dongjoon-hyun commented on code in PR #45061:
URL: https://github.com/apache/spark/pull/45061#discussion_r1482182475


##########
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/KubernetesVolumeUtils.scala:
##########
@@ -105,4 +109,13 @@ private[spark] object KubernetesVolumeUtils {
       throw new NoSuchElementException(key + s" is required for $msg")
     }
   }
+
+  private def verifySize(size: Option[String]): Unit = {
+    size.foreach { v =>
+      if (v.forall(_.isDigit) && parseLong(v) < 1024) {
+        throw new IllegalArgumentException(
+          s"Volume size `$v` is smaller than 1KiB. Missing units?")
+      }
+    }

Review Comment:
   No~ In this case, this value is ignored. Instead, the created volume size is 
determined by underlying K8s configuration.
   
   For example, 8GiB in some K8s system. 



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