Saturday, October 23, 2010

Tape and disk both methods to



The use of tape and disk backup storage is that people often use the equipment. But between the two has been used in a separate environment. So what kind of environment, we can speak both be used? People mention data backup, think of the mind is the equivalent word "tape" can be said that along with the backup tape every stage of technological development, Everyone that is established by usage to the "data backup" and "tape" the equal sign. However, with the speed with disk backup, backup window small advantage, tape backup data is no longer the only media choice.

Industry debate on the tape and disk can be considered a long debate, since the ATA disk storage application, a storage industry hot topics. One group of people that the tape will be eliminated, and the disk will be the main backup media. Although there are many arguments in favor of the tape from a tape backup, replace, replaced by a disk backup sample, but the tape backup and archiving system still occupies an integral part. Moreover, especially in the application of virtual tape technology, tape and disk combination can be optimized data protection strategy.

Tape-based backup

As a traditional tape storage media can be described as deep-rooted, the disk moment you want to be completely out of the market, it is not possible to do. Will continue in the enterprise tape backup, recovery and archive strategy plays a central role.

With the disk drive prices down overnight, disk-based storage devices are blossoming out, some said the use of tape has come to dead end. IDC see the tape drive in 2006, the market will continue to be expanded. 100GB or larger drive shipments will increase, and, SDLT, LTO, SAIT drive shipments are growing.

Although the use of disk storage data, the price per GB decreases by more than a tape, but the whole, the present is still the cost of using tape backup data is lower. The distance between tape and disk will still be there, because the tape manufacturers are constantly reducing the cost of tape and improve its performance. In addition, the tape also has a compact, high capacity, low cost, long life and portability advantages. Moreover, the tape backup technology has been 50 years since birth, has withstood the test of time, is indeed a very mature technology, many business users have become accustomed to the use of such storage media, and this is one of its advantages.

The shortcomings of tape-based backup is focused on performance. Less search time and tape media, tape and disk transfer speed is compared, in a slower backup and storage. Unlike disk, tape, media must be controlled.

Tape and disk battle, for now, tape still has many obvious advantages, such as portable nature of tape and the tape will not be the same as the disk head damage problems. Therefore, the tape for those who require long-term archiving of data stored off-line users still have very attractive terms. And the transfer of large amounts of data when the cost of using the tape to be lower than the cost of using the Internet. There is also a fact we must face is that many IT organizations, especially those of large companies IT departments tend to refuse to change their long-term use of those products.

Disk backup

Disk-based backup strategy, one of the most powerful reason for the backup and recovery performance. Disk can access data directly, because no load or rewind, but also do not need to search for the tape volume data files. For the conventional environment, data is stored on disk, the disk read and write data at a rate significantly faster than many tape, storage, data management, it was easier, the time required for the backup window less.

Although the disk is a backup has some advantages, but the disk-based backup strategy has its drawbacks. Some backup applications, adjust according to their backup disk data structure, most of the disk device simulation into a tape device to back up. And a low-cost disk array back up, it can persist up to several weeks of backup data. It can not accommodate a large number of data for long-term retention. Utility will force the organization will eventually remove the backup device to removable media.

In addition, starting from the data security from viruses, hackers, security threats and natural disasters also needs to be considered. Place a site, power or communications infrastructure threats require a copy of the entity's data is stored in a place away from the base site, the fault repair can be used, which would increase the cost of disk backup. For archiving, the disk's life than tape media to be much shorter life span. Idle disk may be lost after one or two years of data or degaussing, except once every 30 days on the turn.

Can have both fish and bear's paw

Comparison of tape and disk on the debate, for tape and disk separately as a data protection strategy are to support and oppose the point of view. The most likely conclusion is reached: while both technologies will increase both with the advantage of both their weaknesses and provide a complementary environment. In addition, virtual tape technology is optimized to improve the two-tier strategy to achieve significant business value with the key.

Tape in the data center data protection strategy for the position has changed. Tape backup strategy will continue as an important part, especially for permanent data storage. Disk will be added as a choice to send the backup and storage functions required 24x7xforever operation. By combining the two technologies will be used for disk and tape backup platform with a short-term, efficient backup and storage, and long-term data archiving have been achieved.

Spectra Logic introduced for a unique, innovative products, namely: RXT Sabre. This technology combines the performance and reliability of disk and tape mobility, filled between the fixed disk and tape the vacancy. Through the perfect combination of disk and tape, RXT enables you to seamlessly and fast disk to existing backup environment: removable RAID disk.

RXT Sabre as part based on the traditional parts? C drive and removable media - RXT Sabre technology can quickly be integrated into standard backup platform and environment, and provide a complete disk - disk - tape (D2D2T) solution. RXT Sabre simulation and because the standard LTO tape drive, RXT Sabre medium is transparent to the backup software. RXT Sabre to provide you with a fixed disk performance and reliability advantages will also have the RAID data storage technology in order to facilitate the data off-line or off-site preservation.

