Troubleshooting backup performance bottlenck and confused about backup steps

[CJ]

I have two pools. My original pool which has 2.5G and my new pool which has 10G. All of my network storage is on 10G. The 2.5G pool uses local storage while the 10G pool is all NFS mounts. My backup speed is limited to ~150MBps, which I had assumed was due to 2.5G but even after switching to 10G I'm still seeing the same speeds. While attempting to troubleshoot where the bottleneck in this is, I've become quite confused about what occurring during a backup.

I've looked through the documentation but the most detail I can find is the diagram on the proxy page and it only shows that the backup goes through XOA. https://xen-orchestra.com/docs/proxy.html

Is there a similar diagram showing the steps involved which includes the pool hosts and SRs?

[CJ]

I forgot to mention that the Incremental Backup page has a typo in one of it's links.

https://xen-orchestra.com/docs/delta_backups.html#nbd-enabled-backups

There is a missing / between com and blog.

https://xen-orchestra.comblog/xen-orchestra-5-81/ should be https://xen-orchestra.com/blog/xen-orchestra-5-81/

[Danp]

@CJ Thanks for the report on the problematic link. I'll submit a PR to fix it.

[Danp]

@CJ Here's a different image that came from https://xen-orchestra.com/blog/backup-proxies/ --

What value are you using for concurrency (under the backup job's Advanced Settings)?

[CJ]

@Danp That's the same image I referenced but with everything at a single site. I'm looking for details regarding the hosts and SRs. In the documentation that's all hidden inside that green XenServer XCP-ng box.

My concurrency is only 1 right now because I'm trying to find my bottleneck. Regardless of what it's set to, I'm stuck at ~150MBps for the whole backup job. But that's just what the UI reports. Looking at the network stats I see different things moving anywhere from ~50MBps to over 500MBps.