Core Platform Team/Initiatives/Multi-DC Replication Lag

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Initiative Description

< Initiatives

Summary

Implement multi-DC-aware technologies in MediaWiki to ensure read-after-write consistency

Significance and Motivation

The Chronology Protector mechanism was developed for a single active data center. There are concerns whether it will

Outcomes

MediaWiki uses or can use pt-heartbeat to give more information about replication lag between data centers.

Baseline Metrics

MediaWiki uses Chronology Protector for managing read-after-write consistency, which may not be sufficient for active-active data center.

Target Metrics

Read-after-write consistency in multi-DC environment

Stakeholders

Performance SRE

Known Dependencies/Blockers

None given



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