13 myth and truth about the tape
The tape once come to the dead end by the prophecy more than ten years ago, it was the ultimate data which every large small enterprise can’t forget that protected tool and key technology even to this day! Why can the tape be through the test of time on earth? And how much myth are people full of the tape? Reveal the truth of the tape one by one to you now!
The myth 1: The tape is very old
The truth is
The television has come out for 75 years, it has already been 125 years too since the telephone is invented so far, the car has a history of over 100 years especially. The tape develops into the science and technology of another kind of popularization progressively too; In fact, the tape is similar to time that the hard disk coming out!
The myth 2: D2D offers the perfect data to protect
The truth is
The tape is to do the strange land to keep after storing off-line, in order to reach the enterprise layer medium that the real data protected.
The myth 3: The hard disk is cheaper than the tape
The truth is
The present hard disk is not cheaper, can not either later.
The memory mediums of the magnetic tape deck, loading automatically machine, and tape storehouse can be carried easily, offer the unrestricted spare capacity. Every the intersection of GB and the intersection of cost and about USD0.04, tape can wheel, for use, you either will lose old data because of storing the new data continuously.
Take backup and filing of 10TB data as examples:
>>10TB stores to the hard disk = Daily every GB needs to cost the cost US$0.2, needs US$73 in one year in other words, the cost of 000
>>10TB stores the tape to Tandberg Data LTO-4 = Needed cost US$8 in the first year, 250, the annual cost was lower than US$1, 000 hereafter
Use tapes to replace the memory system of hard disk, can probably save US$64 in the first year, 000, can also save US$72 every year later on, 000.
The myth 4: Amalgamate the data in the hard disk, the data environment contributed to ‘ afforest even more ‘
The truth is
In fact, the tape has energy efficiency even more than the hard disk.
It amalgamates data to be pieces of good idea, tape ‘ have electric medium ‘, transfer to tape fastening the disc hard disk data, can let the company save more electricity and money cost.
The myth 5: The tape has slowed down the whole network speed
The truth is
In D2D2T environment, the tape can never influence the speed of the network.
All servers convey the data to the hard disk to back up, it is only and linking up the bridge among the tapes to back up the device. If the hard disk is that the excellent online data back up the solution, then the tape has data of economic benefits to file the scheme most efficiently and most.
Tags: science and technology, test of time, 100 years
The rich department continues the cloud network and innovates and puts out CloudPlex technological framework
In the cloud network, Fabric is the most key technology. “Though many manufacturers have proposed Fabric solution, can buy on the market, there is only one rich department up till now. ” Remind the numerous medias and analysts participating in the conference like this on lecturing in opening of the summit forum on day of the rich scientific and technological skill of 2011 years that the rich department CMO John McHugh holds on May 3.
Rich department CMO John McHugh
Rich department’s cheif technology officer Dave Stevens
At the summit forum, rich department borrow tendency, release multiple cloud optimize newest progress of network in hold the intersection of technology and day for ten year already by this, help users to make the transition to privately owned cloud, public cloud and mode of the mixed cloud. ” Virtual Have already changed the applied characteristic fundamentally. Separate application from infrastructure and realize the maximal one within the range of whole enterprise excursively, this is a idea of the fictitious enterprise. And this will release privately owned cloud, public cloud and mixed cloud,etc. Various clouds calculate formal real potentiality ” . The rich department’s cheif technology officer Dave Stevens has released wishing the scene of the fictitious enterprises of rich department in describing the cloud optimized the network future speech, and recommended wishing new architecture CloudPlex the most of the scene in order to realize. Through CloudPlex framework, users’ IT environment can be expanded, can manage and spread all over tens of thousands of virtual machines in enterprises and the cloud.
CloudPlex framework includes three major parts; Fabric, globalization and exploration. Some of parts have already is listed and releases, such as Ethernet Fabric and fiber channel Fabric, the simultaneous support fiber channel released on the same day, Ethernet fiber channel FCoE And many the intersection of agreement and rich department 1860Fabric adapter of Ethernet connection, and the high performance used for network traffic load balancing of distributed data centre is employed and delivered to products,etc..
Fictitious enterprises are not that any manufacturer can realize single-handed, the opening of CloudPlex framework is essential. The rich department will offer including server’s, storing, supervisory routine and cloud optimizing the virtual computation module of the network through cooperative partner and system integration trader. The rich department will also support standards such as OpenFlow, OpenStack Compute and OpenStack Storage,etc. at the same time.
Tags: tens of thousands, new architecture, fiber channel, network fabric, key technology, virtual machines, technological skill
2010MWC conference opens on the 15th Over 120 enterprises exhibit
” 2010 moves the world conference MWC ” Be held in Barcelona of Spain on the 15 – 18 of February soon, ministers and the whole world from 40 countries will exceed 120 manufacturers to participate in the exhibition when the time comes, and the high tube of enterprise including Lu YiMin, president of CHINAUNICOM, will make a subject speech.
Chief marketing officer Michael and O’Hara Michael O’ Hara of GSM association Show, this top exhibition is abundant in content, contain all respects of the mobile communication field, a lot of experts in the industry come on invitation too. The conferee will experience such as medical attendance that the latest most advanced key technology of mobile communication is here, development and achievement in fields such as finance, media and amusement,etc.. All these galas of letting wife of becoming industry of World Conference on mobile communication can’t be absent.
