saurabhd336 commented on code in PR #11077:
URL: https://github.com/apache/pinot/pull/11077#discussion_r1263552337
##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java:
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@@ -4128,6 +4138,33 @@ public PeriodicTaskInvocationResponse
invokeControllerPeriodicTask(String tableN
return new PeriodicTaskInvocationResponse(periodicTaskRequestId,
messageCount > 0);
}
+ /**
+ * Construct a map of all the tags and their respective minimum instance
requirements.
+ * The minimum instance requirement is computed by
+ * - for BROKER tenant tag set it to 1.
+ * - for SERVER tenant tag iterate over all the tables of that tenant and
find the maximum table replication.
+ * - for rest of the tags just set it to 0
+ * @return map of tags and their minimum instance requirements
+ */
+ public Map<String, Integer> minimumInstancesRequiredForTags() {
+ Map<String, Integer> tagMinServerMap = new HashMap<>();
+ for (InstanceConfig instanceConfig : getAllHelixInstanceConfigs()) {
+ for (String tag : instanceConfig.getTags()) {
+ tagMinServerMap.put(tag, TagNameUtils.isBrokerTag(tag) ? 1 : 0);
+ }
+ }
+ for (TableConfig tableConfig : getAllTableConfigs()) {
+ String serverTag =
TagNameUtils.getServerTagForTenant(tableConfig.getTenantConfig().getServer(),
+ tableConfig.getTableType());
+ int maxReplication =
Math.max(Objects.requireNonNullElse(tagMinServerMap.get(serverTag), 0),
+ tableConfig.getReplication());
+ tagMinServerMap.put(serverTag, maxReplication);
Review Comment:
Can be replaced with
``tagMinServerMap.put(serverTag,
Math.max(tagMinServerMap.getOrDefault(serverTag, 0),
tableConfig.getReplication()) )```
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