<<You may want to do some perusing of EMC's enterprise storage capabilities.>>
Frank, you keep going around my point (about the weakest link in a chain).
Yes, a 300GB file CAN be stored on disk - 16 PHYSICAL disks to be exact, using your EMC link. I'll ignore the fact that no SANE enterprise shop would elect to store files that size on disk, unless they had frequent need for fast data access to it (ala database, or SGI's special case).
OK, the file is on disk(s). How fast a data rate can you SUSTAIN in getting that file transferred? What is the EMC data transfer rate? ESCON channels are 200Mb/sec I believe - and that assumes NO ONE else is using it. How do you get the data to , say an OC-12 or OC-48 link without using multiple channels? Can one application even USE multiple data channels at a time for a single file transfer?
Multiple users can AGGREGATE that much data and more, but a single file transfer approaching those speeds under normal loads requires that the whole architecture be designed with one high speed user or application in mind.
In a server environment you have other weak links.
I repeat. It will be years before we can ROUTINELY transfer that much data from a storage device, across bus/channels, at a SUSTAINED rate approaching Silkroad speeds. |
