Data Centers Concepts
To understand what a data center initially need to remember one of the main features of the functioning of the Internet.
The Internet is a world wide network that connects computer systems from all over the world in a decentralized manner. As it is decentralized, each node of the network is able to perform communication with others directly, exchanging information via connections to high speeds for fiber optic cable or satellite.
On each node data center is present, which is one of the key elements of the functioning of the Internet. This is where the servers are stored that host your website and is also leaving communication cables that lets your website to be found by visitors from anywhere in the world.
Data centers india are normally built in the form of large buildings and offers three basic services to its clients, those are an uninterrupted supply of power guaranteed by diesel generators, controlling temperature and humidity of the environment, and offers 24x7 Internet connectivity.
As it is expected that sites stay up and running round the clock, the servers that host them also requires to work uninterrupted. To achieve such level of operating, the data centers are usually powered by electricity from different substations, and come with diesel generators capable of supplying off with the power requirements of the servers in case of disruption in electricity supply.
Internet connectivity is an another aspect that should always be present in a data center, because without it the servers hosting your website can't communicate with other nodes of the Internet, allowing it to be accessible from all over the world. As in the case of electricity, this internet connection band is provided by more than one ISP, which helps to connect the data center via fiber optic cables for high speed internet.
The servers and other equipment are subject to overheating due to the fact that they worked 24 hrs a day without interruption, one of the services offered by the data centers is the controlling of the physical environment (ie. Temperature and humidity). This control allows servers to work in a limited temperature in data centers.
In the current market, the customers can use the data center services in two different ways: by hiring a dedicated server provider, that manages the data center or by opting colocation services, where you just rent the space and provides your own server to the data center.
Data Storage Systems (Part IV)
When building a system backup and recovery solutions, it require two major tasks:
- Reduction "backup windows (time stop applications - zero downtime);
- Reducing traffic data backup and cost of computing resources.
In the first task while shutting down the application can be minimized by using special techniques, such as the creation of snapshots, the idle time is calculated in seconds. A "snapshot" of the state and recording the location data. With this information, the data can be restored in case of loss or damage.
To solve the second problem, you can switch the architecture by using SAN, then backup and data recovery can be arranged without the use of resources, local area network (off-grid backup), as well as dedicated servers (server-free backup). Thanks to this centralized data backup scheme which reduces the number of devices (tape drives, etc.) involved in this process.
- For off-grid backup data from disk arrays shipped within SAN, Tape, connected directly to the storage network.
When we are copying data, it is moved from storage devices to tape without the direct involvement of servers - exchange data directly between storage devices inside SAN block-level data, but if necessary, may per-file revision recovery.
Read More : Data Storage Systems (Part I)
Read More : Data Storage Systems (Part II)
Read More : Data Storage Systems (Part III)
