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A data center is a centralized computer system that enables organizations to manage and share information with other organizations. Because these storage units hold the most critical or proprietary assets, an organization must remain stable. Therefore data centers must always be secure and reliable. Traditionally Data Center frontier systems used to be tightly controlled infrastructure but now public clouds are changing the model.

What is virtualization

Virtualization is a process used to manage and organize multiple operations. Using the same physical hardware, one could run multiple different installations of Operating Systems. For instance, you might have an OS for your workstation, one for home and another for servers. Each installation would be completely isolated from the others except that each could share the same single piece of hardware (the CPU, memory, etc

Do you need a data center

Data centers are the heart of an organization. They store all your most important information and keep it safe, secure, and always available to everyone who needs it. But traditional data centers come with their own set of problems. They’re expensive to build, difficult to maintain, and require constant attention from highly trained IT professionals. With public clouds changing the game on how we think about infrastructure management, Geolance is here to help you take advantage of this new model for building out your critical systems. We offer enterprise-grade security without any of the hassle or cost associated with traditional models!

What is cloud computing

Cloud computing is a way we can use our existing IT infrastructure more efficiently by purchasing only what we need to use instead of having to purchase all our hardware. Instead, we rent these tools like applications and data storage on-demand over the internet (cloud). We pay as we go and this helps us save because we do not have to worry about hardware or network support.

What is Infrastructure as a Service

Infrastructure as a service (IaaS) is the basic building block of cloud computing and allows us to rent resources like storage and computational resources for use in our data centers. This means we can drop and add resources without having to purchase new hardware. We also don't have to maintain these resources because they are maintained by the cloud providers.

What is Platform as a Service

Platform as a service (PaaS) provides complete application development environments that developers can design, build and deploy applications without worrying about the scaling headaches of managing the infrastructure below it. This makes PaaS good for multi-tenant software development that allows problem solvers to quickly develop custom-developed software for customers.

What is Software as a Service

Software as a service (SaaS) provides applications like email, calendars, and productivity software like Dropbox directly to end-users over the internet. This makes it easy for employees to share information because all they need is an internet connection. SaaS reduces the cost of providing these services by eliminating many traditional IT costs.

Historie

Cloud computing has been around for a while and came about in the early days of enterprise computing. It was originally used by huge companies like Amazon, Google, and IBM to build and maintain their web infrastructures. These companies realized that they could outsource these tasks and reduce costs because it is difficult to hire qualified employees who have experience in this field. That's why there are various levels of cloud services available from Multitenant Multifunctional SaaS up to Multivendor Dedicated Data Center IaaS.

What is multitenant

Multitenant means one can serve multiple organizations or clients on the same infrastructure simultaneously without them knowing each other exists., security mechanisms must be put in place to prevent this information from leaking.

What is multifunctional

Multifunctional means that one can use the same physical infrastructure for different functions such as data storage, hosting, and network. This simplifies management and reduces costs because it uses the same hardware but just adds or removes software needed for each task. The downside of multitenancy comes into play here because there are security issues involved that need to be addressed. This is why these services have dedicated management teams who dedicate their careers to addressing these challenges day in and day out.

What is IaaS

Infrastructure as a service (IaaS) is the basic building block of cloud computing and allows us to rent resources like storage and computational resources for use in our data center design solutions. This means we can drop and add resources without having to purchase new hardware. We also don't have to maintain these resources because they are maintained by the cloud providers.

What is PaaS

Platform as a service (PaaS) provides complete application development environments that developers can design, build and deploy applications without worrying about the scaling headaches of managing the infrastructure below it. This makes PaaS good for multi-tenant software development that allows problem solvers to quickly develop custom-developed software for multiple customers.

