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https://issues.apache.org/jira/browse/BLUR-290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13837424#comment-13837424
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Ravikumar commented on BLUR-290:
--------------------------------
I thinking through another idea.
Lucene has NRTCachingDirectory, which basically wraps a Disk-Directory as a
delegate. All incoming writes are written in RAM segments.
Reads just work normally. This is really useful for frequent NRT re-opens and
will perform very well under high write load, thereby automatically addressing
Blur-295 issue also ["Long pause during NRT re-opens]
We also don't need a big solution I previously proposed and instead all of it
can be elegantly handled with NRTCachingDirectory, in a single IndexWriter
itself.
Please let me know your views on this. If fine, I shall re-work the patch
towards this approach.
> 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: BlurFieldsConsumer.java, BlurFieldsConsumer.java,
> BlurFieldsConsumer.java, BlurFlushingIndexWriter.java, BlurIndexTracker.java,
> BlurPostingsConsumer.java, BlurPostingsConsumer.java,
> BlurPostingsFormat.java, BlurPostingsFormat.java, BlurRealTimeIndex.java,
> BlurRealTimeIndex.java, BlurRealTimeIndexTest.java,
> BlurRealTimeIndexWriter.java, BlurRealTimeManager.java,
> BlurRealTimeManagerReopenThread.java, BlurRowCodec.java, BlurRowCodec.java,
> BlurSegmentInfoFormat.java, BlurSegmentInfoWriter.java,
> BlurTermsConsumer.java, BlurTermsConsumer.java,
> CompressingRowIndexReader.java, CompressingRowIndexWriter.java,
> CompressingRowReader.java, CompressingRowReader.java,
> CompressingRowReader.java, CompressingRowWriter.java,
> CompressingRowWriter.java, CompressingRowWriter.java,
> GrowableByteArrayDataOutput.java, PrimeDocCache.java,
> RealTimeTransactionRecorder.java, RealTimeTransactionRecorder.java,
> RowCache.java, RowDocsCollector.java, RowDocsCollector.java,
> RowReaderCache.java, RowReaderCache.java, SlabAllocator.java,
> SlabRAMDirectory.java, SlabRAMFile.java, SlabRAMInputStream.java,
> SlabRAMOutputStream.java, SortingMultiReader.java, SortingMultiReader.java,
> TestCompressingRowWriter.java, TestCompressingRowWriter.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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