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Asri-unix.1194 net.works utzoo!decvax!cca!sri-unix!mike@BRL Fri Apr 9 00:51:26 1982 UNIX & Remote disks From: Michael Muuss <MIKE@BRL> We have a home-grown UNIX-UNIX network with virtual disk access across the network, and local -vs- remote disk access is indistinguishable. Important details:

1) We use DEC PCL-11s (16Mbaud network hardware)

2) Home-grown, low overhead protocols ("BRLNET"). Testing indicates that we can bring 100 blocks/sec across the network with only about a 5% "network overhead" expense on the server end. (Both ends PDP-11/70 with MOS memory).

When we generalize BRLNET to run under InterNet IP, we expect the cost to go up, but it shouldn't be terrible.

3) Special "High-Performance" BRL/JHU UNIX Kernel (although the effects of this on the measurement cited above is small. Regular UNIX's may have perhaps twice the overhead).

More on all this if there is interest. -Mike

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