What is a hypervisor

A hypervisor allows us to run multiple virtual servers on the same hardware simultaneously without it knowing about each other. On a modern operating system, we can create a virtual machine (VM) that acts as a physical machine but runs on top of the host OS using what's called a Hypervisor or Virtual Machine Monitor (VMM). The VMM enables the guest VMs to share underlying hardware resources with another guest VMs while isolating their execution from those of other guests. For example, one VM may crash but the others won't be affected by this crash. One downside of this architecture is that there might be a resource contention problem between one guest VM and another where they both try to access the same resource simultaneously causing a conflict. This is why most hypervisors have a Lock Manager that can be used to solve this problem by simply locking the requested resource so no other process/VM can have it until it's released after the first requestor has finished using it.

Colocation facilities

These are facilities that provide hardware resources like computing and storage as a service. A colocation facility can rent cages, cabinets, or racks to companies who want their servers for redundancy and backup purposes.

How is a dedicated data center different from colocation

Typically colocation facilities lease them to clients at wholesale rates and then the client has to provide internet access and power densities to it. With Dedicated Data Centers (DDC), they manage these infrastructures on behalf of the customer saving them money because they don't have to hire qualified people with experience in managing infrastructure. This also reduces costs because there isn't any downtime related to hardware failures. After all, all hardware failures are handled by the dedicated data center company so their clients lose profits during this time.

What are the steps involved in server virtualization

The first step is called "full Virtualization" where a hypervisor runs on top of a full-stack OS. The second step is "Para-Virtualization" which requires an operating system to be modified before it can run with the help of a hypervisor such as Xen and VMWare's ESX platform. This allows companies like Amazon to provide services because they already have this hardware to do so.

How does one use Para-Virtualization

One can't bootstrap para-virtualized (PV) guests without having access to PV-aware versions of Linux, FreeBSD, or Windows. It requires special scripts and boot loaders that allow us to select from several kernels on the system.

Cloud computing services

There are two types of cloud computing services: Infrastructure as a Service (IaaS) which is where we share complete physical servers of the user's choice with environmental control over operating systems and storage options. The second type is Platform as a Service (PaaS) which provides fully hosted and managed application stacks that can be deployed without worrying about individual server maintenance and setup details.

Managed hosting

Managed Hosting is when a provider manages all aspects of hosting including hardware, software, and network infrastructure. The provider in this case becomes the System Administrator for their client's infrastructure that may include web servers, application servers, etc. These managed hosting providers usually have daily backups which can be restored to quickly restore lost data in the event of a crime or disaster.

What is Platform as a Service (PaaS)

It's where companies can rent pre-configured computing resources from service providers so they don't have to worry about low-level details such as managing operating systems and their updates. This allows them to focus on innovating new features for their products rather than maintaining them.

Amazon Web Services

AWS is Amazon's Cloud Computing service that provides web services such as storage, computing power, and databases to software developers. Amazon is the first company that has successfully made it work offering these resources on a pay-as-you-go basis compared to other cloud providers who charge upfront for hosting. Amazon also provides an API so it can be used in conjunction with many programming languages including Python, Java, .NET, etc.

What are the benefits of using cloud computing services

Cloud computing services offer better flexibility because virtualized servers can be created/destroyed whenever it's needed without much overhead. Just think about how you normally go about setting up your server at home or in the office doing all the hard work for it even though you only use a fraction of it.

What are the disadvantages of cloud computing services

The disadvantage is that you're going to be sharing resources with other users in a data center which could lead to higher costs and lower performance compared to dedicated hardware. In most cases, companies use these services for testing new applications or when they have a short spike in traffic without having to buy extra hardware from the beginning.

Why do you think Google is using OpenStack instead of AWS

Google's infrastructure team would rather work with an open-source project to build their platform so they don't have any vendor lock-in. Amazon has made a lot of progress since 2006 but there are still some limitations compared to what Google can accomplish through OpenStack because it's still a young project with many features still in development.

What is Data Center as a Service (DaaS)

It's where you can lease raw hardware such as racks and servers from providers like Rackspace, Amazon, etc. This allows companies to focus on their core competency instead of worrying about maintaining or building their own data center infrastructure which will save them money in the long run. It also provides better scalability because new hardware can be added when it's needed and removed when it's not.

