Design decisions
When architecting a system, it is inevitable to make certain high-level design decisions.
Some of these decisions, if they’re wrong, can lead to the re-architecturing and re-writing of the whole system some months later, so there is an incentive to keep things rather generic. On the other hand, trying to make system too generic is just another recipe to disaster (usually expressed in terms of missed deadlines and unmanageable code).
IT Hares try to describe certain not-so-obvious architectural decisions, and some considerations which should be kept in mind while making them.
MECHLOVE Blueprint - 2/7. Storage (ZFS-style) and WAL (template-based logical with physical hints)
October 7, 2026 by • “No Bugs” Bunny
Quote
One important feature of our WAL is that (because our Data Storage is CoW, and our checkpoint pages are perfectly consistent) it seems that we do NOT need to undo during recovery
Filed under: On.System ArchitectureDesign decisions
Read moreRadical MVCC and Replay-Based Rebasing OCC (Re2OCC)
October 5, 2026 by • “No Bugs” Bunny
Quote
Write-sets published at the point of obtaining CSNs are immutable and represent THE db history. Everything else is just views over this history.
Filed under: On.System ArchitectureDesign decisions
Read moreBringing Architecture of Operating Systems to XXI Century – Part IV. First Draft
November 8, 2019 by • “No Bugs” Bunny
Quote:
While L3 kernel can STILL run on MMU-less RAM-constrained MCUs, it provides responsiveness which is comparable to that of multi-stack kernels.
Another Quote:
multi-coring is essentially a special case of balancing shared-nothing nodes
Filed under: On.System ArchitectureDesign decisions(Re)ActorsOn.ProgrammingEmbedded
Read moreBringing Architecture of Operating Systems to XXI Century – Part III. Basic Ideas
May 9, 2019 by • “No Bugs” Bunny
Quote:
everything in the system should be a Finite State Machine (FSM)
Another Quote:
‘OS’ is not understood as ‘OS kernel’, but rather is defined by the apps which can run on it
Filed under: On.System ArchitectureDesign decisions(Re)ActorsOn.ProgrammingEmbedded
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