云计算要解决的问题比云存储更复杂

比尔盖茨认为云存储和云计算各有优势,但面临的问题不同。云存储模型清晰,主要解决数据分布与备份问题;而云计算则需应对网络延迟、离线及资源调度等挑战。微软正致力于简化云计算编程。

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一年半以前,比尔 盖茨在接受PC magazine的采访时,对云计算和云存储发表过评论

“There is storage in the cloud, which is clear that your file should be up there and geo-distributed and backed up, and there is computation in the cloud. Those are both great, appropriate things, but the one that is without any tradeoff is to have the logical storage master up in the cloud. The one that you have to be careful of is what about computation, because computation is not free. And you have big problems with latency, offline, and scheduling that resource, which is a finite resource. But we are actually taking some pilot customers and moving huge parts of their data centers into our cloud where we manage it for them. Over the next couple of years, a portion of the data centers will start to move. Some people say data centers will move to the cloud very quickly, but I tend to think it will vary a lot

So you have two things moving to the cloud to be clear. You have stuff that could be done on the client, like storage where the master moves up and you just do caching. Then you also have server-based computing that could move into the cloud. Well that's just a different data center, but it may be one that has the scale and pooling. With some of the early efforts, like the Amazon S3 stuff, it still forces you to write the program that understands there are different computers and how things work on that.

The thing we're doing that Ray Ozzie will talk about later this year at the PDC is how you make it easy to write those programs that are high-scale running in cloud data centers in a way that you really understand what is going on.”


对于盖茨的观点我的理解是:云存储和云计算都是很好的事情。但是两者有不同的地方,云存储的模型和要解决的问题很清楚,数据放在云端,本地是个数据缓存。而云计算就不那么简单了。必须考虑,网络延迟,离线情况,资源问题。数据中心向云端的迁移,还有难点和变数,可能不像一些人说得那么快。云计算的编程模型也是需要改进的,之前的亚马逊S3中,编程还需要考虑到云里不同服务器以及工作机制。微软要做的事是将云计算的编程变得更简单。

我在这段话中没有看出盖茨有表示“云存储会比云计算更流行 ”的意思。只是说云计算要解决的问题比云存储更复杂。这点我同意。

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