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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17907) [C++] End to end Scans from Client/Table
Date Sat, 03 Jun 2017 00:06:04 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Enis Soztutar updated HBASE-17907:
----------------------------------
    Attachment: hbase-17907_v2.patch

Attaching v2 patch, which is more complete compared to the v1 patch. The goal is to get this
version committed and do further improvements / testing on a follow up patch since every day
the patch is growing bigger and bigger.  

The patch implements these: 
 - Client-side Scan API, including {{ResultScanner}} and {{Table::Scan()}}. 
 - Changes to Result, Cell, Scan and various other small changes in related APIs
 - {{AsyncClientScanner}}, {{AsyncScanRpcRetryingCaller}}, etc to implement retrying RPCs
for opening up scanners to regions, and driving the Scan next calls respectively. Normal scan
iteration over multiple regions is a ping-pong between these two classes, where the AsyncClientScanner
will open a scanner  against the next region and give it to the AsyncScanRpcRetryingCaller
to drive the scan by calling scan-next repeatedly. 
 - {{ScanResultsCache}}, {{ScanController}}, {{ScanResumer}} etc to control the scan behavior
and implement scan pre-fetching. 
 - {{AsyncTableResultScanner}} to translate from async version of the scans to the blocking
version of ResultScanner. 
The class structure and the general "architecture" of the async scan is borrowed from the
Java async client so that we can re-use the same logic in following the code. 

> [C++] End to end Scans from Client/Table
> ----------------------------------------
>
>                 Key: HBASE-17907
>                 URL: https://issues.apache.org/jira/browse/HBASE-17907
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Enis Soztutar
>             Fix For: HBASE-14850
>
>         Attachments: hbase-17907-v1.patch, hbase-17907_v2.patch, hbase-scan-v0.patch
>
>
> Scan support from client, including the implementation for retrying RPCs, scanner management,
scan result caching, prefetch, Client side interfaces and all related code. 



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