Wouldnât
a SAS HBA be similar to an FC or hardware iSCSI HBA? How
does XCP deal with a hardware iSCSI or FC HBAs and LUNs?Â
XCP just uses CLVM, which in theory should be able to share
any centralized block device, right? Or am I totally off
base hereâ
Â
Â
AFAIK XCP does not supports shared SCSI SR.
You can try adopt SR, but this is not simple task and require
deep understanding of some XCP internals.
XCP can allow you to create few SR's for few hosts, but VMs on
that host will be unmigrable (half of cloud gone). If you want
to use XCP in full scale you need network attachable storage,
NFS or ISCSI. (note: xcp-xapi in debian supports only NFS).
On 29.09.2012 01:11, Alexander Ivanov wrote:
Hello,
I have rather general question about XCP
- Cloud approach, not sure if it's appropriate here but
would reallyÂappreciateÂany info.
I'm very new to XCP and the whole Cloud
approach, though I've been using Xen 3.4 on CentOS 5 and KVM
on CentOS 6 for quite a while. Our company has couple of
racks with mostly Dell servers using local drives as VM
images, plus few of the servers directly attached to Dell
MD3200 (this is basically external RAID storage that can be
shared by few servers with HBA cards - up to 8 portsÂper
MD3200Âconnected to servers by SAS cables - cheap
alternatives to 10G iSCSIÂinfrastructure).
So, now I'm thinking about moving to
Cloud infrastructure and my question is if there is any way
to make this MD3200 (or MD1220 or whatever
otherÂexternalÂstorage it can be using SAS - HBA instead of
real iSCSI) available as a SR (storage resource) for my
cloud? From what I see so far (I have installed XCP 1.4.90
with CloudStack 3.0.2) looks like the only way to make some
resource available to several servers in the cloud is to use
iSCSI (or NFS - basically network sharing). But I really
hate to spend few grands on 10G NICs and 10G switch (they're
still not cheap). If I just stick to Xen (or KVM) without
the 'cloud' I can 'share' this external storage connected by
SAS cables among 8 serversÂ(which is all my 'cloud')Âfine.
Perhaps I just missing something?
I would also appreciate any info from the
actual users of XCP/KVM - what would you recommend as a
'cloud orchestration' software? Looks like CloudStack is
best choice now (compared to OpenStack and OpenNebula)? I
just want to make sure the solution I choose will be
relevant in few years from now.Â
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