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Next: 2.4 Read/Write Path Up: 2 General Ideas & Previous: 2.2 Compressing Cached Pages

2.3 Batching Multiple Pages Together

A second advantage offered by the cache is the possibility of batching multiple pages together to write them contiguously to disk. This idea was first proposed in the VAX/VMS operating system [9]. This can be easily implemented as the system does not need to decide the physical location of a set of pages until they are really sent to the disk. Furthermore, as the pages are compressed, many more pages are written in a single disk write, thus decreasing the time spent on disk accesses.

Toni Cortes
Tue Apr 27 17:43:22 MET DST 1999