reddycharan commented on a change in pull request #1397: Bookies should be from
different racks in a Writequorum.
URL: https://github.com/apache/bookkeeper/pull/1397#discussion_r188794529
##########
File path:
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/RackawareEnsemblePlacementPolicyImpl.java
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@@ -542,9 +544,58 @@ public void
handleBookiesThatJoined(Set<BookieSocketAddress> joinedBookies) {
curRack = localNode.getNetworkLocation();
}
} else {
- curRack = "~" + prevNode.getNetworkLocation();
+ StringBuilder sb = new StringBuilder();
+ sb.append("~");
+
+ if (writeQuorumSize > 1) {
+ /*
+ * Ideally RackAwareEnsemblePlacementPolicy should try
+ * to select bookies from different racks for a write
+ * quorum. So in a WriteQuorum, bookies should be from
+ * WriteQuorum number of racks. So we would add racks
of
+ * (WriteQuorumSize-1) neighbours (both sides) to the
+ * exclusion list (~curRack).
+ */
+ for (int j = 1; j < writeQuorumSize; j++) {
Review comment:
changed logic to honor minNumRacksPerWriteQuorum config value.
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