vault backup: 2023-09-24 14:02:33

content/ASCN/T - Aula 1.md

@@ -1,4 +1,4 @@
-11 Setembro 2023 - #ASCN
+🌫 11 Setembro 2023 - #ASCN
 
 ## Complex Structures: Challenges
 ### 1. Deployment

content/ASCN/T - Aula 2.md

@@ -1,4 +1,4 @@
-18 Setembro 2023 - #ASCN
+🌫 18 Setembro 2023 - #ASCN
 
 ## Why distributed systems?
 - Modularity, decoupling different concerns.
@@ -83,4 +83,11 @@
 	- “Stub B” == Database Driver!
 	- “protocol B” uses SQL
 #### 6.1 State in multi-tier
-- 
+- Persistent state is harder to replicate and shard.
+- Computation is easier to replicate and shard.
+- No state in upper tiers:
+	- Web browser
+- Transient / cached state in middle tiers:
+	- Application server
+- Persistent state at lower tiers:
+	- Database

content/Excalidraw/ASCN/multi-tier.excalidraw.md

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 computation ^dYFK4TZu
 
-computation ^aoPldKAh
+persistent state ^aoPldKAh
+
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+
+state ^sz39cvIe
 
 %%
 # Drawing
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