19 lines
1.0 KiB
Org Mode
19 lines
1.0 KiB
Org Mode
#+TITLE: CLOSOS: Persistence by Default (Single Memory Abstraction)
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#+ID: closos-memory-persistence
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#+DATE: 2026-03-22
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#+FILETAGS: :architecture:lisp:os:closos:persistence:
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* Concept
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CLOSOS eliminates the distinction between volatile primary memory (RAM) and permanent secondary memory (Disk). Primary memory functions as a transparent cache for a persistent object store.
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* Key Principles
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- **The Living Image:** The system state is permanent. "Saving" is not an explicit user action; changes are inherently persistent in the object store.
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- **Undo Facility:** Since data is permanent, application writers are encouraged to implement sophisticated undo/redo facilities rather than manual file saves.
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- **Atomic Snapshots:** High-integrity state is maintained via atomic flips and log-structured techniques, ensuring the system can recover from crashes without data loss.
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* Source
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:PROPERTIES:
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:ID: 9c69a9ab-1c96-490e-9a8e-fbeafacba30e
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:END:
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- [[attachment:strandh-lispos.pdf][Robert Strandh, "CLOSOS: Specification of a Lisp operating system" (2013)]]
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