---
title: failover_service | CodeWeaver Docs
description: API reference for codeweaver.engine.services.failover_service
url: "https://docs.knitli.com/api/engine/services/failover_service"
type: static
generatedAt: "2026-04-17T17:21:08.566Z"
---

# failover_service
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# `codeweaver.engine.services.failover_service`
[Section titled “codeweaver.engine.services.failover_service”](#codeweaverengineservicesfailover_service)
Failover service for coordinating primary/backup vector store transitions.

## Class: `FailoverService`
[Section titled “Class: FailoverService”](#class-failoverservice)
Coordinates failover between primary and backup vector stores.

Responsibilities:

 - Monitor primary store health
 - Activate backup when primary fails
 - Sync backup periodically
 - Restore to primary when recovered

### Method: `start_monitoring`
[Section titled “Method: start_monitoring”](#method-start_monitoring)

**

```
start_monitoring()
```

Start health monitoring and automatic failover.

Note: Backup maintenance removed in Phase 2 - new three-phase maintenance loop (in indexing service) handles vector reconciliation and snapshots.