Diagnosing Aerospike Restore Failures: A Step-by-Step Guide

Aerospike Restore Failures: The Immediate Takeaway

If an Aerospike restore operation fails, the root cause is rarely a single command error; it is usually an environmental or integrity issue—missing files, permission blocks, or data corruption. Before retrying, verify the backup file integrity and the target system's prerequisites (space, permissions, version compatibility).

Common Restore Failure Conditions

Understanding the failure signature directs the fix:

Ordered Diagnostic Checks

1. Disk Space: Confirm all target nodes have free space exceeding the backup size plus overhead.
2. Permissions: Verify the Aerospike process user has read access to the backup file and write access to the restore target directory.
3. Integrity: Calculate the backup file checksum and compare it against the original manifest. Do not skip this.
4. Compatibility: Ensure the Aerospike version on the target cluster is equal to or newer than the version used to create the backup.
5. State Check: Pause write traffic to the target namespace before initiating the restore to prevent inconsistent data updates.

Resolution Path Based on Findings

The fix directly addresses the diagnostic finding:

• Missing/Permission Issues: Correct file path and ensure ownership/ACLs grant the Aerospike user necessary access.
• Checksum Mismatch: Re-acquire the backup file from the source; do not force the restore on production data if integrity is critical.
• Version Mismatch: Upgrade the target Aerospike cluster to match or exceed the backup source version.
• Disk Exhaustion: Clear space on all target nodes before re-running the restore.

Concrete Verification Example

Before running the restore, verify file integrity using a standard utility (e.g., sha256sum) on the backup file:

sha256sum /path/to/backup_file.aerospike

Where to run: Shell on the node accessing the backup. Permissions: Read access to the file. Check: Compare the output hash against the manifest hash. Risk: Forcing a restore with a known bad checksum risks data corruption.

Escalation Criteria

Escalate if:

• The backup file cannot be located or is inaccessible across all expected storage locations.
• Version compatibility cannot be resolved by upgrading the target cluster.
• Post-restore cluster health checks (e.g., aerospike info showing consistent namespace counts across all nodes) fail to converge after a stabilization period.

Practical Result Check: After the restore command completes, use cluster information commands to verify that all nodes report matching namespace names and record counts. A successful command does not guarantee convergence.

Limitations

This guide assumes standard Aerospike operational procedures (e.g., using supported CLI/API for restore). Restoring from different namespaces or clusters requires prior schema compatibility verification to prevent metadata conflicts.