On 29/03/2012 11:04, Kir Kolyshkin wrote:
On 03/28/2012 11:49 AM, David Brown wrote:
I /really/ wish the openvz developers would move beyond kernel
2.6.32 - kernal 2.6.33 introduced snapshot merging to LVM which
would play wonderfully with this setup.
I'm not sure why people think that RHEL6 kernel is pure 2.6.32. It is
definitely not!
For snapshot merging, I am not an expert here but googling for 'rhel6
lvm snapshot merging' gave me this:
http://www.linuxtopia.org/online_books/rhel6/rhel_6_lvm_admin/rhel_6_lvm_snapshot_merge.html
and this:
https://access.redhat.com/knowledge/solutions/58510
Both articles suggest RHEL6 kernel supports LVM snapshot merging, and
so should OpenVZ RHEL6-based kernel.
PS If you are using non-rhel6 openvz kernel, it's definitely time to
switch, and lots of reasons to do that besides LVM snapshot merging.
Notable things are vswap, ploop, stability...
Kir.
I am using a non-rhel6 openvz kernel because I don't use RHEL - I use
Debian on my servers. Are you suggesting that I should specifically use
the RHEL6 openvz kernel even though I use Debian? That's something I
haven't thought of trying, but if it is the recommendation of the OpenVZ
developers, then I will give it a shot.
More generally, I would hope that one day OpenVZ will change over to
following the current kernel (or perhaps the current long-term support
kernels) - there has been a lot of development since 2.6.32, not all of
which gets backported by Red Hat. I'd expect that a lot of OpenVZ code
can be merged with or replaced by the container support in later
kernels. I also think that if OpenVZ doesn't catch up, then people will
migrate to other solutions such as Linux VServer or LXC (I know I
considered it for the last server I configured).
Of course, I fully appreciate that something like that takes a lot of
effort, and that means time, money, people to do the work, testing,
etc., etc. But one can still hope!
David
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