J-HowHuang commented on code in PR #15175:
URL: https://github.com/apache/pinot/pull/15175#discussion_r1999798954
##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/DefaultRebalancePreChecker.java:
##########
@@ -184,4 +209,85 @@ private RebalancePreCheckerResult
checkIsMinimizeDataMovement(String rebalanceJo
return RebalancePreCheckerResult.error("Got exception when fetching
instance assignment, check manually");
}
}
+
+ private RebalancePreCheckerResult checkDiskUtilization(Map<String,
Map<String, String>> currentAssignment,
+ Map<String, Map<String, String>> targetAssignment,
+ TableSizeReader.TableSubTypeSizeDetails tableSubTypeSizeDetails, double
threshold, boolean worstCase) {
+ boolean isDiskUtilSafe = true;
+ StringBuilder message = new StringBuilder("UNSAFE. Servers with unsafe
disk util footprint: ");
+ String sep = "";
+ Map<String, Set<String>> existingServersToSegmentMap = new HashMap<>();
+ Map<String, Set<String>> newServersToSegmentMap = new HashMap<>();
+
+ for (Map.Entry<String, Map<String, String>> entrySet :
currentAssignment.entrySet()) {
+ for (String instanceName : entrySet.getValue().keySet()) {
+ existingServersToSegmentMap.computeIfAbsent(instanceName, k -> new
HashSet<>()).add(entrySet.getKey());
+ }
+ }
+
+ for (Map.Entry<String, Map<String, String>> entrySet :
targetAssignment.entrySet()) {
+ for (String instanceName : entrySet.getValue().keySet()) {
+ newServersToSegmentMap.computeIfAbsent(instanceName, k -> new
HashSet<>()).add(entrySet.getKey());
+ }
+ }
+
+ long avgSegmentSize = getAverageSegmentSize(tableSubTypeSizeDetails,
currentAssignment);
+
+ for (Map.Entry<String, Set<String>> entry :
newServersToSegmentMap.entrySet()) {
+ String server = entry.getKey();
+ DiskUsageInfo diskUsage = getDiskUsageInfoOfInstance(server);
+
+ if (diskUsage.getTotalSpaceBytes() < 0) {
+ return RebalancePreCheckerResult.warn(
+ "Disk usage info not enabled. Try later or set
controller.resource.utilization.checker.initial.delay to a"
Review Comment:
Should be "Disk usage hasn't been updated. Try later..."
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