Can someone help me with the maths please. How does 6Gb SAS run 10 times faster that Ultra320 SCSI? A quick calculation in my head comes out to about 2.5!
Space-saving ideas for improving storage performance
Once upon a time pretty much the only thing a storage manager had to worry about was running out of capacity. Disk space was expensive and a slew of products offered data compression, moving disused files off to tape and so on. Disk space is pretty cheap now, with multi-terabit drives readily available along with petabyte- …
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Wednesday 6th November 2013 16:29 GMT M. B.
Sounds...
...about right (2.5x 2560Mb/s = 6400 Mb/s). Wiki backs that up. 12Gb is 3.75x the performance of Ultra320.
Load up a SAS bus with lots of SSD and load the controller up with front end 16Gb fiber channel and the bus itself may become oversubscribed under heavy load, further driving the requirements for better visibility, right from the application, on a VM, in a VM cluster, through an HBA, across the SAN fabric, into the front end of the SAN, through the write cache, then out the SAS bus to the the disks or flash modules sitting on the back end.
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