Parallels et Similitudes Stockage dans un Cloud (nuage)

8:55 AM | Posted by | | Edit Post

Cloud storage similarities (Pstorage) is highly available distributed storage (virtual SAN) with built-in replication and disaster recovery.
Pstorage virtualization platform allows the storage on top devices in material with hard drives locally and was able to unite in the storage cluster in scenarios such as virtualization using virtual machines (vessels) and / or monitoring container system (CTS). Pstorage provides rapid live migration of VMS monitoring devices and CTS through the nodes without having to copy the VM / CT data, the high-availability storage as it becomes available remotely.

Advantages

Are listed in the main Pstorage features below:
There are no special hardware requirements. Basic equipment (SATA / SAS, 1GB Ethernet drives +) can be used to create storage.

Indications of strong consistency. This makes it suitable for Pstorage via the iSCSI protocol, VM and TC operates on top of that (unlike the storage objects such as Amazon S3 or SWIFT).
  • Built-in replication.
  • Automatic recovery from disasters on the hard drive or node failure.
  • High availability. Data remains accessible even for the failure of the hard drive or the contract.
  • Optional caching SSD. SSD caches enhance the overall performance of the group to write and read operations.
  • Checksumming data and washing. Test and washing greatly improve the reliability of the data.
  • Development upon request. You can add more storage nodes to the cluster to increase its disk space. Image VM / CT size is not limited by the size of one of the hard drives.
  • Petabytes tables
  • More uniform performance materials and capacity utilization on the contract, and the contract has been taken advantage of those inactive.
  •  High performance - similar to the SAN.
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Virtual Private Servers in the world revolution Virtualization

4:19 PM | Posted by | | Edit Post
Virtual Private Server (VPS) is a virtual machine is sold as a service by Internet hosting service.VPS runs its own copy of the operating system, customers have access to the root level for that instance of the operating system, so they can install almost any software that runs on this operating system.For many applications are functionally equivalent to a dedicated physical server, and being defined by the software can be created more easily and configured. They are priced much lower than the equivalent physical server, but since they share the basic hardware with another VPS, performance may be lower and can depend on the volume of work in other cases on the same hardware node.

By default (Virtualization)

Virtual server is a driving force similar to those that led to the development of time-sharing multi-programming in the past. Although resources are still common, as in the time-sharing model, virtualization offers the highest level of security, as the default type used, individual isolated virtual servers and operating systems, most of the other and can work in itself, which can be re-alone independent start as a virtual instance.
It was the division of a single server to view multiple servers increasingly common on small computers since the launch of VMware ESX Server software in 2001. The physical server hypervisor usually works commissioned to create, release, manage and a "guest" resources, operating systems, or virtual machines. And the distribution of these guest operating a share of server resources of physical systems, usually in a way that visitors are not aware of other material resources than those allocated to it by the program of hypervisor. The VPS runs its own copy of the operating system, customers have access to the extraordinary level of this instance of the operating system, you can install almost any software that runs on the operating system, but Given the number of virtual clients usually run on a single machine and VPS usually has a limited time processor, and RAM, and disk space.
Although VMware and Frt- V dominate the default home for business, they are less frequent for VPS providers, mainly due to cost constraints - which generally use products like OpenVZ, Virtuozzo, Xen or KVM.

Accommodation hosting

Main article: Comparison of virtual hardware platform
Many companies offer virtual private server hosting or virtual dedicated server hosting an extension of the hosting services. There are many challenges that must be taken into account when proprietary software license in a multi-tenant virtual environments.With unmanaged or cars Managed Hosting, allows customers to manage its server instance.Usually host unlimited display with no limit on the amount of data transferred across the line bandwidth fixed. Typically, offered to host unlimited  with 10 Mbit / s and 100 Mbit / s or 1000 Mbit / s (with some up to 10 Gbit / s). This means that the client is theoretically able to use CT ~ 3.33 in the 10 Mbit / s ~ 33 TB 100 Mbit / s and 333 ~ TB 1000 Mbit / s monthly line (though in practice and the values ​​that will be much less). In virtual private server, it will be shared bandwidth and (should) means that there is fair use policy concerned. As host unlimited marketing is usually limited but generally because of the policies and conditions of service acceptable use. Offers unlimited disk space and bandwidth is always wrong because of the costs, and the ability to support the technological limitations.
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Best web hosting provider 2015

