Store three straight sets Shan Cun, magnetic disc and tape framework
At Techday summit of Brocade, a spokesman of AOL says but the magnetic disc is the new filing if the flashing memory is a new magnetic disc. Is this sentence of his only a joke?
Not that I think. I think we are seeing that store the arrival of century newly. In this new memory era, Shan Cun is used for storing the master data, the first layer of data; The large capacity disk is used for bearing the weight of second data and backup data; Become and file the media of the data again in tape. This is like one ” The winning three times successively type ” .
Storing it in the comment of the company of the front from location, we can see the chassis of this winning three times successively type is as follows:
-EMC, through utilizing VNX system of flashing memory to sweep away heroes in the file TPC stake test in a large amount. China fights back through the way that one fully utilizes the disk system of the control device for – Symantec. However, the developing direction of the industry is clear. A supplier does not assault these ranks with system based on magnetic disc in the future.
-SPC-1 arranges a star and is monopolized by the flashing memory system, no matter in terms of characteristic or in terms of cost performance –The flashing memory system will make large progress in cost performance.
You no longer worried on want until how much magnetic disc come on, deal with the intersection of I/O and intensive the intersection of memory and work load on earth future. I/O characteristic of the flashing memory takes a order of magnitude higher, and the cost performance is better. Future main memory will not be limit to the access speed of the picking up head of the magnetic disc again.
As for the large data storage of TB grade, flashing, storing in can’t match with magnetic disc yet on the cost. Even the flashing memory of multi-layer unit of 2 bits is replaced by 3 bits of flashing memory, the density of the magnetic disc increases will still for the advantage of certain magnetic disc. Seagate has just claimed to put out magnetic disc technology of 3.5 inches of TB grade, will sell the driver of a section of magnetic disc 3TB capacity 3 at once, and if willinging, it can also introduce the driver of magnetic disc 5TB capacity 5.
The future direction is very clear. Mainly storing the enterprise layer, the flashing memory will become master media, and the data left will be put on the magnetic disc –SAS or SATA 10,000 transfers to and 7200 is transferred to the magnetic disc. Those do not need the so high characteristic of flashing memory or small enterprise affording the price of flashing memory to say, they can utilize the magnetic disc. The enterprise layer application under some similar situations can be like this too. Disposing the compound driver of cache of the flashing memory becomes a kind of more high-performance choice, suitable for needing the situations of high performance and high capacity at the same time.
Tape
On the other hand, the magnetic disc will be used in long-term data storage, especially those need moving fast between different places and different data centres machine formatly Virtual IT environment, just like cloud computing mechanism. But magnetic disc, sustain the collinear magnetic disc, will face the wrong risk of the cumulative data all the time: For example the intersection of valley and the intersection of song and mail face like that once.
It was Oracle Streamline 8500 magnetic tape libraries and LTO-5 tapes that helped the valley song mail to go out of the mire. Though is off lining, plan to be used in the high-capacity magnetic tape library at any time, the tape is a final outfielder. It is a life buoy of the data centre. Without it, when the data centre meet data losing and data corruption storm, you are over. So simple.
The tape is just like a box of napkins. While needing, really, you need it.
The unit GB cost of the tape gets rid of several streets of magnetic disc. Pass the completeness detection library software of media of today, the reliability of the magnetic disc is much higher than the magnetic disc too. The tape casket will not collapse. The tape casket will not be always operated and consumed the electricity continuously, will not produce the heat which need cooling, the most importantly, it will not be always online, will not suffer very quick the data of quick repeated data or file deletion are rewritten.
The tape is very cheap, safe and reliable. Without media that can substitute the tape, unless you assume the magnetic disc is safe. What question the valley song that you can ask it has suffered. You can ask Amazon why is it in obliterated data under accident and why VMware meet the same thing too. The tape is your sanctuary inside the storm valley –Each data centre that disposes the array of the disk drive faces the risk.
This is to store the iron trigonometry in the front: The flashing memory is used in high-speed application; The magnetic disc is used in large second data and backup data; The tape is used for filing.
Tags: data storage, memory system, disc increases, access speed