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Waana IT Hero in your office...... come on pick up ur question.......

Started by dhilipkumar, Sep 13, 2008, 05:23 PM

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dhilipkumar

Data center : Network infrastructure

Communications in data centers today are most often based on networks running the IP protocol suite. Data centers contain a set of routers and switches that transport traffic between the servers and to the outside world. Redundancy of the Internet connection is often provided by using two or more upstream service providers (see Multihoming).

Some of the servers at the data center are used for running the basic Internet and intranet services needed by internal users in the organization, e.g., e-mail servers, proxy servers, and DNS servers.
Network security elements are also usually deployed: firewalls, VPN gateways, intrusion detection systems, etc. Also common are monitoring systems for the network and some of the applications. Additional off site monitoring systems are also typical, in case of a failure of communications inside the data center.


Applications

The main purpose of a data center is running the applications that handle the core business and operational data of the organization. Such systems may be proprietary and developed internally by the organization, or bought from enterprise software vendors. Such common applications are ERP and CRM systems.

A data center may be concerned with just operations architecture or it may provide other services as well.
Often these applications will be composed of multiple hosts, each running a single component. Common components of such applications are databases, file servers, application servers, middleware, and various others.

Data centers are also used for off site backups. Companies may subscribe to backup services provided by a data center. This is often used in conjunction with backup tapes. Backups can be taken of servers locally on to tapes., however tapes stored on site pose a security threat and are also susceptible to fire and flooding. Larger companies may also send their backups off site for added security. This can be done by backing up to a data center. Encrypted backups can be sent over the Internet to another data center where they can be stored securely.

For disaster recovery, several large hardware vendors have developed mobile solutions that can be installed and made operational in very short time. Vendors such as Cisco Systems, Sun Microsystems, and IBM have developed systems that could be used for this purpose.

dhilipkumar

What is DTS-WAV files

What exactly is a DTS file? DTS is a multi-channel, usually 5.1 or 7.1, home theater lossy encoded audio format created by Digital Theater Systems.

DTS is available on DVDs, but not lossleess, and for this guide we will be playing back DTS-WAV files which have come from enhanced audio-CDs or from concert DVDs or DTS CDs.

It is important to have AC3Filter installed. AC3Filter is an open source AC3 decoding filter that allows you to watch videos with AC3-encoded surround audio.

After you install the filter, all video players, including Microsoft's Windows Media Player, that use DirectShow, should be able to play AC3 and DTS audio correctly. Filter also supports ProLogicII audio as well.

After you have installed AC3Filter, open AC3Filter Config. (Start->All Programs->AC3Filter->AC3 Filter Config) and head to System. Then make sure DTS is selected.


aadhar

Blu-ray is the successor to DVD. The standard was developed collaboratively by Hitachi, LG, Matsushita (Panasonic), Pioneer, Philips, Samsung, Sharp, Sony, and Thomson. It became the default optical disk standard for HD content and optical data storage after winning a format war with HD-DVD, the format promoted by Toshiba and NEC.

The format's name comes from the fact that a blue laser reads from and writes to the disc rather than the red laser of DVD players. The blue laser has a 405 nanometer (nm) wavelength that can focus more tightly than the red lasers used for writable DVD. As a consequence, a Blu-ray disc can store much more data in the same 12 centimeter space. Like the rewritable DVD formats, Blu-ray uses phase change technology to enable repeated writing to the disc.

dhilipkumar

thanks for the detail explanation about blue ray....

keep share wit us.....

dhilipkumar

USB 3.0 - You Need to Know

now there’s an upgrade to USB on the way. Here’s what you need to know about the coming USB 3.0.

• It’s fast: Dubbed Super-Speed USB, it will offer transfer speeds of 4.8 Gbps compared with High-Speed USB 480Mbps transfer speeds.

• It’s backwards compatible: Your existing USB 2.0 stuff will also work on the 3.0 ports and vice versa, although you won’t get the “super speeds.”

• It’s coming soon: Vendors will ship some boards at the end of this year, so mainstream consumers should see them on their computers and certain devices starting in 2010.

• It’s powerful: Like USB 2.0, it will transmit electricity, which means you can still use it to charge your gadgets.

• It’s energy efficient: It supports reduced power operation and an idle power mode, but it will still make your CPU work like crazy to help it reach those fast data transfer speeds.

• It’s backed by all vendors: Early on, both AMD and Nvidia were kind of miffed at Intel for holding back on some of the specification details, but that’s all over, and everyone’s now on board.

• It will end the longing for FireWire’s resurrection: The faster speeds will mean that sending data to an external hard drive isn’t as grindingly slow.

• Or will it instead keep the FireWire flame lit? Without the threat of FireWire competing against USB products, it’s possible we won’t see prices for technology drop as rapidly as they did with previous generations.

• Devices that generate big data will be the first to appear with the standard. Large flash drives, hard drives, video cameras and high-end cameras will be the first to have the technology because they can benefit from faster data transfer rates.

• It’s a way to create the anti-cloud: Instead of accessing everything online either through downloads or streaming, you can store gobs of content on hard drives, and have relatively fast access to it with USB cables. That might be handy if strict data caps are implemented or you think you’ll be without broadband for a while.

dhilipkumar

[font=trebuchet ms]Petaflop[/font] -

A petaflop is a measure of a computer's processing speed and can be expressed as:
A quadrillion (thousand trillion) floating point operations per second (FLOPS)

◙ A thousand teraflops
◙ 10 to the 15th power FLOPS
◙ 2 to the 50th power FLOPS
In June, 2008, IBM's Roadrunner supercomputer was the first to break what has been called "the petaflop barrier." In November 2008, when the annual rankings of the Top 500 supercomputers were released, there were two computers to do so. At 1.105 petaflops, Roadrunner retained its top place from the previous list, ahead of Cray's Jaguar, which ran at 1.059 petaflops.

Breaking the petaflop barrier is expected to have profound and far-reaching effects on the future of science. According to Thomas Zacharia, head of computer science at Cray's Oak Ridge National Laboratory in Tennessee, "The new capability allows you to do fundamentally new physics and tackle new problems. And it will accelerate the transition from basic research to applied technology."

techtarget

nuttewz

That's great news!


 :agree  :agree  :agree








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pradeep prem

its really amazing good to know this
his should have this easy to get question

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