Shulou(Shulou.com)06/02 Report--

Now, when enterprises deploy data networks, there are generally three ways. First, das,das is to hang storage devices directly on each node, and the data is stored on storage devices of each node. For example, one hub followed by five pc, 80g hard drives, this is called das. In fact, there is nothing special. I want to save files, which can be put on my machine or on the shared disk of other machines. Ha ha, this is das, unable to manage, because it is too decentralized, everyone can turn off sharing, you can do nothing, hehe.

Again, nas,nas actually wants to be a PC with a large hard disk capacity on the Ethernet network as a file server, just like this, but it is made into a different appearance from pc, with more disk slots, generally made into raid5, generally embedded with windows storage server (some are also ordinary 2000 server) operating system, in response to Ethernet customer requests, every node can see it as a file server. It can be used as a network file system for systems such as windows,unix,macos,netware. This is nas.

San is a completely different so-called "network" from the former two. In fact, it is not a network in the traditional sense. It just extends the scsi data line and encapsulates it with fc (fibre Channel) protocol, so that it can transmit faster and farther. And make it into a switching mode, so it is called storage area network, not host network, which can only run data flow, unlike the real network like Ethernet. San is a "rear network", which can also be called the second network. The first network is that lan,lan directly faces client requests. San was born to run data streams faster.

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