Scale Computing Platform vs. XenServer

I would recommend it to anyone who has three or more servers. We just received another quote as I am about to deploy Scale at City Hall as well. This will replace my 8-year-old VMware cluster that hosts 20 servers.

Incentivized

It can be really helpful & useful if we are using Citrix Hypervisor with other provisioning tools. Here are some specific scenarios where Citrix Hypervisor (formerly Citrix XenServer) is well-suited: Server Consolidation, Virtual Desktops, Disaster Recovery, Development & Testing Environments. On the other hand, there are some scenarios where Citrix Hypervisor may be less appropriate: Small-scale Deployments, Highly Heterogeneous Environments, and Limited Virtualization Requirements.

Incentivized

• Snapshots are lean and fast, so restore time is simply amazing. When you don't have time to wait after a crypto attack to restore, I have found nothing faster!
• Clients can never fully know their growth for years to come, and sometimes it is only a year after the original install. This is no problem we can build on to the system like Lego blocks. Just simply adding a node or two and there is no downtime!
• There are many functions that can be done while servers are running that help to maintain the most uptime, as an example disk size on the primary disk can be expanded without shutting down the server.

Incentivized

• Citrix hypervisor does price very well for small organizations. It is free.
• Since this product is open source it does not have any type of vendor lockdown issues.
• Allows live migration of VM's so you can keep systems up and running when changes are needed to the hardware in the background.
• The GUI management tools are quite easy to learn.
• Has Snapshot capability which is a great way to protect against malware as well as do risk-free upgrades.

Incentivized

• It exposes no backup API. You have to treat VMs as physical machines, with all the drawbacks. This is a huge problem, since the official partner Acronis can't deliver. If you ever worked with Veeam you want it back very very badly.
• Assigned RAM is used RAM. The hypervisor can't share memory or only allocate what is used etc. It's wasted RAM most of the time.
• No logging and auditing. (There is, but not visible to the customer).
• The GUI is quite bad. It looks like done by a designer instead of an IT expert. But it's improving constantly.
• The company relies heavily on KVM, but seems to have no developer in the open source community. This leads to answers like "we can't do anything about QEMU drivers". Yes, you can. Have delevopers working on it.
• You can't do basic things like list all of your VMs and see how much RAM/disk, etc. they are using (e.g. in a list view).
• No rules on which VMs start on which nodes, which VMs to prioritize, etc.

Incentivized

• Adding or presenting additional storage to the host can often be a task that is far more involved than competitive products.
• The product can require reboots more frequently than competitors due to the DOM kernel getting "hung up".
• Sometimes when a virtual machine is deleted it still leaves behind orphaned vdisks.
• Recovering from the loss of a host can sometimes cause virtual machines to require lengthy command prompt scripting to fix so they can be powered back on from another host.

Incentivized

Since I have had no issues with downtime; easier management of my cluster and the ability to lower the number of devices in my Infrastructure, I will gladly renew my support contract with Scale Computing HC3 and upgrade my equipment with them when it comes time for it.

Incentivized

With the knowledge and usage of solutions from VMware and Microsoft offering more compelling cloud integrated options it makes it more compelling in many environments which I consult. XenServer is a good product and fits the bill in many smaller environments but as clients look to the cloud or a hybrid cloud it can in some cases make it a bit more difficult.

Incentivized

Everything you need to do is point-and-click easy. If you are the kind of admin who wants to edit every config file and endlessly customize your environment, then Scale may not be for you. On the other hand, if you just want it to work really well, and do what they told you it will do, then Scale is the ideal system.

Incentivized

XenServer is quite usable due to the simplicity the management and installation provide for an administrator. The console for management is very intuitive and can easily be installed on any Windows operating system. There is a relatively simple web console that can be implemented as well that enhances the usability to provide service to non-administrators.

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Never had an outage or an error. Once a hard drive failed, but Scale kept on working flawlessly without interruption.

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It's been a little problematic in the past at larger VDI deployments requiring a bit more care and feeding than other vendors. But the latest releases (6.5.x) have brought about huge improvements in the stability and availability.

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Performance has been just as outstanding as reliability. I have never experienced delays in any aspect of usage.

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When running like a top XenServer is a fantastic hypervisor. There is relatively low overhead on the Dom0 so workloads get the most of the resources.

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The support team deserves major props for how cordial and professional they were with our implementation. We were assigned a project manager and engineer. Everything was scheduled with our kick-off call, and our engineer got us up and running in no time.

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The staff I've worked with are very knowledgeable or able to get a very well articulated and capable support team member on the phone or helping them if necessary and they always want to ensure the best experience possible for you on the platform. The ability for the support team to reach out to hardware vendors for assistance is a nice plus too.

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I did not do in-person training.

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Part of a training for certification to become a trainer for Citrix included an in-person training with a Master CCI. The XenServer training at this time was pretty simplified due to the product primarily being installed however you did have to work with it and mildly configure the system.

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Because Scale is so simple, the training is just as quick and easy.

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Haven't given it a real go with any online training however there are some options out there. I have taught a course following Citrix material for XenDesktop which leverages XenServer and it is pre-built so not the best for XenServer specifically for installation but configuration is mildly touched on

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The implementation was very easy. We had Scale support on standby and they were ready and eager to help if needed. The process went so fast the employees in the organization did not even know it was done.

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Ensure you review the HCL (hardware compatibility list) and reach out to the hardware vendors to ensure they support the platform and in case they have documentation that can be followed for the implementation. Also ensure the prerequisites are completed prior to implementation so that as few unexpected delays occur as you can control.

Incentivized

At the end of the day, and in the environment we are in, Scale just fits the bill, both price-wise and functionality-wise. Upgrading our VM environment was always a week-long process, now, it is a twenty-minute process, implementing, converting VMs, and rolling everything over to Scale was completed in less than a week's time, and that included training.

Incentivized

Feature for feature they are neck and neck. I have used Hyper-V 2012 and 2016, VMware ESXi and XenServer evenly. XenServer is a fast install, good documentation, with enterprise features out the box that compare or exceed what VMWare offered with a higher cost of entry.

Incentivized

HC3 is one of the best products I have purchased for our district. It is unbelievably reliable to the point that they shoot themselves in the foot on support contracts.

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The servers latest versions have made massive improvements to scalability. But from past experience there have been issues when running workloads for extended periods of time without reboot on the hosts. I would need to run similar workloads on the 6.5 release which has changed much of the bottlenecks or issues so I'd imagine its far more capable now, Perhaps able to stand near the best in the market.

Incentivized

• 0% downtime or loss of revenue due to downtime.
• The simplicity of testing backups in a live environment in the event of a technical catastrophe.
• Ease of mind and a lot less stress worrying about a raid system within a standalone server dying in the middle of the night.

Incentivized

• Xenserver is easy to learn. We paid for support only for installation and deployment in the first three years, and now our team has the knowledge to solve most problems.
• Low CAPEX if you have a team that uses open source software day by day.
• But paid support is necessary to solve critical problems. The open source community is not enough. Actually, we have difficulty solving some bugs without paying for support.
• Medium OPEX if you have a team that uses open source software day by day.

Incentivized