CONSCIOUS CONSISTENCY WITH AKKA CLUSTER, CRDTS AND DISTRIBUTED DATA
summary
Akka 2.5 ships akka-distributed-data with a replicator (~3,000 lines) exposing CRDTs and selectable consistency: read local vs read majority and update functions. Implements G-Set, G-Counter/PN-Counter (per-node slots, pruning for removed nodes), LWW-Map and observed-remove set, supports delta gossip to avoid full-state shipping, and warns about overflow, garbage-pruning and LWW anomalies; demonstrates a global shopping-cart design and quantifies risk (e.g. tolerated 6/10,000 diverging carts vs stricter financial needs).
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chapters (31)
- 0:00Introduction
- 0:52Roadmap
- 1:09DTS
- 1:34Cluster
- 1:49Consistency
- 4:48Concurrent
- 5:09High availability
- 5:49Optimized config
- 6:24Shopping cart service
- 6:40Consequences
- 7:12Price to be paid
- 7:28Convergent Conflict 3
- 7:44Incremental Conflict 3
- 12:13Monotonic Joint
- 12:40Least Upper Bounds
- 13:32Aji Counter
- 14:52Solution
- 16:14Nodes
- 17:00Counters
- 18:25Global Conditions
- 19:08Clever Ways
- 19:18TMS System
- 19:35CIDTs
- 20:25Observed Removed Set
- 21:24Replicator
- 21:48Naming
- 22:08Get
- 24:04Shopping Cart
- 27:39Interface
- 28:47Multimap
- 29:08Data for 25
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