[ZOOKEEPER-4425] 4lw Command: On demand snapshot

• Type: New Feature
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: server
• Labels: pull-request-available
• Flags: Patch

Language

Java

• Assignee: Unassigned
• Reporter: Pablo Francisco Pérez Hidalgo
• Created: 14/Dec/21 16:45
• Updated: 24/Oct/22 09:28

Description

Working with disaster recovery scenarios at work, we found that having the capacity of telling a ZooKeeper instance to take a snapshot, thus dumping into files the contents of its view of the internal database, could be a last resource hatch out of potential data loss.

As an example, imagine that all the voting members of the ensemble are wiped out due a wrong deployment configuration change. A single surviving observer could hold on its memory the last copy of most recently updated the ensemble data. Sending it a snap four letter words command that forced it to save a snapshot of that information into disk could be a very convenient way of recovering the database.

 

This issue aims to discuss the addition of this feature and serve as the gate for a an already available patch providing this feature.

Issue Links

• links to: GitHub Pull Request #1785