vault backup: 2025-03-24 08:34:22

.obsidian/workspace.json

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Concurrent Systems/notes/6a - Alternatives to Atomicity.md

@@ -5,4 +5,12 @@ Let us define $op ->_{proc} op'$ to hold whenever there exists a process p that
 
 ![[Pasted image 20250324082545.png]]
 
-The problem with sequential consistency is that it
+>[!warning]
+>The problem with sequential consistency is that it is NOT compositional.
+
+Consider for example the following two processes:
+```
+p1: Q.enq(a); Q'.enq(b'); Q'deq()->b'
+p2: Q'.enq(a'); Q.enq(b); Q.deq()->b
+```
+