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XReplicator v1.4.7 Release Notes

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@iamvishnuks iamvishnuks released this 08 Sep 15:58
· 1 commit to main since this release
v1.4.7
4afe3c7

Highlights

  • Filesystem-aware full backups for Linux ext4 and XFS volumes.
  • Client-side content deduplication before upload, reducing repeated data sent over the network.
  • Faster incremental backup processing with batched deduplication lookups.
  • Bounded pipeline memory controls and batch-size tuning for lower-resource deployments.
  • Faster local restore preparation with progress reporting and cancellation support.
  • Improved XFS restore browsing with explicit read-only mount handling.
  • Added benchmark tooling for CPU, memory, disk I/O, network traffic, throughput, and restore checksum validation.

What's Changed by Category

Backup Performance

  • Full backups can identify allocated filesystem ranges instead of reading all free space.
  • Adaptive range merging reduces unnecessary source reads while preserving backup correctness.
  • Full-backup reconciliation captures blocks changed during the scan.
  • Resume handling now respects filesystem-aware backup ranges.
  • Progress reporting reflects the selected filesystem ranges more accurately.

Incremental Backups and Deduplication

  • Client-side deduplication queries are batched before upload.
  • Known chunks can be skipped before payload transmission.
  • Improved deduplication metrics distinguish:
    • Logical data processed
    • Payload data uploaded
    • Client-side wire deduplication
    • Server-side deduplication
  • Controlled Azure testing showed:
    • Clean 1 GiB incremental: 10.97 seconds in the measured run.
    • Small change in a large 4 GiB file: 17.64 MB sent instead of the full logical file.
    • Restored file SHA256 matched the source.

Resource Usage

  • Added configurable pipeline memory budgeting.
  • Reduced batch sizes and worker counts can be used for constrained VMs.
  • Lower-resource profiles trade some full-backup throughput for lower average CPU and controlled buffering.

Restore and Verification

  • Restore preparation now reports restored bytes, speed, and completion state.
  • Preparation can be cancelled safely.

Upgrade Notes

  • Standard deployments require no configuration changes.
  • Filesystem-aware full backups require supported Linux filesystem tooling and a mounted ext4 or XFS filesystem.
  • Backup-server hosts that browse XFS restore images must have XFS kernel support available in addition to xfsprogs.
  • Existing configurations without filesystem-aware full backups continue to use the normal full-device path.
  • Validate the selected batch_size, worker count, and pipeline memory budget against the available VM resources before production rollout.
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