Backup speed issues
VKB-1129Reference
- 📦 Applies to
- Xen Orchestra
- 🗓️ Created
- 2024-10-03
- 🔄 Updated
- 2024-10-03
- 🏷️ Tags
Backup speed
The most impactful parameters for backup are:
- Latency between XOA and the host, and from XOA to the remote.
- Host performance and resources.
- XOA VM resources.
- Remote performance.
- Network speed does not impact backup speed a lot, unless you are very limited, because the bottleneck is elsewhere.
Ways to improve
- The backup process always goes through Pool, then XOA, then Remote, so check that all your networks are set accordingly.
- Verify that you are using the right network for backup in Pool, Advanced.
- If you have backup jobs with multiple remotes, use a mirror job for the slower remote, it will be more efficient.
- For delta backup, test different levels of VM concurrency / NBD concurrency.
- For full backup, you can test compression: backup will be slower but you will have less data to back up, so overall performance can be better.
- Depending on the remote: test block storage (more files, more writes, less copy, less data).
- Use a XOA proxy.
- Add resources to the XOA VM.
- Add RAM to the Dom0.
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