mit-pdos/noria

Automatic failover for `View` and `Table` handles

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#105 opened on Sep 20, 2018

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 (1 comment) (0 reactions) (0 assignees)Rust (4,576 stars) (229 forks)batch import
enhancementgood first issuem-distribution

Description

Currently the system can successfully recover from individual machine failures. However, user code must manually re-create any view and table handles that still reference resources on the old machine. This could instead be avoided by having the handles themselves detect lost connections and transparently re-establish new ones. The controller already knows the relevant network addresses, so it should just be a matter of asking it for them whenever a connection breaks.

Contributor guide

Tech stack
rust
Domain
backenddatabase
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.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Rust programmingNoria internalsasync networking
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Examine the current implementation of View and Table handles, likely in files like src/handles.rs, to understand how they connect to resources. Investigate the controller's network address storage in src/controller.rs. Look for any existing reconnection logic or references to failover. Determine how to integrate a transparent reconnection mechanism when a connection error is detected.