milvus/pkg/master/README.md
rain 455b3ace2f Update segment struct and change collection to collection id
Signed-off-by: rain <boyan.wang@zilliz.com>
2020-09-16 10:40:04 +08:00

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# How to start a master
## Requirements
### Start a etcdv3
```
./etcd -listen-peer-urls=http://192.168.1.10:12380 -advertise-client-urls=http://192.168.1.10:12379 -listen-client-urls http://0.0.0.0:12379,http://0.0.0.0:14001 -initial-advertise-peer-urls=http://192.168.1.10:12380
```
## Start from code
```
go run cmd/master.go
```
## Start with docker
## What rules does master use to write data to kv storage?
1.find the root path variable ```ETCD_ROOT_PATH ```which defined in common/config.go
2.add prefix path ```segment``` if the resource is a segement
3.add prefix path ```collection``` if the resource is a collection
4.add resource uuid
### example
if master create a collection with uuid ```46e468ee-b34a-419d-85ed-80c56bfa4e90```
the corresponding key in etcd is /$(ETCD_ROOT_PATH)/collection/46e468ee-b34a-419d-85ed-80c56bfa4e90