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https://issues.apache.org/jira/browse/HDFS-15409?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lisheng Sun updated HDFS-15409:
-------------------------------
Description:
When clientShortCircuitNum is 10, the probability of falling into each
ShortCircuitCache is the same, while the probability of other
clientShortCircuitNum is different.
For example if clientShortCircuitNum is 3, when a lot of blockids of SSR are
***1, ***4, ***7， this situation will fall into a ShortCircuitCache.
Since the real environment blockid is completely unpredictable, i think it is
need to design a strategy which is allocated to a specific ShortCircuitCache.
This should improve performance even more.
was:
When clientShortCircuitNum is 10, the probability of falling into each
ShortCircuitCache is the same, while the probability of other
clientShortCircuitNum is different.
For example if clientShortCircuitNum is 3, when a lot of blockids of SSR are
***1, ***4, ***7， this situation will fall into a ShortCircuitCache.
Since the real environment blockid is completely unpredictable, i think it is
need to design a strategy which is allocated to a specific ShortCircuitCache.
This should improve performance even more.
> Optimization Strategy for choosing ShortCircuitCache
> -----------------------------------------------------
>
> Key: HDFS-15409
> URL: https://issues.apache.org/jira/browse/HDFS-15409
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Lisheng Sun
> Priority: Major
>
> When clientShortCircuitNum is 10, the probability of falling into each
> ShortCircuitCache is the same, while the probability of other
> clientShortCircuitNum is different.
> For example if clientShortCircuitNum is 3, when a lot of blockids of SSR are
> ***1, ***4, ***7， this situation will fall into a ShortCircuitCache.
> Since the real environment blockid is completely unpredictable, i think it is
> need to design a strategy which is allocated to a specific ShortCircuitCache.
> This should improve performance even more.
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