【ETCD】Analysis of the underlying mechanism of ETCD Defrag
1. Related source code server/storage/backend/backend.go#defrag()
server/storage/backend/backend.go#defragdb()
2. Why do we need defrag When we use K8s clusters daily, if we frequently add or delete cluster data, we will find a strange phenomenon：
Even though the amount of object data in the cluster has not increased significantly, the disk space occupied by etcd data files is increasing. At this time, check the relevant information. etcd officially recommends using the defrag command of the provided etcdctl tool to defragment the data of each etcd node：
Posted by Hao Liang's Blog on Saturday, December 18, 2021
