Before Xen became part of the foundation, Kurth says, many people in the Linux community favored KVM. “The thinking really went along the lines of: KVM=Linux=Good. Xen=Citrix=Bad.” With the open source community connecting Xen with Citrix, the project’s features and open source nature were overlooked. Kurth says that Xen’s new role as a Linux Foundation Collaborative Project has changed how the community and press view it.
It’s an exciting day for Citrix, our customers and the open source community as we announce some BIG news for Citrix XenServer. Today we cross another major milestone as XenServer moves to a full open source model beginning with the new XenServer 6.2. Cutting right to the chase, here are the highlights that I’ll go into more detail on:
- XenServer 6.2 is available as a free open source virtualization platform for all users
- Citrix is also introducing a new XenServer.org community portal
- Citrix provides a paid version of XenServer that includes support and maintenance
- New CPU socket licensing
- New simplified packaging and pricing
Citrix is giving its cloud deployment platform an Apache license, marking a migration away from the evolving OpenStack project and an embrace of Amazon Web Services offerings.
Now, what about throughput? The host’s networking resources are shared amongst the virtual desktops it supports and users will suffer from poor performance if there’s insufficient bandwidth available. As such, consider routing virtual machine traffic over an SLB bond so that it’s automatically load balanced across two NICs. Virtual machine traffic is load balanced by MAC address and rebalanced every ten seconds. Failover support is provided for all other traffic types, including management and IP-based storage traffic. The load balancing algorithm associates traffic from each virtual interface to one of two NICs in the bond. It’s important to understand that it doesn’t allow a single virtual interface to utilize both NICs in the bond simultaneously.
I can see this getting complicated fast. XenDesktop seems to use a lot of network bandwidth. Someone must have done a study on this. Thin clients have been a marque product for the last couple of decades. Wouldn’t it be nice if our clients didn’t have a hard drive — as if merely eliminating a hard drive would eliminate all IT support for that device.
Todo: Get XenDesktop running and do some tests and estimations.
“Site Recovery in previous versions was dependent on the StorageLink Gateway component which was a Windows-based separate installation,” Citrix says. “With XenServer 6.0 the StorageLink functionality is delivered as a native part of XenCenter and the Site Recovery functionality is done natively as well.”
This also allows Citrix to support replication on a greater number of storage devices.Similarly, a Windows VM requirement was removed for access to storage features like data replication, de-duplication, snapshots and cloning, while a new workload balancing tool uses a Linux-based virtual appliance “with a smaller footprint [that] replaces the Windows-based virtual appliance and eliminates the Windows licensing dependency,” Citrix said.
Here’s an interesting comment on this article:
OVF is a format that describes virtual appliances; these could be single or multiple machine. In doing so, OVF describes the virtual hardware and physical requirements of each machine.
In my example I am going to use XenConvert to create an OVF Appliance from a XenServer XVA (that is an export of a XenServer VM), modify that using a VMware created OVF, and then import to ESX.
Heavyweight companies from around the globe are competing in the hot cloud space. In the center ring are two tough competitors Citrix and VMware. Each has strengths and weaknesses. Which should you choose?
In this article, I compare the hypervisor products from these two vendors, Citrix XenServer and VMware ESXi, and explore what each as to offer developers. Since hypervisors have become are a dime a dozen, it only makes sense that a comparison of VMware ESXi and Citrix XenServer also discusses the surrounding components to get a full picture of what each can do for the development
This article describes how to mount a Linux Logical Volume Manager (LVM) partition located inside a virtual disk (VDI) in a XenServer Host.
I have never been a fan of logical volume management which seems to be a Red Hat thing. It completely complicates matters when mounting drives. XenServer, which is based off centos (I think) is littered with LVMs as the result of performing the above procedure will attest. I hope Citrix had a good reason for doing this.
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