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marco polo commented on ACCUMULO-4353: -------------------------------------- Are you attempting to design a mechanism that could be used to avoid re-balancing and have the master keep assignments where they were previously, knowing that servers will come back into operation? > Stabilize tablet assignment during transient failure > ---------------------------------------------------- > > Key: ACCUMULO-4353 > URL: https://issues.apache.org/jira/browse/ACCUMULO-4353 > Project: Accumulo > Issue Type: Improvement > Reporter: Shawn Walker > Assignee: Shawn Walker > Priority: Minor > Time Spent: 10m > Remaining Estimate: 0h > > When a tablet server dies, Accumulo attempts to reassign the tablets it was > hosting as quickly as possible to maintain availability. If multiple tablet > servers die in quick succession, such as from a rolling restart of the > Accumulo cluster or a network partition, this behavior can cause a storm of > reassignment and rebalancing, placing significant load on the master. > To avert such load, Accumulo should be capable of maintaining a steady tablet > assignment state in the face of transient tablet server loss. Instead of > reassigning tablets as quickly as possible, Accumulo should be await the > return of a temporarily downed tablet server (for some configurable duration) > before assigning its tablets to other tablet servers. -- This message was sent by Atlassian JIRA (v6.3.4#6332)