apache/pinot

Add API to update ZK metadata of a segment

Open

#10,458 opened on Mar 22, 2023

View on GitHub
 (10 comments) (1 reaction) (0 assignees)Java (1,234 forks)batch import
enhancementgood first issuehelp wanted

Repository metrics

Stars
 (4,937 stars)
PR merge metrics
 (Avg merge 6d 7h) (186 merged PRs in 30d)

Description

Looking at BaseSingleSegmentConversionExecutor, I see that it always uploads the segment, even if the segment did not change but only the metadata (e.g., updating custom map for some minion task ran on the segment). The controller then checks that the segment did not change and only updates ZK.

The network transfer of the segment from minion task to controller seems wasteful in this case, since the minion task should already know that the segment did not change. If there is an API to simply update ZK metadata, then that will be more efficient.

Contributor guide

Research direction
Examine BaseSingleSegmentConversionExecutor and controller metadata update logic to identify where a direct ZK metadata update API can be introduced.
Tech stack
java
Domain
backenddatabasedistributed systems
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
JavaApache PinotApache ZooKeeper
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50