[
https://issues.apache.org/jira/browse/PHOENIX-2417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15096516#comment-15096516
]
Ankit Singhal edited comment on PHOENIX-2417 at 1/13/16 4:50 PM:
-----------------------------------------------------------------
PFA, wip patch
Review comments incorporated:-
1. update array at the end of every collection.
2. Iterate over guideposts instead of converting into list in
baseResultIterators.
There are 1-2 test cases started failing , I'll work on it tomorrow. as it is
late at my side.
I'll create a pull request once PHOENIX-2143 is in master.
was (Author: ankit.singhal):
PFA, wip patch
Review comments incorporated:-
1. update array at the end of every collection.
2. Iterate over guideposts instead of converting into list in
baseResultIterators.
There are 1-2 test cases started failing , I'll work on it tomorrow. as it is
late at my side.
> Compress memory used by row key byte[] of guideposts
> ----------------------------------------------------
>
> Key: PHOENIX-2417
> URL: https://issues.apache.org/jira/browse/PHOENIX-2417
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: James Taylor
> Assignee: Ankit Singhal
> Fix For: 4.7.0
>
> Attachments: PHOENIX-2417.patch, PHOENIX-2417_encoder.diff,
> PHOENIX-2417_v2_wip.patch
>
>
> We've found that smaller guideposts are better in terms of minimizing any
> increase in latency for point scans. However, this increases the amount of
> memory significantly when caching the guideposts on the client. Guidepost are
> equidistant row keys in the form of raw byte[] which are likely to have a
> large percentage of their leading bytes in common (as they're stored in
> sorted order. We should use a simple compression technique to mitigate this.
> I noticed that Apache Parquet has a run length encoding - perhaps we can use
> that.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
