Apache9 commented on code in PR #7174:
URL: https://github.com/apache/hbase/pull/7174#discussion_r2234000333
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hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java:
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@@ -460,13 +460,15 @@ static void rollingSplit(TableName tableName,
SplitAlgorithm splitAlgo, Configur
}
}
+ // Sort the ServerNames by the number of regions they have
+ final List<ServerName> serversLeft =
Lists.newArrayList(daughterRegions.keySet());
+ serversLeft.sort(Comparator.comparing(rsSizes::get));
+
// Round-robin through the ServerName list. Choose the
lightest-loaded servers
// first to keep the master from load-balancing regions as we
split.
- for (Map.Entry<ServerName,
- LinkedList<Pair<byte[], byte[]>>> daughterRegion :
daughterRegions.entrySet()) {
+ for (final ServerName rsLoc : serversLeft) {
Pair<byte[], byte[]> dr = null;
- ServerName rsLoc = daughterRegion.getKey();
- LinkedList<Pair<byte[], byte[]>> regionList =
daughterRegion.getValue();
+ final LinkedList<Pair<byte[], byte[]>> regionList =
daughterRegions.get(rsLoc);
Review Comment:
Is it possible to not use LinkedList here? Usually it does not benefit...
Can be a separated issue though.
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