Memory Hierarchy

• Computer Systems
• Implementation of Principles of Locality.
• Solution to the Memory Wall.
• Use layers of memory to hide the delay of memories.

Memory	Latency
L1	1ns
Ram	100ns
SSD Random Read	20µs
Datacenter Roundtrip	0.5ms
Rotating Disk Seek	3ms
[[United States of America|US]]-EU Roundtrip	150ms