Power savings using dynamic storage cluster membership

摘要

A system for controlling power usage in a storage cluster by dynamically controlling membership in the storage cluster is disclosed. The storage cluster includes multiple storage servers that provide access to one or more storage subsystems. The power management system uses a power management policy to set parameters for controlling membership in the storage cluster and monitors the storage cluster based on the policy. Based on the monitoring, the system detects when the number of storage servers in the storage cluster should be reduced or increased. To reduce the number, the system selects a storage server to deactivate and directs the selected storage server to migrate storage resources (e.g., data, metadata) associated with the server to a different storage server. The system then deactivates the selected storage server by directing it to transition to a low power mode. The system may increase the number of servers in the storage cluster by reversing these steps.

主权项

1. A method for managing storage cluster membership, the method comprising:
accessing a power management policy for determining membership in a storage cluster, the storage cluster comprising a plurality of storage servers as members of the storage cluster, each member including a cluster interconnect adapter to communicate with other storage servers of the storage cluster, and a plurality of storage devices, wherein the plurality of storage servers manage access to the plurality of storage devices and each storage server of the plurality of storage servers can operate in a first mode and a second mode, such that power consumption of an individual storage server operating in the first mode differs from the power consumption of the individual storage server operating in the second mode; monitoring the storage cluster based on the power management policy; based on the monitoring, selecting a first storage server to transition from the first mode to the second mode; migrating resources between the selected first storage server and a second storage server in the plurality of storage servers via the respective cluster interconnect adapters of the selected first storage server and the second storage server; and transitioning the selected first storage server to the second mode.