The following is that new 2010 definite moves lecturer’s list of the world conference theme:
President
Tags: key technology, chief marketing, communication field, medical attendance, finance media, mobile communication, gsm association
TD-LTE key technology: Duplexing, many location and many aerials of time
On the development gradual progress of the wireless mobile communication standard, some characteristics of TD-SCDMA are being paid attention to, have adopted the technology too, and absorbed the design philosophy of some TD-SCDMA in every follow-up standards such as LTE,etc.. Duplexing technology, much location access technologies, three pieces of key technology based on that many aerial technology of MIMO/SA is TD-LTE standards based on OFDM of TDD.
TD-SCDMA the third generation of mobile communication standard that China acts on one’s own Development that gradual progress each being old for stage: First stage is from 3GPP the third generation of partner’s plan R4 standard is standard, second to R5/R6/R7 for subsequent TD-LTE TD-SCDMA gradual progress technologies subsequent stage Gradual progress standard.
Through the research, development of TD-SCDMA products, we see TD-SCDMA is because of TDD duplexing time as one Standard and technology,its technological last a lot of advantage characteristic. See, on the development gradual progress of the wireless mobile communication standard, some characteristics of TD-SCDMA are being paid attention to at the same time, have adopted the technology too, and absorbed the design philosophy of some TD-SCDMA in every follow-up standard.
TD-SCDMA has a lot of advantages
The technological characteristic of TD-SCDMA: The first is based on the duplexing technology time. The second is TD-SCDMA flexible much location way, for the management and managing and bringing convenience of resources, have offered the space for improving network performance. The third is that the intellectual aerial technology brings the advantage for respects such as network covering, interference inhibiting from, data speed,etc.. Fourth is a short code CDMA code division multiple access With the low yard of speed, and complete time slot structure. The fifth is empty mouthfuls of course optimized, one layer of application that has actually drawn lessons from TD-SCDMA of physics in TD-LTE. The sixth is the synchronous mechanism of the system, TD-SCDMA technology is to need the system to be synchronous, the assessment to LTE-FDD performance, also set up and pay analyzing on the basis of moving ahead simultaneously.
The mobile communication system has the three basic characteristics: First, the dynamic characteristic of the channel; Second, the mobile subscriber’s dynamic characteristic; Third, the dynamic characteristic of the mobile communication business. Three major dynamic characteristics of mobile communication, in fact has determined us to systematic research, course of standard gradual progress development of mobile communication too.
Datang move, consider development and the intersection of gradual progress and question, pairs of TD-LTE, IMT-Advanced senior international mobile communication on the basis of TD-SCDMA TDD orientates as the gradual progress edition of TD-SCDMA, extends and develops the achievement of China in the field of 3G.
TD-LTE three major key technology
There are several pieces of key technology in TD-LTE: The first is the duplexing technology based on TDD. Inside TDD way, the duplexing way switched over in TDD time is the duplexing course of defining it in a frame structure.
Consider FDD divide while discussing TDD system frequently duplexingly The system, in TDD/FDD bimodulus, LTE norm offered the commonality of technology and standard. We will notice the basic difference between TDD and FDD. Different to spectral demands at first, it is different to receive and dispatch the working way of the radio frequency. TDD apparatus needs to carry on the frequent change-over switch of receiving and dispatching, FDD needs to isolate and send and receive the duplexing wave filter of the passway; It is a time interval that TDD mode is distributed, it is a frequency band that FDD mode is distributed. Secondly, TDD and upper and lower competent channel of FDD symmetry different, the intersection of P2P and reciprocal network technique in the future Will feel this difference while employing obviously. Finally, two kinds of systematic ones demand synchronously to be different. Compared with difference of FDD system, make us need to consider wholly when the key parameter of the system is designed in the future through TDD.
Second key technology is OFDM perpendicularity divides and replies and uses technology frequently . Among them there are two keys, first, OFDM technology and MIMO input and export more more How to combine technology, make the systematic function of mobile communication further promote; Second, OFDM technology is under the terms of group’s network of mobile communication of the honeycomb, how to overcome and organize the question that the network brings frequently.
OFDM has one’s own advantages, for example it is multipath to resist and propagate and the alternative decline ability of frequency is strong, dynamic channel assign technology make system reach most large transfer rate, resist ability better than single signal carrier system to whom pulse interfere with, spectral efficiency is higher than the serial system.
The interference question in the Residential Area in OFDM, in order to have wireless inserting, wired maturity technology that inserts now, the interference in the Residential Area can be dispelled or avoided more easily.
The third is many aerial technology based on MIMO/SA. Intellectual aerial technology is through composing the shape, offer and cover and coordinate the technology of ability with the interference. MIMO technology offered different transmission ability through many aerials, the ones that offered the space to reply and use were gained, these two kinds of technology are very important technology in the subsequent gradual progress systems of LTE and LTE. We pay close attention to MIMO technology and combination on the subsequent gradual progress of intellectual aerial technology very much at the same time.
Adopt many aerial technology, on one hand performance needs, on the other hand it is a need of the follow-up standard gradual progress. Many aerial technology proposes some indexes, can offer the space to reply and use and transmits and grade in many aerials are used.
The dispositions of many aerials in LTE, falling can support the sending of single antenna, two aerials, four aerials, support the application of the intellectual aerial at the same time, can be with over four aerials, such as the application of eight aerials. It is that a single antenna is sent to upgo, do not get rid of application of many aerials in follow-up. In the standardized course that many aerials employ inside LTE, through many kinds of efforts, in last April, 3GPP standard organization accept intellectual the intersection of application and as TDD mode characteristic one of of aerial finally.
3GPP has already started LTE-Advanced project at present, need to support higher peak value speed, higher spectral efficiency, and higher user’s throughput and user’s number, also need further improving the experience of the edge users of Residential Area.
Tags: code division multiple access, improving network, china acts, third generation, network performance, design philosophy, time slot