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https://issues.apache.org/jira/browse/HDFS-14542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16856519#comment-16856519
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Jinglun commented on HDFS-14542:
--------------------------------
No matter the storage quota type is set or unset, *removing the redundant code
will save the check times by half*. That's why i say it's redundant.
If the storage quota type is not set, removing the redundant code will save *5
times* check.
If the storage quota type is set, the times depends on which storage type is
set.
There is benefits and no side-effect.
> Remove redundant code when verify quota
> ---------------------------------------
>
> Key: HDFS-14542
> URL: https://issues.apache.org/jira/browse/HDFS-14542
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 3.1.1
> Reporter: Jinglun
> Assignee: Jinglun
> Priority: Minor
> Attachments: HDFS-14542.patch
>
>
> DirectoryWithQuotaFeature.verifyQuotaByStorageType() does the job of
> verifying quota. It's redundant to call isQuotaByStorageTypeSet() because the
> for each iterator nextline has done the same job.
> {code:java}
> private void verifyQuotaByStorageType(EnumCounters<StorageType> typeDelta)
> throws QuotaByStorageTypeExceededException {
> if (!isQuotaByStorageTypeSet()) { // REDUNDANT.
> return;
> }
> for (StorageType t: StorageType.getTypesSupportingQuota()) {
> if (!isQuotaByStorageTypeSet(t)) { // CHECK FOR EACH STORAGETYPE.
> continue;
> }
> if (Quota.isViolated(quota.getTypeSpace(t), usage.getTypeSpace(t),
> typeDelta.get(t))) {
> throw new QuotaByStorageTypeExceededException(
> quota.getTypeSpace(t), usage.getTypeSpace(t) + typeDelta.get(t), t);
> }
> }
> }
> {code}
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