Storage
Memory (main memory) consists of
- very large random-addressable array of bytes
- can fetch single bytes into CPU registers
- can fetch multi-byte chunks into CPU (e.g. 4-byte int)
- typically: access time 0.1 µs, size 64 GB
Disk storage consist of
- very very large block-oriented storage
- often on spinning disk, fetching 512B-4KB per request
- typically: access time 30 ms, size 8 TB
- nowadays, SSD: access time 100 µs, size 1GB
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