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https://issues.apache.org/jira/browse/BLUR-5?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13475175#comment-13475175
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Doug Cutting commented on BLUR-5:
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The IOContext looks promising. One might, e.g., always cache i/o that occurs
in a READ or FLUSH context, but only cache MERGE-related i/o when the
estimatedMergeBytes is substantially smaller than the cache size (to keep small
merges in the cache).
> Write through caching for the BlockCache
> ----------------------------------------
>
> Key: BLUR-5
> URL: https://issues.apache.org/jira/browse/BLUR-5
> Project: Apache Blur
> Issue Type: Improvement
> Reporter: Aaron McCurry
>
> This will allow for better NRT update performance because the writer will not
> have to read the NRT segments from HDFS.
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