tree 878c6b5311400590fa92f84b9629154390298dac
parent f89e3fbb751fbef7012e695ed5873eade13ba4f5
author Ankit Jain <ankit.mcs@gmail.com> 1559348695 -0700
committer Charan Reddy Guttapalem <reddycharan18@gmail.com> 1559348695 -0700

Entries must be acknowledged by bookies in multiple fault domains before being acknowledged to client

Descriptions of the changes in this PR:

Bookkeeper write logic makes sure that there are at least ackQuorumSize
number of successful writes before sending ack back to the client. In
many cases these may fall into the same fault domain. A mechanism to
force bookkeeper to make sure that there are acks from at least
minNumRacksPerWriteQuorum number of fault domains and a configuration
to enforce this.

Signed-off-by: Ankit Jain <jain.asalesforce.com>

Master Issue: #2095 

Reviewers: Charan Reddy Guttapalem <reddycharan18@gmail.com>, Enrico Olivelli <eolivelli@gmail.com>

This closes #2096 from ankit-j/ankit-j/enforceFragmentMultipleFaultDomainWrite and squashes the following commits:

c90fd5a3d [Ankit Jain] Addressing review comments
07deae673 [Ankit Jain] Addressing @reddycharan's review comments
14164e291 [Ankit Jain] Fixed spacing error in bk_server.yaml
22c8b3c03 [Ankit Jain] Updated testing.
917ed1c45 [Ankit Jain] Move readLock.unlock to finally block
78e0cd501 [Ankit Jain] Modify test to not use default rack for bookies
ca0bc3b8b [Ankit Jain] Entries must be acknowledged by bookies in multiple fault domains before being acknowledged to client
d35aa22ad [Charan Reddy Guttapalem] Move common placementpolicy components to TopologyAwareEnsemblePlacementPolicy.