RXT Sabre to help you increase your disk data center without a huge initial investment, no need to change your backup environment or backup strategy, without a new application or server, without much data center space requirements. Simply insert the RXT Sabre and then use it: Store the RXT Sabre media, offline storage, data center of its back once again to use it, it is very easy.

RAID will be moving through to automated tape library, you receive great benefits. Use the same backup strategy and policy, and continue to use the appropriate tape. For example, use tape as a long-term storage of data and inexpensive way to store frequently accessed data to the RXT Sabre, such as the recent and important use of commercial data.

Once RXT Sabre to Spectra T-Series libraries, the data stored in the data center will have two choices: tape and RXT Sabre media. RXT Sabre will be built into the repository, RXT provide near-line access to a recent data backup, disk? C disk ultra-high-speed buffer memory and disk? C tape option. Spectra RXT Sabre technology standard drives and media collection with existing robot can work together. Spectra tape library in a mixed tape and RAID disk, without any merger burden? C do not need new hardware, no new software or changing any infrastructure. RXT Sabre device is inserted to increase the RXT TeraPack medium, and then run. In a storage environment to increase the disk device is so easy.

Large data centers use both automated RXT Sabre as an off-site storage facilities, storage and distribution; for the DtoDtoT lifecycle management solutions, hierarchical data management; or use the RXT Sabre conventional remote office backup (can be used independently, directly and the server connection), RXT will be stored in the environment has been widely used.

All of a sudden there were two backup media, compare two media has great deal of diversity. Also equipped with tape and disk media as data protection and can easily use and management, why not.







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Wednesday, October 20, 2010

TMPGEnc --- MPEG compression King



Digital video cameras (DV) are now increasingly popular, with DV the film works to bring it for everyone to enjoy the best way is made into VCD or DVD discs, collected from DV in AVI format video files (DV-AVI or ordinary AVI), take it to disc engraved need to convert it into MPEG-1 / 2 format, which requires the MPEG encoding software. Although like "Ulead" This kind of video editing software has to support film and television works directly burn VCD / SVCD video discs, but the best thing to say that professionals MPEG encoding software TMPGEnc, use it to DV-AVI as MPEG and other encoding Nero and other software, then made into VCD or SVCD, picture effect no less professional-grade MPEG compression cards.

First, start the TMPGEnc Project Wizard will pop-up window (Figure 5), a "VCD, SVCD, DVD" three types of templates to choose from, each template has two NTSC and PAL formats, including DVD, the two formats were There are "low resolution" model that is used in the resolution of VCD, DVD disc that can be stored for up to 270 minutes of video. The pattern you choose will be right in the window are described in detail. If you want to make VCD, you can select the "Video-CD" under the PAL format and click "Next."






And then to "specify the source file", click "image file" after the "Browse" button to import video files, and other parts can be the default settings, no hell, go directly to the next step.

Next to "Filter settings", select "the scope of the source image" may specify the scope of encoded video file. You can specify the encoding of the starting point and end point, and can correct the synchronization between video and audio pitch. "Crop image" is used to screen for cropping the source images can be removed without the necessary edge. "Elimination of noise" is used to eliminate video noise, to optimize image results, setting the value to set if not understanding, directly on the screen to see the preview results. Under normal circumstances, you can ignore this step, simply click the "Next" on the line (Figure 6).






Finally, "rate set", VCD fixed rate 1150Kbps, without adjustment, SVCD up to 2600Kbps, DVD are generally set between 5000Kbps ~ 10000Kbps, if you can use the default settings, the next step after setting the Set the output file path and file name.

After the wizard to complete the operation into the main interface (Figure 7), press "Start" button to begin the conversion of MPEG. However, software-based MPEG compression at a slower pace, need a little patience.










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Monday, October 11, 2010

Maxthon filter floating Flash ads all captures


Maxthon (Maxthon) built a web content filter can filter out the advertising page image. But this filter in Flash for web page advertising can do nothing. Of course, install the appropriate plug-ins can easily remove the pages of Flash ads. But too many plug-ins installed Maxthon will run its own slow, and will procedures take up more system resources.

In fact, the use Maxthon own web content filter can filter out pages of Flash ads. Shown in Figure 1 is our target site has not filtered before the Tabs Flash ads.



Figure 1 Flash Ads Filter screenshot before the Web

To filter out Web pages Flash advertising, first of all necessary links to find out Flash ads, because ads directly Flash can not see it right click the link, so we have to view the source of documents to find the link Flash ads address. Figure 2 shows that in Maxthon View Source menu item. Similarly, clicking the right mouse button on the page you can find the View Source menu item.



Figure 2 View Source menu item

In the pop-up page source text file, we use ". Swf" as a keyword to find links to Flash files. Shown in Figure 3.



Figure 3 to find. Swf file

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