When you boot in UEFI mode, press "e" to edit the boot command line, you have a line to change the memory for dom0.

I did the manual installation via the XVA. It worked for me.

@akurzawa said in Extrlemy slow backup speec = about few MB/s: @nikade said in Extrlemy slow backup speec = about few MB/s: Maybe you saw the same thing I did - I also had major issues with backups. Then in the summer of 2019 I upgraded our XOA (Yes, we have the paid version) and everything was going 3-4x times faster. Must have been some major improvement in the XOA code. So maybe some official info that if you have XO from source Your backup speeds will be as low as 3-4 MB/s? Or what? Sorry if I was unclear - XOA is built from the same sources so there is no difference in that aspect. All tho, there was a big performance issue regarding backups which was resolved. I am using XO from sources in my "private" infrastructure and I can assure you there are no "limits" on purpose.

I'm not sure Unitrends is supporting XCP-ng. Please refer to your backup vendor. Current backup solutions claming to support XCP-ng: https://xcp-ng.org/docs/backup.html

How about doing your own matrix?

@dvdhngs install onto (mdadm/ZFS) RAID 10: no to use (mdadm/ZFS) RAID 10 as SR: yes, of course!

@stormi Edit: Thank you! Got it working and looking good. Troubleshooting non related to Netdata. I remember I change my upstream DNS to Quad 9 recently (1 week ago) and I just change it to Cloudflair (1.1.1.1) and it was the problem. Look like Quad 9 (9.9.9.9) does not like the Mirrors for some reason.

P.S.: I gave my latest "trick" another run: Did a full copy of the VM within xo to the other host. While that job ran, I started the delta backup that finished OK. After the copy was done I deleted the copy and saw - as last time - that the host was coalescing. After finishing the sr's advanced tab is empty again and stayed empty.

@danp said in XCP-ng 7.5.0 final is here: @dblogic said in XCP-ng 7.5.0 final is here: Just tried updating our pool and after updating the master had failed migration of VM (Ubuntu) and then was unable to get VM to start (Missing VDI error). Only solution was to roll master back to 7.4 and everything working again. I ran into a similar situation when I upgraded to 7.5 this week. Did you check to see if there was a non-existent ISO mounted in the CD rom for the VM in question? Thank you. That was my problem. I gave cd empty. Everything works.

Actually, looks like I had already written something about it in the Updates Howto: https://github.com/xcp-ng/xcp/wiki/Updates-Howto#a-special-word-about-xcp-ng-75-76-and-live-migrations

anyone can request a change in https://github.com/xcp-ng/xenadmin/issues

@stormi dd stands for disk dump and does exactly that: Copy a stream of data. Fio however can be configured for precise workloads and read/write mixes, parallel workloads etc. So the first thing will only give you streamline benchmarks, what almost nobody cares about. The second can simulate realworld (VM/database...) workloads, where (controller) Caches and non magnetic storage (Flash, Optane, MRAM...) makes the real difference. Also use big amount of data, since caches can impact small ones extremely. Don't get me wrong: We need them and they can make huge differences, but as long as your benchmarks fully fit into them, it gives your nonsense/fake results. Also (consumer) SSDs start throttling after some 10 to a very few 100 GB of data written. Their caches fill up and they 'overheat'. You can spend days on benchmarks and how to do what.

@stormi Not at all sadly. The Device never passes though..

We can write a simple "driver" like we did for Gluster

@gskger I had followed the article by Eric Eikrem and it did not work for me. Base on my understanding if you add the rules it won’t rename it to anything other then what’s in the static rules. Found this in a RHEL Forum: https://access.redhat.com/discussions/916973

Thanks, that help!!!

I tested on a fresh 2016 install. The install went well and the management agent was installed. I enabled VSS but the VSS snapshots don't seem to be working. To compare I installed the citrix client tools on a fresh 2016 install and VSS does work.