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From Andrija Panic <andrija.pa...@gmail.com>
Subject Re: XenServer
Date Fri, 31 Oct 2014 16:50:26 GMT
Andrei - I agree 100% with you - fancy stuff, new features, and basic ones
needs to be fixed - snapshoting, custom vxlan MTU and so on, GUI
brokne/buggy, and so on.

We have customer who wants to do 90 days snapshoting and possibility to
revert back - with this approach coping from primary to secondary volume,
simple 50GB volume X 90 days = 4.5 TB of data on secondary storage - for
me, this is nonsese... snapshots needs to stay on primary storage (must be
shared storage I undestand etc..)

Anyway, we agree, let see if the issues get fixed by chance :)
Cheers

On 31 October 2014 17:33, Andrei Mikhailovsky <andrei@arhont.com> wrote:

> Andrija,
>
> Also, I might add that the snapshotting should not take a long time, like
> what's currently happening with KVM. It takes absolutely ages for the
> snapshot to complete while the image is being copied from primary to
> secondary storage. If you have a bunch of volumes you want to snapshot,
> they just take up all the queue and eventually timeout. Try taking a
> snapshot of about 50+ volumes at the same time, which is not very uncommon
> for a medium infrastructure, let alone a large cloud. Things will get
> broken pretty quickly.
>
> Even if you are using ceph storage with the built in capabilities for
> doing rbd snapshotting, this mechanism is still somewhat broken and buggy.
> For instance, it would be nice to have a working ability to keep the
> snapshots on the primary storage to remove this time consuming
> primary-secondary storage coping, but this feature has been broken for
> about a year already with no prospects of being fixed as far as I can tell.
>
> So, as it stands at the moment, looking from the customer perspective, the
> snapshotting is broken with KVM and needs to be addressed asap. Not really
> sure why this is not a priority for the dev team? It seems that the team is
> pushing those fancy features into the new releases without concentrating on
> the basics of what the clients want. Very frustrating for the clients (((
>
> Andrei
> ----- Original Message -----
>
> > From: "Andrija Panic" <andrija.panic@gmail.com>
> > To: users@cloudstack.apache.org
> > Sent: Friday, 31 October, 2014 3:35:20 PM
> > Subject: Re: XenServer
>
> > Nux, I agree that we need to push that - but since I'm not a
> > develoepr, no
> > reall use of me :) If I need to push somewhere, just let me know.
> > Anyway, user want a single click SNAPSHOT - and an option for revert
> > -
> > talking about public cloud....
>
> > Cheers
>
> > On 31 October 2014 16:18, Nux! <nux@li.nux.ro> wrote:
>
> > > Andrija,
> > >
> > > AFAIK you can't snapshot all the volumes in the exact same moment,
> > > but I
> > > am not sure if it really needed in your case.
> > > VM snapshot it's what you would need, only supported for Xenserver
> > > and
> > > VMware; we need to push for VM snapshot for KVM as well, I know
> > > it's
> > > possible as I have done it manually with "virsh".
> > >
> > > There are different ways around a problem though, if you are
> > > running mysql
> > > with innodb for example you could just do a mysqldump (with
> > > --single-transaction to avoid locking the tables).
> > >
> > > HTH
> > > Lucian
> > >
> > > --
> > > Sent from the Delta quadrant using Borg technology!
> > >
> > > Nux!
> > > www.nux.ro
> > >
> > > ----- Original Message -----
> > > > From: "Andrija Panic" <andrija.panic@gmail.com>
> > > > To: users@cloudstack.apache.org
> > > > Sent: Friday, 31 October, 2014 15:10:26
> > > > Subject: Re: XenServer
> > >
> > > > Nux,
> > > >
> > > > I understand this - but a question for you - you have i.e. 3
> > > > volumes
> > > > attached to a VM - how do you snapshot those and make sure they