9:53 AM | Posted by | | Edit Post

How to choose the best web hosting provider

Without high quality web hosting, and your ability to run a website successful will seriously hamper. One of the worst mistakes you can make is to choose a web hosting provider at random. If there is a situation that calls for reflection and consideration and research, and the selection of sites is hosting provider. There is an amazing array of providers competing for your business web hosting services. How do you determine the best? Begin by keeping the following points in mind.

Technical Specifications

The first thing you need to do when shopping for a web host is to assess the needs of the space and display the disk bandwidth. If your site will include a lot of graphics, and dozens of pages and get a lot of traffic, you're going to need a decent amount of bandwidth and disk space. Packages are available is limited, and they make life easier. If your site is going to be simple and do not generate a large amount of traffic, and you should be able to get away with small amounts of disk space and bandwidth.
Keep in mind also compatibility. In the excitement of looking for a web hosting provider, you have forgotten something essential: the type of operating systems that are supported. You will not want to change the operating system, so check this before settling for a supplier.Reliability and availability are the key features to consider when shopping for web hosting. Best web hosting providers offered prices of availability of 98 and 99 percent. This is often called the "uptime". It is easy to make such claims, however, so be sure to see if it made their promises.Security is also a major concern. Choose web hosting provider without learning available security features is a big mistake. Should all be included things like firewalls, daily backups and user authentication. It is also nice to receive notifications when changes are made to it can alert you to suspicious activity.

Get an idea of ​​price and value

Some people choose a web hosting strictly on the basis of price providers. This is not a great strategy, but you should definitely consider the price. Providers provide better options for all budgets. In some cases, registration for subscriptions longer you get additional discounts.Also, try to leave you room to grow. It's great to choose a web hosting plan according to the current needs of your website. With a bit of luck, however, your site will grow and evolve over time. May change your needs. The move to the new hosting provider is a major concern, and so look for those that offer scalable plans. In other words, you should be able to switch to another plan easily if necessary. Low prices are always great, but if the price is low, with restrictions on space or bandwidth, and you want to make sure that this issue is really worth.Likewise, you may notice how it is providing many e-mail accounts. If you think you will need dozens of e-mail addresses or not, it's good to have the ability to create as much as possible. In most cases, the most expensive and include more e-mail addresses plans. This function is not very important to some people, but it is necessary for others.

Always investigate the support and customer service

Even if you're an ace to create Web sites, it is good to know that help is available whenever you need it. Make sure that the provider has a Web hosting service 24/7 support. Make sure there are ways to get the needed support. The most reliable providers to provide support via e-mail, phone and online chat.Includes free customer support to customers. Review its policies to ensure that you have a clear guarantee to refund if you are not satisfied with their products. After you've narrowed things a small number of candidates, and the reactions of research on the Internet each and every one. Ideally, it should be exams come from real people. Certificates of sites on the web hosting providers do not count. Should not take long to get an idea of ​​how the provider can treat their customers to host sites.

Find add-ons

In addition to providing the basics, such as bandwidth and disk space, a good web hosting plan includes at least a few extras. If you use an online store, and search for services that provide e-commerce solutions providers. If you want to be able to make quick and easy updates, to find a provider that offers content management systems. Make sure that you have access to statistics about your website as well.As tempting as it may be to just pick a web hosting provider and focus on your life, it is best to take your time. By doing this, you'll be able to find a supplier that you can stick with over the long term.
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Cloud Hosting Definition

9:04 AM | Posted by | | Edit Post

Cloud Hosting Definition

What is Cloud Hosting?

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Hosting is based on the most innovative technologies cloud cloud computing, which allows an unlimited number of machines to serve as a single system. Other hosting solutions (shared or dedicated) rely on a single device, while stressed cloud security hosting by many servers. Cloud technology allows easy integration of additional resources, such as space or RAM, and thus enable the growth of a website.


