Author: kill me also must say
Cloud computing has become an irreversible industry trend, the concept of cloud computing, not only let the IT staff will be called experts proficient in cloud computing, many enterprise's chairman, general manager have checked the company's information construction, promote the transformation of cloud computing cloud company,
But, the truth about cloud computing, how much do you really know? Quickly understand the truth, let you become the friend heart true cloud experts! Otherwise, don't give others say you understand, otherwise B costly, no zuo no die!
(1) the cloud service providers often billed as more than 99.9% of the availability, actually in theory is difficult to achieve
Almost all claim to provide cloud service providers at home and abroad more than 99.9% of the availability, actually you never even for a long time, availability=regional geographical environment stability % * power availability data center availability * the percentage of the temperature and humidity in the normal range * network availability x server availability * operating system availability * storage availability Hypervisor availability x... , stability refers to the geographical environment is not a major geological disasters, the possibility of a force majeure, etc, such as high intensity earthquakes, floods, tsunamis, destroy the normal operation of the data center events such as riots, so the possibility of 99.9% means that a number of years can't millennial disasters occur, is possible? Confirmed land father-in-law? Well even if possible, even if the rest of the usability are 100%, 99.9% is most likely true, other parts of the usability is 100%, you believe it? Again such as data center room availability, Tier II is 99.741%, Tier III is 99.982% (Tier X is one of the data center room availability international standards), do you have several data centers of all regions to the Tier III standard? Several passed the certification of the Tier III?
So several 9 usability is manufacturer but just a publicity stunt, technical content is not big, only scare students who do not know,
High availability, of course, for the vast majority of users of public clouds is not so important, as the imagine of you on the web site on the cloud server, mail server or have to let people to rest for a few days in a year? Devotion to public clouds the thinking of high availability is not particularly wise!
Must be particularly high availability, two steps, first, on the cloud platform themselves through high redundancy achieve higher availability, second, go right, into a lama temple shakily, every day is said to have also compare the efficacy, if is ineffective, please review your RP,
(2) the cloud hosting the same configuration (CPU/memory/storage/network bandwidth), choose the cheapest (psychological: are all the same, bargain bai) or the most expensive (psychological: you sure good, buy a rest assured) of good, really?
We all know that cloud computing is based on virtualization technology (what? You don't know? Go side wall), the mainstream of the cloud service providers cannot make a physical CPU as 1 vcpu to sell to you, or else a cloud host less than $50 a month, you let the vendor to drink northwest breeze! As the saying goes, buy essence is inferior to sell, doorway all on this v in it (most of the world's most widely used cloud management platform, cloud service providers use it as a cloud management platform) management manual (Operation Guide), clear suggestion "general virtual server into a mainstream 16" virtual machine ", each virtual machine may provide one or more of the vCPU is! And different service providers to configure different types of CPU, computing power is uneven, it's hard to know what his propaganda 1 vcpu model (a critical leak age testing, you should know that a lot faster 586-386) of physical CPU virtual out how many to sell to you! According to the foreign professional media, sold a lot of small cloud host the United States is very cheap, the main reason is that they can from the southeast coastal areas of China custom prices below $150 a server, is a kind of cheated feeling? There's memory, do you remember when your notebook can be set using hard disk memory usage? Cry to die...
This is what to do? It is recommended that you run a few tests on buy cloud hosting program (authority is TPC, SPEC testing, such as simple as unixbench, etc.), to run on your laptop, you know compare the computing power of the vCPU king, of course, know everyone is busy, no time to get this something, you stole a baidu "cloud quality", "cloud service quality evaluation report" of what, look at the third party's report, silently remember, ornan turned back, and you tell the boss says you have personally do all kinds of authority test comparison, finally know the true nature of profiteers! (oh, I didn't say anything)
(3) cloud service technicians all is a master of cloud computing technology?
Pro, this I really don't know, I know that is the real cloud computing center, basic software automation management, personnel management involved in very few, remember a famous service provider operations staff recruitment, a requirement is "people will be able to move 20 jins weight", is to go to room move a blade fighting skill! Don't assume that people take to repair, the more likely is the somebody else to take away, in a cloud operators here, repairing the machine cost is too high to directly change new! Of course, many of them are really Daniel, at least a few atomic level higher than me, but it cannot say they feel face red ~
(4) want to see ah, you little heart stand, my life is not! Cloud service providers to shareholders to the sword, my first I escape, you, you, look at!
CodePudding user response:
Ha ha ` (* studying studying *) 'CodePudding user response:
CodePudding user response:
Good will bullshit, smiled.
CodePudding user response:
Although I also finished watching don't understand,CodePudding user response:
Go to find a few broken machine calculationCodePudding user response:
CodePudding user response:
Said a lot of sense!!!!!!!!!!CodePudding user response:
Cloud vendors are experiencing growth rates of 50% per annum.