When Do You Need PDU?
Explore MongoDB recovery scenarios and choose a method based on surviving sources.
MongoDB data recovery overviewFile and Directory Recovery
Read selected checkpoints from frozen sources, retaining catalog bindings and unresolved dependencies.
Database Won’t Start?
Read the frozen WiredTiger data directory when the instance cannot start.
Collection File Damaged and Documents Unreadable?
Probe one WiredTiger file and export parseable records.
Instance Damaged, but Only One Database Needs Recovery?
Select one database for export from a complete WiredTiger directory.
Metadata Damaged and Collection Mappings Lost?
Salvage independent collection relationships when metadata is missing and build read-only recovery views from continuous WT logs.
Historical Candidate Recovery
Extract candidates from retained old values and source chains without automatically reconstructing business time.
Documents Deleted by Mistake?
Extract pre-delete data from retained historical versions and pre-images.
Documents Updated by Mistake?
Extract pre-update data from retained historical versions and pre-images.
Current Documents Are Gone, but Older Versions Survive in History Store?
Read catalog-bound WiredTigerHS.wt with missing-page and modification-chain dependencies retained.
Documents Changed Incorrectly, but Pre-images Survive?
Extract retained old documents and filter operation ranges from oplog source chains.
Need Documents at a Point Before the Incident?
Select incident-time candidates using checkpoint, history-chain and original commit evidence.
Mapped and Image Recovery
Extract parseable content through explicit mappings or bounded scans, retaining unknown attribution.
Files Lost, with Only an Image and Extent Locations Left?
Read scattered pages, overflow and catalog dependencies through declared logical-file ranges.
Only a Disk Image Survives and Collection Files Are Missing?
Extract complete WiredTiger blocks within explicit ranges, retaining unknown attribution and missing dependencies.
Deep Fragments and Multiple Sources
Retain complete-document candidates, field fragments and suspected structures separately, with additional sources and native resume.
Dealing with Data Loss?
PDU provides professional-grade recovery capabilities to help you recover data safely and efficiently.