US 10,503,621 B2 · Manager election for erasure coding groups

Abstract

To ensure that there is an elected manager among storage nodes of an erasure coding group (“ECG”), an ECG manager (“ECGM”) election process is periodically performed among available storage nodes that are configured with the software to perform the services of an ECGM. When a storage node is activated, an ECGM process of the storage node begins executing and is assigned a process identifier (“PID”). A storage node can utilize a service query framework to identify other available storage nodes and retrieve their ECGM PIDs. The storage node then selects a PID according to a criterion and elects the storage node corresponding to the selected PID to be the acting ECGM. This process is performed periodically, so even if the acting ECGM storage node fails, a new ECGM is eventually selected from the available storage nodes.

Claims20

Dependent claims

A method comprising:

retrieving, by a first storage node in a set of storage nodes, first identifiers which correspond to a process executing on each storage node in the set of storage nodes, wherein the process is for managing data storage among the set of storage nodes;
selecting a first identifier of the first identifiers based, at least in part, on a first criterion;
determining whether the first identifier matches an identifier corresponding to the process on the first storage node;
based on determining that the first identifier matches the identifier corresponding to the process on the first storage node, managing, by the first storage node, data storage among the set of storage nodes;
and
based on determining that the first identifier does not match an identifier corresponding to the process on the first storage node,
determining, by the first storage node, a second storage node of the set of storage nodes to be an acting manager for the set of storage nodes;
and
directing, by the first storage node, data storage management requests to the second storage node.

6 more elements

A first storage node comprising:

a processor;
and
a non-transitory machine-readable storage medium having program code executable by the processor to cause the first storage node to,
retrieve first identifiers which correspond to a process executing on each storage node in a set of storage nodes, wherein the process is for managing data storage among the set of storage nodes, wherein the set of storage nodes comprises the first storage node;
select a first identifier of the first identifiers based, at least in part, on a first criterion;
determine whether the first identifier matches an identifier corresponding to the process on the first storage node;
based on a determination that the first identifier matches the identifier corresponding to the process on the first storage node, begin managing data storage among the set of storage nodes;
and
based on a determination that the first identifier does not match an identifier corresponding to the process on the first storage node,
determining a second storage node of the set of storage nodes to be an acting manager for the set of storage nodes;
and
directing data storage management requests to the second storage node.

9 more elements

Dependencies are inferred from the claim text.

Manager election for erasure coding groups

Life of this patent

Manager election for erasure coding groups

Life of this patent

Abstract

Claims20