US 2017/0017680 A1Published application

Method for handling writes in database clusters with temporarily disjoint nodes

AssigneeCodership Oy

InventorsSeppo Jaakola, Teemu Ollakka, Alexey Yurchenko

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Abstract

A method for use in a multi-cluster database arrangement is provided. A given transaction is received at a given node of the multi-cluster database arrangement. A database object being modified by the given transaction is determined, whilst executing the given transaction at the given node. Subsequently, a given owner cluster assigned to the database object is determined. Next, it is determined whether or not the given node is included in a primary component of the given owner cluster. The given transaction is committed at the given node for the given owner cluster, when the given node is included in the primary component of the given owner cluster. The aforementioned method is performed when the given transaction is received during a time the given node is communicably disjoint from at least one other node of the given owner cluster.

Claims14

Dependent claims

A method for use in a multi-cluster database arrangement, the multi-cluster database arrangement comprising a plurality of database clusters, wherein at least two database clusters of the multi-cluster database arrangement are overlapping, wherein each database object defined in the multi-cluster database arrangement is assigned an owner cluster from amongst the plurality of database clusters, the method comprising:

(a) receiving a given transaction at a given node of the multi-cluster database arrangement;
(b) determining a database object being modified by the given transaction, whilst executing the given transaction at the given node;
(c) determining a given owner cluster assigned to the database object;
(d) determining whether or not the given node is included in a primary component of the given owner cluster;
and
(e) committing the given transaction at the given node for the given owner cluster, when the given node is included in the primary component of the given owner cluster,
further wherein (b) to (e) are performed when the given transaction is received at (a) during a time the given node is communicably disjoint from at least one other node of the given owner cluster.

4 more elements

A computing apparatus comprising:

a processor;
a memory coupled to the processor;
and
a network interface coupled to the processor,
wherein the processor is configured to:
(i) receive a given transaction;
(ii) determine a database object being modified by the given transaction, whilst executing the given transaction;
(iii) determine a given owner cluster assigned to the database object;
(iv) determine whether or not the computing apparatus is included in a primary component of the given owner cluster;
and
(v) commit the given transaction for the given owner cluster, when the computing apparatus is included in the primary component of the given owner cluster,
further wherein (ii) to (v) are performed when the given transaction is received at (i) during a time the computing apparatus is communicably disjoint from at least one other node of the given owner cluster.

9 more elements

Dependencies are inferred from the claim text.