CDV ❯ Determine which L2 wins election more intelligently

• Type: New Feature
• Status: Open
• Priority: 2 Major
• Resolution:
• Component/s: DSO:L2,Failover
• Labels:

• Assignee: prodmgmt
• Reporter: ari
• Created: October 05, 2009
• Votes: 0
• Watchers: 0
• Updated:

  March 19, 2010
• Resolved:

Description

http://forums.terracotta.org/forums/posts/list/2567.page

Need a way to determine which L2 was active last…that should take weight at the election time. Maybe all L2’s that went down as an active report “I think I was active and my last transaction ID is XXX”. Then the one with the highest transaction ID wins? Make it a property for 3.2 that is disabled by default so that there are no risks in the community but eventually allow “l2.nha.autoRestorePreviousMaster=true” to be a default (of course, ignore my feature designing in JIRA…it is just to get the concept across in succinct fashion).

–Ari

Comments

Steve Harris 2009-10-05

Not sure if I totally understand why this is needed yet but… One way to achieve this would be to have each node store the timestamp of the last time he became active somewhere.