The terms of Cloud Computing are sounding increasingly familiar to sailing daily on the Internet, where it has long been using without even realizing it.
Now it is a phenomenon known, many are taking to address the disadvantages that you have, such as dependence on one supplier, and not because the downtime ... something that has not fallen either to Google , Who has decided to go out and defend .
The position of Google is obvious, advocates using Web services, because much of their business depends on it.
One of his best-known services in this area is Gmail , which appears to have succeeded in assessing the criticisms of some who are against Cloud Computing , stressing that this fall has had historically.
Google know and admit publicly that their services may be unavailable all day, but at least ensures that they have a uptime 99.9% (that is not as much as 99, 99,999 or 99%, but it is still respectable).
To show that 99.9% is not so bad, the company has announced a study of the consulting Radicati Group , which highlights the problems faced by companies with solutions installed in their own environment .

As you can see, the times of downtime unexpected are lower for GMail , in connection with solutions as GroupWise (twice), Lotus (three) and < > Exchange (four times !).
In turn, the times of
downtime planned (eg for maintenance), are absent in GMail , while in other cases significantly exceeds even the times of downtime unexpected.
As the people of
Google , the fact that a service is not available, reduces the levels of employee productivity because they can not access the tools they use to be able to work.
On the other hand, as
GMail is mounted on an installation based on a set of servers (hence the theme of Cloud Computing ), the possibility that the whole structure fails, it is minimal ( as indicated by the time of downtime unexpected), while the maintenance can be done on a segmented, minimizing (or eliminating, at best) time downtime planned.
In other words, if the structure that supports the
Cloud Computing is well armed, it is highly unlikely that the services no longer be available to its users.
With this message, the people of
Google tries to bring a bit of calm for those companies that are in doubt about whether to migrate its services to the "cloud", although it seems to me that to defend itself from other disadvantages (such as dependence on one supplier), will have a much harder task ahead.
In conclusion, the
Cloud Computing is not a magic solution (or new, as we said at the beginning), but neither is an option that we should discard. Like all the alternatives have their advantages and disadvantages, so each company must assess whether it really suits him.
As for the users ... if they are not tied to a company, the solution of
Cloud Computing really seems miraculous ... and especially now that everything is as "mobile", but should not lose sight of the disadvantages but ... in the future could find themselves with the typical sage who reproached them with a "I told you ".
Link: Google
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