tidb scale in and out
Less than 1 minute
tidb scale in and out
reference
- https://docs.pingcap.com/zh/tidb-in-kubernetes/stable/scale-a-tidb-cluster/
introduction
- Horizontal scaling of TiDB is achieved by increasing or decreasing the number of Pods, and operations on PD, TiKV, and TiDB will be carried out in the order of the replicas value.
- Scaling In: Decrease the replicas value of the component, and delete component Pods in descending order of the Pod number.
- Scaling Out: Increase the replicas value of the component, and add component Pods in ascending order of the Pod number.
Horizontal Scaling of PD, TiKV and TiDB
- for PD
kubectl patch -n tidb-cluster TidbCluster basic --type merge --patch '{"spec":{"pd":{"replicas":5}}}'kubectl patch -n tidb-cluster TidbCluster basic --type merge --patch '{"spec":{"pd":{"replicas":3}}}'
- for TiKV
kubectl patch -n tidb-cluster TidbCluster basic --type merge --patch '{"spec":{"tikv":{"replicas":5}}}'kubectl patch -n tidb-cluster TidbCluster basic --type merge --patch '{"spec":{"tikv":{"replicas":3}}}'
- for TiDB
kubectl patch -n tidb-cluster TidbCluster basic --type merge --patch '{"spec":{"tidb":{"replicas":5}}}'kubectl patch -n tidb-cluster TidbCluster basic --type merge --patch '{"spec":{"tidb":{"replicas":3}}}'
Horizontal Scaling of TiFlash
- please refer to docs of TiDB
Horizontal Scaling of TiCDC
- please refer to docs of TiDB