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Posted to issues@quickstep.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/05/21 15:40:00 UTC
[jira] [Commented] (QUICKSTEP-127) Provide access to Quickstep
storage to fetch query results
[ https://issues.apache.org/jira/browse/QUICKSTEP-127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16482634#comment-16482634 ]
ASF GitHub Bot commented on QUICKSTEP-127:
------------------------------------------
GitHub user hbdeshmukh opened a pull request:
https://github.com/apache/incubator-quickstep/pull/355
QUICKSTEP-127 Data provider thread
- Thread used for receiving block requests from clients and sending the
contents of a block back to the client.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hbdeshmukh/incubator-quickstep data-provider-thread
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-quickstep/pull/355.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #355
----
commit 6967ca57c448a17b63e176bf8bc1576066fe893a
Author: Harshad Deshmukh <hb...@...>
Date: 2018-04-06T21:00:54Z
Data Provider thread added.
- Thread used for receiving block requests from clients and sending the
contents of a block back to the client.
----
> Provide access to Quickstep storage to fetch query results
> ----------------------------------------------------------
>
> Key: QUICKSTEP-127
> URL: https://issues.apache.org/jira/browse/QUICKSTEP-127
> Project: Apache Quickstep
> Issue Type: New Feature
> Components: Storage
> Reporter: Harshad Deshmukh
> Assignee: Harshad Deshmukh
> Priority: Major
> Attachments: Network-Client-Reuslt-Exchange.png
>
>
> Quickstep needs a mechanism to provide access to the clients to the query results. We propose a separate thread called "Data Provider Thread" (DPT). This thread can interact with the clients in the following ways:
> Client --> Quickstep : Query text
> Quickstep executes the query and stores the result in temporary storage.
> Quickstep --> client : Signal query completion and send list of block IDs for the result relation.
> Client --> Quickstep (DPT) : Request contents of the result blocks
> Quickstep (DPT) --> client : Send the contents of the requested result blocks.
> Client --> Quickstep (DPT) : Signal completion of reading the results. After receiving this signal, DPT can safely drop the result relation.
>
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