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https://issues.apache.org/jira/browse/HIVE-12050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HIVE-12050:
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Description: With directory listing, ETL vs BI decision, local cache,
metastore cache, with PPD, file footers, and combination thereof (e.g. most
splits are processed via metastore PPD but some files are not cached and we
need to make ETL vs BI decision), some of which are blocking and some not, -I
want to write ORC split generation in Erlang- strategies are no longer the best
model to organize all the work. Some messaging or task queue based model might
be better where each worker that does a blocking operation (dir listing, file
read, metastore call, etc.) generates a list of things, and things are further
processed by other workers until all things are splits and there are no more
other things to process. (was: With directory listing, ETL vs BI decision,
local cache, metastore cache, with PPD, file footers, and combination thereof
(e.g. most splits are processed via metastore PPD but some files are not cached
and we need to make ETL vs BI decision), some of which are blocking and some
not, -I want to write ORC split generation in Erlang- strategies are no longer
the best model to organize all the work. Some messaging or task queue based
model might be better where each work item that is blocking (dir listing, file
read, metastore call, etc.) generates list of things, and things are further
processed until all things are splits and there are no more other things to
process.)
> change ORC split generation to use a different model
> ----------------------------------------------------
>
> Key: HIVE-12050
> URL: https://issues.apache.org/jira/browse/HIVE-12050
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
>
> With directory listing, ETL vs BI decision, local cache, metastore cache,
> with PPD, file footers, and combination thereof (e.g. most splits are
> processed via metastore PPD but some files are not cached and we need to make
> ETL vs BI decision), some of which are blocking and some not, -I want to
> write ORC split generation in Erlang- strategies are no longer the best model
> to organize all the work. Some messaging or task queue based model might be
> better where each worker that does a blocking operation (dir listing, file
> read, metastore call, etc.) generates a list of things, and things are
> further processed by other workers until all things are splits and there are
> no more other things to process.
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