Commits on Sep 14, 2020

1. kvserver: observe lease transfer interval in considerRebalance …

   This commit plumbs the lease transfer rate limit into the lease transfer which
   occurs as a part of rebalancing decision making. The decision about whether a
   node should remove itself for the purpose of rebalancing happens at a much
   higher rate than the the actual rebalancing. This can lead to massive
   oscillations of leaseholders as the calculation on which replica should be
   removed in the face of node addition changes dramatically. We utilize
   a rate limit in lease transfer decisions to smooth this decision making
   elsewhere. This limit however is not utilized currently when deciding to
   transfer a lease for the purpose of rebalancing data. This change has
   shown very positive impact mitigating these lease transfer storms. See
   the commentary on cockroachdb#51867.
   
   Release note (bug fix): Made lease transfers during rebalancing adhere
   to the rate limit utilized in other lease transfer cases which eliminates
   unexpected lease oscillations when adding a new node.

   

   ajwerner committed Sep 14, 2020
   Copy the full SHA

   c719214 View commit details

   Browse the repository at this point in the history