1 / 4

Master-Election Algorithm for OES 11 and Earlier

Master-Election Algorithm for OES 11 and Earlier. NIC working?. No. Start master election. Yes. IP addresses of all cluster nodes. Higher IP addresses?. IP addresses of remaining nodes. Promote self as a master candidate. No. Yes. Ask node with highest IP address to be the master.

wray
Download Presentation

Master-Election Algorithm for OES 11 and Earlier

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Master-Election Algorithm for OES 11 and Earlier NIC working? No Start master election Yes IP addresses of all cluster nodes Higher IP addresses? IP addresses of remaining nodes Promote self as a master candidate No Yes Ask node with highest IP address to be the master Multiple masters? Remove IP address of the non-responsive node Master heartbeat? No No Yes Yes SBD Tiebreaker Old master? Yes Master No Highest IP address? SBD fences the master candidate and nodes in its group Yes No

  2. New Master-Election Algorithm for OES 11 SP1 NIC working? No Start master election Yes IP addresses of all cluster nodes Ping all cluster nodes Higher IP addresses? IP addresses of responsive cluster nodes Promote self as a master candidate No Yes Remove IP addresses of cluster nodes that did not ping or reply to ping Ask node with highest IP address to be the master Multiple masters? Remove IP address of the non-responsive node Master heartbeat? No No Yes Yes SBD Tiebreaker Old master? Yes Master No Highest IP address? SBD fences the master candidate and nodes in its group Yes No

  3. Master-Election Algorithm for OES 11 and Earlier NIC working? No Start master election Yes IP addresses of all cluster nodes Higher IP addresses? IP addresses of remaining nodes Promote self as a master candidate No Yes Ask node with highest IP address to be the master Multiple masters? Remove IP address of the non-responsive node Master heartbeat? No No Yes Yes Fence the losing master candidate and nodes in its group Loser SBD Winner Master

  4. New Master-Election Algorithm for OES 11 SP1 NIC working? No Start master election Yes IP addresses of all cluster nodes Ping all cluster nodes Higher IP addresses? IP addresses of responsive cluster nodes Promote self as a master candidate No Yes Remove IP addresses of cluster nodes that did not ping or reply to ping Ask node with highest IP address to be the master Multiple masters? Remove IP address of the non-responsive node Master heartbeat? No No Yes Yes Fence the losing master candidate and nodes in its group Loser SBD Winner Master

More Related