Migration of durable clients in a clustered publish/subscribe system
US10812578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2018 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Oct 14, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1006
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Migration of a durable client in a publish/subscribe system from a first server of a cluster to a second server of the cluster. The method comprises the second server receiving subscription information of the durable client; the second server establishing a message queue for the durable client; the second server sending a switch command to all active servers of the cluster; in response to the second server obtaining, from an active server, an acknowledgement of the switch command, the second server inserting a marker to the message queue indicating switching point of the active server; and in response to the second server obtaining, from the first server, a message indicating the first server flushed all messages prior to respective switching points for all active servers, connecting the durable client to the second server and transmitting messages thereto by the second server. As a result, the durable client is migrated from the first server to the second server without disrupting data traffic to uninvolved clients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.