- What do Etcd, Consul, and Zookeeper do?
- Service Registration:
- Host, port number, and sometimes authentication credentials, protocols, versions numbers, and/or environment details.
- Service Discovery:
- Ability for client application to query the central registry to learn of service location.
- Consistent and durable general-purpose K/V store across distributed system.
- Some solutions support this better than others.
- Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state.
- Service Registration:
- Centralized locking can be based on this K/V store.
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#include <math.h> | |
#include <stdint.h> | |
#include <libdragon.h> | |
typedef double vec3[3]; | |
const double epsl = 0.0000005; | |
// vector dot product | |
static double dot(vec3 v0, vec3 v1) { | |
double x2 = v0[0] * v1[0]; |