Cloud Hosting Benefits

The highest guaranteed level of performance site several machines
Content server resources (CPU, RAM)
Redundant data on the need for storage
No single point of failure
Flexible growth Site
Generous low prices and features

Cloud services who chooses to host?

SiteGround Hosting uses advanced virtualization system that provides customized for each site on the cloud server cloud resources. This means that even the smallest sites to take advantage of services such as a dedicated server a very affordable price. SiteGround cloud hosting offers predefined packages that are designed to fit any type of project on the Internet.
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    Web hosting service

    8:39 AM | Posted by | | Edit Post
    Web hosting service is a type of Internet hosting that allows individuals and organizations to make their website accessible via the World Wide Web service. Hosts a network of companies that provide space on a server owned or leased for use by customers, as well as connecting to the Internet, usually in the data center. Web hosts can also provide data center space and connect to the Internet and other servers in their data center, called the room, also known as housing in Latin America or France.
    The scope of hosting services varies widely. The simplest is web page and small-scale file hosting, where files can be uploaded via File Transfer Protocol (FTP) or a Web interface. The files are usually delivered to the Web "as is" or with minimal treatment. Many Internet service providers (ISPs) offer this service free of charge to subscribers. Individuals and organizations also get a host of alternative service providers Web page. Site on the personal web hosting is usually free, advertising-sponsored, or cheap. Business website hosting and often have higher expense depending on the size and type of site.
    Page Hosting one generally sufficient personal web pages. Complex site requires a more comprehensive platforms that provide support, database and application development package (such as PHP, Java, Ruby on Rails, ColdFusion, and ASP.NET). These facilities allow customers to write or install scripts for applications like forums and content management. Also, (SSL) general e-commerce is used Secure Sockets Layer.
    Host may also provide panel interface or control to manage Web server installation scripts as well as other units and applications such as e-mail service. Some hosts specialize in certain software or services (such as electronic) commerce, which are commonly used by large companies to outsource network infrastructure outsourcing.

     Types of Hosting

     The services can function online hosting Internet servers.
    Many large companies who are not internet service providers must be permanently connected to the Internet to send e-mails and files, and other sites. The Company may use the computer as a host site to provide details of their goods and services and facilities for online orders.
    Free hosting service: offered by different companies with limited services, sometimes supported by advertising, and is often limited compared to paid hosting.Shared web hosting service: are placed one site on the same server as many other sites, ranging from a few hundreds or thousands. Typically, all domains may share a common set of server resources, such as CPU and RAM. Features available with this type of service can be very basic and are not flexible in terms of programs and updates. Distributors often sell common websites and hosting companies often have a distributor is to provide customers crowd.Reseller web hosting: allows clients to become web hosts themselves. Can run distributors, individual domains, under any combination of these listed species, hosting, depending on who associated with them, such as retail. Distributors accounts may differ "significantly in size :. they can have their own virtual dedicated server to a server share offer many distributors joint plan almost similar service to host their own and provide technical support to provider.Virtual Dedicated Server: also known as Virtual Private Server (VPS), divides server resources into virtual servers, where resources can be allocated in a manner not directly reflect the underlying hardware. VPS is often allocated resources on a single server base for many VPS relationship but virtualization can be done for a number of reasons, including VPS container transfer capacity between servers. Users can have root access to their own virtual space. Customers are sometimes responsible for the repair and maintenance of the server.Dedicated hosting service: the user gets his own website and earns full server control over it (the user has root access to access the Linux / Director and Windows). However, the user generally does not have a server. A type of dedicated hosting is self-managed or unmanaged. It is usually less expensive for dedicated plans. The user has full administrative access to the server, which means that the customer is responsible for the security and maintenance of his own dedicated server.Managed hosting service: the user gets its own Web server but is not allowed full control over it (the user has been denied access to root access for Linux / administrator and Windows). However, they are allowed to manage their own data via file transfer protocol or other remote management tools. And is not permitted for the user full control so that the provider can guarantee quality of service by not allowing the user to change the server or is likely to create problems in the configuration. The user generally does not have a server. And committed the server to the client.Colocation web hosting service: similar to the dedicated web hosting service, but the user owns the server Colo. The company offers a host of physical space that the server takes and takes care of the server. This is the most powerful and expensive type of the web hosting service. In most cases, the supplier can deliver owned little or no direct support for their client's machine, providing only the electrical, Internet access, and storage facilities for the server. In most cases for colo, the client asks his official visit to on-site data center for doing hardware upgrades or changes. Previously, many owned suppliers accept any system configuration to accommodate, even in cases of mini-tower desktop style, but most hosts now require a rack mount enclosures and standard system configurations.Cloud Hosting: is a new type of hosting platform that allows customers powerful, scalable and reliable hosting based on load balancing servers are divided into blocks and utility bills. A website hosted cloud can be more reliable than the alternatives from other computers in the cloud can compensate when one piece of hardware fails. In addition, local power outages or even natural disasters are less problematic sites hosted cloud, cloud hosting is decentralization. Cloud hosting providers are also allowed to charge users for the resources consumed by the user, rather than a fee for the amount of the user expects it will be used, or initial investment cost fixed equipment. Instead, the lack of a centralized user can give less control over where their data is and can be a problem for users with security or data privacy issues.Accommodation is divided into blocks: the existence of multiple servers hosting the same content for better resource utilization. The clustered servers are the perfect solution for high-availability dedicated hosting, or creating a scalable hosting solution. the ability to host the base block Web services had been rejected. (Hosts usually use aggregated hosting plans for shared hosting, and also that there are many benefits for the collective management of clients).Web Hosting: This form of accommodation is dispatched when the block as a network server act consists of multiple nodes.Home server: usually a single machine placed in a private residence can be used to host one or more sites on the internet and broadband usually quality consumer. These machines can be built for the purpose, or more commonly old PCs. Some ISPs actively attempt to block home servers by disallowing incoming requests to TCP port 80 of the user's connection and by refusing to provide static IP addresses. A common way to achieve reliable DNS hostname for an account with a dynamic DNS service. Dynamic DNS service will automatically change the IP address that the URL points to when the IP address changes.Some specific types of hosting offered by web hosting service providers
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    History of cloud computing

