yugabyte/yugabyte-db

yb-admin: Add Argument for Num Replicas to modify_placement_info

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#7,057 opened on Feb 1, 2021

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Description

See https://docs.yugabyte.com/latest/admin/yb-admin/#modify-placement-info for the current usage of modify-placement-info. Currently this precludes users from specifying how many replicas belong in each availability zone specified. To fix, this make the placement_info field a comma separated list of cloud1.datacenter1.rack1:num_replicas.

Contributor guide

Research direction
Examine the existing modify placement info command implementation in yb admin source code, understand how arguments are parsed (likely using a library like gflags), and modify the placement info field to accept an optional num replicas as part of the comma separated subfield.
Tech stack
c
Domain
backendclidatabasesdistributed systems
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitC programmingCommand line interface usage
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70