Lesson 1899 of 2116
AI Foundations: Ring Attention for Distributed Long Context
How ring attention shards the KV cache across devices to enable million-token contexts.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The premise
- 2ring attention
- 3sequence parallel
- 4long context
Concept cluster
Terms to connect while reading
Section 1
The premise
Ring attention rotates KV blocks across devices so each computes a portion without ever materializing the full attention matrix.
What AI does well here
- Estimate per-device memory
- Plan communication overlap
- Pick block sizes for your fabric
What AI cannot do
- Eliminate communication cost
- Work without high-bandwidth interconnect
- Replace activation checkpointing
Key terms in this lesson
End-of-lesson quiz
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