    8:32 AM | Posted by | | Edit Post
    Cloud computing is computing terminology has evolved in recent times or a metaphor based on the utility and information technology resources consumption. Include cloud computing deployment of remote groups of servers and systems software that allows centralized data storage and online access to computer resources or services. Clouds can be classified as public, private or mixed.
    Cloud computing  on the basis of resource sharing to ensure consistency and economies of scale, similar to the tool (like the electricity grid) over a network. in the foundation of cloud computing is broader than the concept of converged infrastructure and shared services.
    Cloud computing, or, in short, simply a "cloud", and also focuses on maximizing the effectiveness of shared resources. And generally only cloud computing resources are not involved by multiple users, but also re-allocated dynamically on demand. This may work for the allocation of resources to users. For example, a computer clouds that serve users in Europe through the hours of work in Europe with a facility specific application (eg e-mail) may be re-allocated the same resources to service users in America North by working in North America watches with different applications (for example, a Web server). This approach should be to achieve the maximum benefit of the computing power and thus reduce environmental damage and since less energy, and air conditioning, and an enclosure area, and therefore there is a need for a variety of functions. With cloud computing, it can be for multiple access to a single server to retrieve and update their own data without the need to purchase licenses for different user applications.
    The term 'transition to the cloud "also refers to an abandonment of the traditional model of capitalism Organization (purchase special cutting equipment over a period of time) to model operating costs (use of infrastructure and cloud common pay it is used).
    Proponents argue that cloud computing allows companies to avoid the infrastructure costs in advance, and focus on projects that differentiate their business rather than on infrastructure.  Proponents also argue that cloud computing allows companies to get their operational applications faster, with better management and less maintenance, and be able to adapt quickly more resources to respond to fluctuations in demand and the company can not predict. cloud providers usually use a model "pay as you go". This can lead to high costs unexpectedly if the directors do not adapt to cloud pricing model.
    The current availability of high-capacity networks, and low-cost computers and storage devices has led and the widespread adoption of virtual machines, and service-oriented architecture, and autonomous and utility computing the growth in cloud computing.
    Cloud providers have rates of 50% per year growth.
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