Posts made by maxcuttins

What amazing support

kids aren't alright

@petr-bena said in XCP 8.1 with Kernel 5.3 :

@maxcuttins current kernel supports RBD, which feature are you missing? I am using kernel RBD and it works OK

"Exclusive Lock" is not included in the 4.19 kernel.
So it is for "object-map" and "fast-diff".

@olivierlambert said in XCP 8.1 with Kernel 5.3 :

Can you explain why?

Of course only to have full RBD support!
Mister Torvalds said 5 is not really a major release as there are any real breaking changes.
He jokes about he just finished fingers in his hands and foots to give name to the kernel.
So 5.3 is just 4 release upfront of the 4.19 and any big change.

Probably 5.3 has a better hardware support than 4.19 and not so much more.
https://itsfoss.com/linux-kernel-5/

This is WEEEEEEEEEEEL know issue.
CentOS marked this bug as WON'T FIX!
So keep the previous kernel and that's it.

https://bugs.centos.org/view.php?id=15074

Do you think is it implementable in the next release?

@maxcuttins said in Great projects have great documentation. Is XCP-ng a great project?:

Is there out a know issue paper about XCP8?
I just come back from holidays and it sound it's time to upgrade...

Windows 7 is already so old that for a minute I just get confused about it was the XP.
Well not... XP is a piece of history at moment so it's ok.

However I have to said that WinXP was a very good OS instead of Vista & Win8 and still it's a pity that is not supported anymore
At moment only Win7 can be claimed as real successor.

Is there out a know issue paper about XCP8?
I just come back from holidays and it sound it's time to upgrade...

Kudos to you!

Another error while I was live migrating a VM from an host to another to reboot the host that need rebooting after the upgrade.

Migrating VM 'XXXXXX'
Internal Error:
Xenops_interface.Internal_error("Domain.Emu_manager_failure("Received error from emu-manager:xenguestInvalid Argument")")

I'm trying to find the log

@stormi just updated.
After the upgrade the reboot of the master failed with this screen:

Oh yes! Of course yes!

@cg said in Citrix Hypervisor 8.0 landed:

@maxcuttins did you really measure 10 and 100 MB after I said 1 G is not enough for accurate results?

Usually you set blocksize to something usefull, like 1M and set count to e.g. 10000.
Of course you can change blocksize to test a bit, but that's usually between like 64k and maybe 4M.

Ah did you intend 10G? instead of 10M?

@cg said in Citrix Hypervisor 8.0 landed:

@maxcuttins said in Citrix Hypervisor 8.0 landed:

I throw down one of my xcp-host to setup a not-nested-virtualized xen-8 in order to test RBD speed. Performance are about 4x slower than they should be but at least it run almost like a standard local disk.

dd if=/dev/zero of=./test.img bs=1G count=1 oflag=dsync
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 1.86156 s, 577 MB/s

1G is usually a really bad test, as pretty small things can influence the result massively.
You should run tests with 10 or better 100 - if you can.
That also diminishes influence of any caches (on source and target!).

Not very good.
Here is 10M:

dd if=/dev/zero of=./test1.img bs=10M count=1 oflag=dsync
1+0 records in
1+0 records out
10485760 bytes (10 MB) copied, 0.0545468 s, 192 MB/s

and here 100M:

dd if=/dev/zero of=./test1.img bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 0.266544 s, 393 MB/s

@stormi

• verify creation a new Windows VM (install guest tools)
• verify basic VM functionality (start, reboot, suspend, shutdown)

Is arleady there!

@stormi said in Updates announcements and testing:

@maxcuttins I plan to do that someday, but it will be faster if the community does it for me

Here you are:
https://github.com/xcp-ng/xcp/wiki/Test-XCP

Take a look.
I just write it down with my perfect italenglish

@stormi said in Updates announcements and testing:

@maxcuttins I plan to do that someday, but it will be faster if the community does it for me

I'll write down a few test list in order to start the story on the wiki.

@stormi said in Updates announcements and testing:

What to test:

• basic functions of the hypervisor, VMs...

I would like to join tester cluster permanently.
I think could be helpfull put on the wiki the complete set of test we should do before consider the test passed. I can ran some of the most used function but I probably use only 20% of the feature of Xen. So having a table of test to run could be helpfull to understand what is mandatory to do to consider "stable" the new version.