FWIW,
We've been running a small "cloud" of about 20 servers running xVM Xen.
Initially Nevada hypervisors but now running OpenSolaris 2009.06. Each
hypervisor runs typically between 5-15 guests (mostly OpenSolaris
guests). All the guests virtual disks are hosted on a 7410 Storage
Cluster and using iSCSI.
For some details: http://blogs.sun.com/mock/entry/my_own_private_cloud_aho1
In general its all been pretty stable for us. It all works quite well.
Gives us reasonable performance and stability.
The initial iSCSI support on the Unified Storage had some limitations
though, this is where the biggest head aches were. The latest firmware
is supposed to be much more robust, which we happen to be migrating to
today. My recommendation is if you plan to cluster your 7000 boxes, make
sure you test failover and takeback and force faults (such as head
reboots, network outages, etc) so you understand and have an expectation
on how everything will behave before the condition occurs in a
production environment.
--joe
Mark Johnson wrote:
Frédéric VANNIÈRE wrote:
Hello,
I'm building a "Sun Cloud" based on Sun hardware and software for
hosting.
The storage will be, of course, a Sun Storage 7000 iSCSI (2xGbE
MPxIO), the
hosts servers will be Sun Fire X4170 with either :
- Linux/Debian + XenSource + OpenVSwitch (citrix project)
- or OpenSolaris + xVM + crossbow
I prefer the xVM solution because it's integrated to OpenSolaris,
uses libvirt
and supports out of the box network virtualization.
The guests (domU) will be only paravirtualized Debian with custom
kernel,
and maybe some OpenSolaris x86pv (I will use zones for
Solaris/OpenSolaris
guests).
The features that are mandatory are :
- PV guest support (local kernel, no pygrub)
local kernel (on dom0) won't be great for Solaris..
- Live migration
- Virtualized network (bonding, spanning-tree, vlans, bw limiting,
accounting)
- API for remote management (libvirt is ok)
- stability and performance (200+ managed guests on 5 hosts)
My tests are done now with OpenSolaris 2010.02-snv_124 (Xen 3.3.2),
it works
well but I have not tested the network and performances.
So, is xVM (snv_124) stable enough for production ?
It's a development build. You will have to make your own determination
there... I have been happy with it, but I'm not using it in production
:-)
When will xvm-3.4 come to OpenSolaris ?
3.4 is in testing... When we get through the qual, it will go back...
There are 4 or 5 stopper bugs right now with more testing left to
complete.
We broke this one into multiple putbacks.. We've pushed updates to
the vdisk code and libvirt code already. Only the xen portion is left.
Why is Sun using virtualbox for his cloud ?
Reference? I don't know what it will or will not be using...
VirtualBox works really nice for environments where a graphics head
is important. But you will get a decent hit on I/O performance
and SMP performance.
I wouldn't be surprised to see a mixture of both depending on what
problem your trying to solve... But I don't have any knowledge either
way...
MRJ
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