[GitHub] [pinot] saurabhd336 commented on a diff in pull request #11077: (WIP) Instance retag validation check api

["saurabhd336 (via GitHub)" <gi...@apache.org>]

saurabhd336 commented on code in PR #11077:
URL: https://github.com/apache/pinot/pull/11077#discussion_r1261988572


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pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java:
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@@ -4128,6 +4129,29 @@ public PeriodicTaskInvocationResponse invokeControllerPeriodicTask(String tableN
     return new PeriodicTaskInvocationResponse(periodicTaskRequestId, messageCount > 0);
   }
 
+  /**
+   * Construct a map of all the tenants and their respective minimum server requirements.
+   * The minimum server requirement is computed by iterating over all the tables of the tenant and
+   * find the table with maximum replication.
+   * @return map of tenants and their minimum server requirements
+   */
+  public Map<String, Integer> minimumServersRequiredForTenants() {
+    Map<String, Integer> tenantMinServerMap = new HashMap<>();
+    getAllServerTenantNames().forEach(tenant -> tenantMinServerMap.put(tenant, 0));
+    for (String table : getAllTables()) {
+      TableConfig tableConfig = getTableConfig(table);

Review Comment:
   Could we fetch the tableConfigs all at once instead? We may pass list<TableConfigs> to this function



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