Hi
What does "head" here mean?
"It would also be vulnerable to failures (a single speck of dust could cause a head crash and bring down the entire directory service). Furthermore, here too, valuable network capacity would be wasted shipping queries far away for processing."
The "head" is the component of a disk drive that moves across the surface of the disk, reading and writing data to and from the disk.
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The "head" is the component of a disk drive that moves across the surface of the disk, reading and writing data to and from the disk.