Next: Direct ECS access
Up: ASSORTED REACTIONS
Previous: Difficult to use
As indicated in the previous chapter, the system overheads were quite
high (e.g., on the order of 20 milliseconds per data block transferred
from the disk). In this chapter we will consider the possible effects
of some improvements we had intended to implement. In the next chapter
we will consider possible hardware improvements.
We had two intended improvements, both to the ECS system:
It is probably that these two changes, together with a minor change in
the disk system, would have reduced the per block overhead for disk
transfers to the order of 10 milliseconds for multiblock transfers.
- Direct ECS Access
- A subprocess could select a single data block in a single ECS
file and be given direct hardware access to its contents.
- Fast Actions
- A small number of ECS actions would be recoded in an ad hoc, but
hopefully more efficient, manner.