> > > > are
> > > > snapshoted in the EXACT same moment, to preserve data integrity
> > > > of the
> > > data
> > > > inside VM - you have i.e. database files on 1 volume, database
> > > > logs on
> > > > another.
> > > >
> > > > This is a reall question, not kidding ? What I know, you can
> > > > turnoff VM,
> > > > and then snapshot one by one - but this is not the goal of the
> > > > snapshotting...
> > > > ?
> > > >
> > > > Thanks
> > > >
> > > >
> > > >
> > > > On 31 October 2014 16:06, Nux! <nux@li.nux.ro> wrote:
> > > >
> > > >> Andrija,
> > > >>
> > > >> You can still do volume snapshotting with KVM, works fine.
> > > >>
> > > >>
> > >
> http://www.nux.ro/archive/2014/01/Taking_KVM_volume_snapshots_with_Cloudstack_4_2_on_CentOS_6_5.html
> > > >>
> > > >> All we need is a way to quickly restore the volume, some guys at
> > > leaseweb
> > > >> were working on something like this, hope to see this feature in
> > > >> future
> > > >> versions.
> > > >>
> > > >> --
> > > >> Sent from the Delta quadrant using Borg technology!
> > > >>
> > > >> Nux!
> > > >> www.nux.ro
> > > >>
> > > >> ----- Original Message -----
> > > >> > From: "Andrija Panic" <andrija.panic@gmail.com>
> > > >> > To: users@cloudstack.apache.org
> > > >> > Sent: Friday, 31 October, 2014 09:37:49
> > > >> > Subject: Re: XenServer
> > > >>
> > > >> > My vote also for KVM snapshooting - having all the nice
> > > >> > fetaures, but
> > > >> > without basic virtualization stuff like snapshotting - it
> > > >> > simply
> > > drives
> > > >> me
> > > >> > and our client nuts...
> > > >> >
> > > >> > On 31 October 2014 10:03, Andrei Mikhailovsky
> > > >> > <andrei@arhont.com>
> > > wrote:
> > > >> >
> > > >> >> Is there a feature request for this support or should we
open
> > > >> >> one? I
> > > >> would
> > > >> >> like to see this implemented for KVM.
> > > >> >>
> > > >> >> Andrei
> > > >> >> ----- Original Message -----
> > > >> >>
> > > >> >> > From: "Nux!" <nux@li.nux.ro>
> > > >> >> > To: users@cloudstack.apache.org
> > > >> >> > Sent: Thursday, 30 October, 2014 11:25:10 PM
> > > >> >> > Subject: Re: XenServer
> > > >> >>
> > > >> >> > Andrei, I am hopeful the next incarnation of XenServer
will
> > > >> >> > be much
> > > >> >> > better/modern, with support for CEPH, GlusterFS etc.
> > > >> >>
> > > >> >> > Re KVM snapshotting, KVM can do live snapshots of the
> > > volumes+memory
> > > >> >> > (you can do it with "virsh"), but ACS doesn't support
it;
> > > >> >> > forgot
> > > >> >> > why.
> > > >> >>
> > > >> >> > Lucian
> > > >> >>
> > > >> >> > --
> > > >> >> > Sent from the Delta quadrant using Borg technology!
> > > >> >>
> > > >> >> > Nux!
> > > >> >> > www.nux.ro
> > > >> >>
> > > >> >> > ----- Original Message -----
> > > >> >> > > From: "Andrei Mikhailovsky" <andrei@arhont.com>
> > > >> >> > > To: users@cloudstack.apache.org
> > > >> >> > > Sent: Thursday, 30 October, 2014 21:24:06
> > > >> >> > > Subject: Re: XenServer
> > > >> >>
> > > >> >> > > I would happily switch to XenServer once they will
have
> > > >> >> > > ceph
> > > >> >> > > support. I do
> > > >> >> > > prefer XenServer and the feature list of ACS +
XenServer
> > > >> >> > > is a bit
> > > >> >> > > better.
> > > >> >> > >
> > > >> >> > > It sucks not having proper snapshotting in KVM
where one
> > > >> >> > > can
> > > create
> > > >> >> > > the whole vm
> > > >> >> > > snapshot (volumes + memory) very quickly without
the need
> > > >> >> > > to
> > > bother
> > > >> >> > > snapshotting every volume and wait for ages.
> > > >> >> > >
> > > >> >> > > Andrei
> > > >> >> > > ----- Original Message -----
> > > >> >> > >
> > > >> >> > >> From: "motty cruz" <motty.cruz@gmail.com>
> > > >> >> > >> To: users@cloudstack.apache.org
> > > >> >> > >> Sent: Thursday, 30 October, 2014 8:43:32 PM
