Twice the memory, CPU etc...].
When we have N frequently changing IndexReaders [as in this case], re-opens are
going to be a real pain
> NRT Updates using RAMDirectory & Swap
> -------------------------------------
>
> Key: BLUR-290
> URL: https://issues.apache.org/jira/browse/BLUR-290
> Project: Apache Blur
> Issue Type: New Feature
> Affects Versions: experimental-dev
> Reporter: Ravikumar
> Attachments: BlurFlushingIndexWriter.java, BlurIndexTracker.java,
> BlurRealTimeIndex.java, BlurRealTimeIndexWriter.java,
> BlurRealTimeManager.java, BlurRealTimeManagerReopenThread.java,
> RealTimeTransactionRecorder.java, SlabAllocator.java, SlabRAMDirectory.java,
> SlabRAMFile.java, SlabRAMInputStream.java, SlabRAMOutputStream.java,
> SortingMultiReader.java
>
>
> We have been discussing about handling humungous rows in Blur (BLUR-220).
> Explore the idea of using RAMDirectory at the front, backed by
> persistent-index.
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