skyde
Joined 13 years ago
Joined 13 years ago
My son (7 years old) is gifted in Math and as a parent I find it extremely hard to decide how much I should push him (register him to math competition, weekend math club ...) and how much I should just let him get 100% on exam and not accelerate the learning.
Just wish it was open source :-)
Anyone know of an open source library like 3blue1brown Manim library that can work run client side in the web browser like Desmos ?
But I always wondered how polymath like Leonard davinci and Isaac newton that are excellent in many area are possible.
Linearizability requires that once a write is acknowledged, all subsequent reads should reflect that write.
if min-replicas-to-write is set to the number of Redis replica then if a single node goes down you won't be able to do any write (take lock or release lock).
if min-replicas-to-write is set to any number smaller than the total number or Redis replica some replica could still be lagging because of Asynchronous replication.
Also when a replica acknowledges a write in Redis, it means that the write has been received and logged by the replica, but it doesn’t necessarily mean that the write has been fully processed and applied to the data set.
This mean reading from replica that acknowledges a write from master might still return the Old value for the Key.
These algorithms ensure that a majority of nodes (a quorum) must agree on any proposed chAnge. This agreement guarantees that once a decision is made (e.g., to commit a transaction), it is final and consistent across all nodes. This strong consistency is critical in distributed systems to avoid split-brain scenarios.
This is easily caused by :
1-network partition
2-latency issues.
3-Async failover (2 nodes think they are the master)
4-replica lag (some but not all replica acknowledged the write) while master send confirmation to client
What you truly need is something like ZooKeeper and etcd that are designed to achieve distributed consensus using algorithms like Paxos or Raft.
This ensures strong consistency and reliability in a distributed system, making them ideal for tasks like leader election, configuration management, and lease management where consistency across nodes is critical.
By duplication I mean if context length is N there is many sequence of N word that are not unique.