> > > >> >> > >> Subject: Re: XenServer
> > > >> >> > >
> > > >> >> > >> I am no expert by any means but my personal
opinion, I
> > > >> >> > >> really
> > > like
> > > >> >> > >> XenServer a lot better. I have a cluster of
about 5
> > > >> >> > >> machines
> > > >> >> > >> running
> > > >> >> > >> KVM,
> > > >> >> > >> ACS 4.3. I unable to do snapshot, migrating
VMs from one
> > > >> >> > >> host to
> > > >> >> > >> another
> > > >> >> > >> takes a long time. I had a very bad experience
with
> > > >> >> > >> "Balloon
> > > >> >> > >> driver",
> > > >> >> > >> I am
> > > >> >> > >> traumatize using KVM.
> > > >> >> > >
> > > >> >> > >> XenServer don't need to install cloudstack
agent is
> > > >> >> > >> already
> > > >> >> > >> integrated. I
> > > >> >> > >> am very happy with XenServer. I still need
to work out a
> > > >> >> > >> few
> > > >> >> > >> lingering
> > > >> >> > >> issues but thus far am a happy person.
> > > >> >> > >
> > > >> >> > >> Thanks,
> > > >> >> > >> -Motty
> > > >> >> > >
> > > >> >> > >> On Thu, Oct 30, 2014 at 1:15 PM, Andrei Mikhailovsky
> > > >> >> > >> <andrei@arhont.com>
> > > >> >> > >> wrote:
> > > >> >> > >
> > > >> >> > >> > I wold love to see the ability to do proper
> > > >> >> > >> > snapshotting on
> > > KVM.
> > > >> >> > >> > XenServer
> > > >> >> > >> > does it so much better!
> > > >> >> > >> >
> > > >> >> > >> > ----- Original Message -----
> > > >> >> > >> >
> > > >> >> > >> > > From: "Vladimir Melnik" <v.melnik@uplink.ua>
> > > >> >> > >> > > To: users@cloudstack.apache.org
> > > >> >> > >> > > Sent: Thursday, 30 October, 2014
8:09:17 PM
> > > >> >> > >> > > Subject: RE: XenServer
> > > >> >> > >> >
> > > >> >> > >> > > Oh, thank you so much, folks, for
your replies on
> > > >> >> > >> > > this
> > > topic!
> > > >> >> > >> > > Now
> > > >> >> > >> > > I
> > > >> >> > >> > > understand that I shouldn't migrate
to XenServer, as
> > > >> >> > >> > > I
> > > already
> > > >> >> > >> > > have
> > > >> >> > >> > > a bunch of hosts running KVM and
it really won't be
> > > >> >> > >> > > a good
> > > >> >> > >> > > idea
> > > >> >> > >> > > to
> > > >> >> > >> > > bread such a zoo.
> > > >> >> > >> >
> > > >> >> > >> > > The only thing that makes me feel
envy is an ability
> > > >> >> > >> > > to
> > > change
> > > >> >> > >> > > configuration of a virtual machine
without
> > > >> >> > >> > > restarting it.
> > > As I
> > > >> >> > >> > > know,
> > > >> >> > >> > > KVM doesn't support it yet, am I
right? Other
> > > >> >> > >> > > XenServer
> > > >> >> > >> > > features
> > > >> >> > >> > > don't seem to be so exciting to me
:)
> > > >> >> > >> >
> > > >> >> > >> > > One more time - thanks to all who
have helped me to
> > > >> >> > >> > > decide
> > > not
> > > >> >> > >> > > to
> > > >> >> > >> > > do
> > > >> >> > >> > > something that I would regret.
> > > >> >> > >> >
> > > >> >> > >> > > Best regards,
> > > >> >> > >> > > V.
> > > >> >> > >> >
> > > >> >> > >
> > > >> >> > >> --
> > > >> >> > >> Thanks for your support,
> > > >> >> > > > Motty
> > > >> >>
> > > >> >
> > > >> >
> > > >> >
> > > >> > --
> > > >> >
> > > >> > Andrija Panić
> > > >> > --------------------------------------
> > > >> > http://admintweets.com
> > > >> > --------------------------------------
> > > >>
> > > >
> > > >
> > > >
> > > > --
> > > >
> > > > Andrija Panić
> > > > --------------------------------------
> > > > http://admintweets.com
> > > > --------------------------------------
> > >
>
> > --
>
> > Andrija Panić
> > --------------------------------------
> > http://admintweets.com
> > --------------------------------------
>



-- 

Andrija Panić
--------------------------------------
  http://admintweets.com
--------------------------------------

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