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make pruning of CRDT garbage work, #21647

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* fix merge issues of DataEnvelope and its pruning
* simplify by removing the tombstones, which didn't work in all cases anyway
* keep the PruningPerformed markers in the DataEnvelope until configured
  TTL has elapsed (wall clock)
* simplify PruningState structure
* also store the pruning markers in durable data
* collect removed nodes from the data, listing on MemberRemoved is not enough
* possibility to disable pruning altogether
* documented caveat for durable data
This commit is contained in:
Patrik Nordwall 2017-01-11 13:19:45 +01:00
parent c5d18c30d6
commit 952be31a7d
28 changed files with 951 additions and 229 deletions
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4
akka-distributed-data/src/test/scala/akka/cluster/ddata/PNCounterSpec.scala
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@ -143,16 +143,20 @@ class PNCounterSpec extends WordSpec with Matchers {
val c1 = PNCounter()
val c2 = c1 increment node1
val c3 = c2 decrement node2
c2.modifiedByNodes should ===(Set(node1))
c2.needPruningFrom(node1) should be(true)
c2.needPruningFrom(node2) should be(false)
c3.modifiedByNodes should ===(Set(node1, node2))
c3.needPruningFrom(node1) should be(true)
c3.needPruningFrom(node2) should be(true)
val c4 = c3.prune(node1, node2)
c4.modifiedByNodes should ===(Set(node2))
c4.needPruningFrom(node2) should be(true)
c4.needPruningFrom(node1) should be(false)
val c5 = (c4 increment node1).pruningCleanup(node1)
c5.modifiedByNodes should ===(Set(node2))
c5.needPruningFrom(node1) should be(false)
}