Why do you think Facebook isn't using OpenStack

Facebook runs most of its services on FreeBSD and wanted OpenStack to be ported to it but this didn't happen due to lack of manpower/resources so it decided to build its version based on Nova. This isn't a bad thing because it helps increase OpenStack development and doesn't make it vendor-dependent.

What is Active-Active replication

It's the ability to have more than one primary server for a service to improve reliability and provide better load balancing without much administrative overhead. This could be useful when you're performing scheduled tasks such as backups or software updates that could potentially cause downtime if done at the wrong time. You can configure your system so that these tasks are split between servers in real-time so only one of them is down at any given moment which makes this configuration much safer than traditional Active-Passive replication where all traffic goes through one "hot" master server.

What is Active-Passive replication

It's the traditional way of running services like databases where you have one primary server (master) that all traffic goes through and at least one secondary server (slave) that receives updates from it with synchronization occurring in real-time. The secondary server is passive because it only responds to requests once the master has sent an acknowledgment that the update was completed. This configuration is considered more stable than Active-Active replication but opens up a single point of failure since your entire system can be brought down by losing connection to your "hot" master server which could be due to hardware/network issues, etc.

Who do you think OpenStack benefits most from

It's a community-based project so everyone can contribute in some way to make it better for everybody. Some of the major contributors are individuals from HP, Red Hat, Rackspace, IBM, Intel, etc. along with many smaller companies and universities across the world who all work together in an open format that makes the project a little different from other similar independent projects in use today.

How do I choose between DaaS and OpenStack

OpenStack is more flexible because you're renting raw hardware while with DaaS you're going to be using their pre-configured images which means if they don't offer what you need then it could be difficult to get your server configured exactly how you want it which makes OpenStack a better choice for somebody who knows what they're doing.

Dedicated hosting

With DaaS, you're going to have a minimum of 2 servers which adds more overhead and possible points of failure that could cause downtime. This makes it easier for companies to scale but you also pay more because it's a bare-metal service instead of a virtualized one so if cost is your biggest concern then OpenStack might be the better choice even though it does require some knowledge.

How do I choose between OpenStack and VMware

It depends on what kind of hardware you already have access to or plan on purchasing. With VMware, there's no need to get new hardware or learn anything about servers since they provide everything necessary in their cloud platform that can be controlled over the web with an an-to-use interface that can be configured in minutes. OpenStack requires that you have some knowledge about servers and the ability to purchase hardware yourself which could potentially cause headaches when trying to get everything set up but if you're already familiar with Linux then it shouldn't be too difficult to understand what's going on unless there are people involved who don't have any experience in server administration so in this case, VMware might be the better choice for a small or beginner business.

What is an API

It stands for "Application Programming Interface" which defines how programs should communicate with each other by specifying what information needs to be sent around to use its features properly. APIs are not only useful when building software but also provide useful documentation explaining how they work when implemented into OpenStack.

Wholesale data center facilities

It's an independent group that takes on the responsibility for continuous operations of all infrastructures within OpenStack clusters. It requires additional hardware to be purchased which will affect cost so it might not be the best choice if money is tight but, if you have some capital to spare, then it can ensure your services run without any interruptions since multiple nodes are being provided simultaneously so if 1 goes down then the others take over automatically.

In-house facilities

It's not about what you can do, it's about what your business needs to grow. If the cost of having 2 data centers is too high then OpenStack could be a better fit because it doesn't require additional hardware which means reduced costs for purchasing and electricity usage so if saving money is important, OpenStack may be best for your company.

Are VMs secure

OpenStack provides security by isolating applications from each other since all processes are confined within containers or virtual machines that are capable of machine learning and are separate from the host operating system so even if an exploit does occur on one VM, it won't affect any others running through OpenStack. The downside to using VMs is that it takes more memory than shared hosting but this could potentially increase performance since the hardware isn't being shared by multiple users which makes OpenStack more efficient since it doesn't need to take up resources for other applications.

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