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https://issues.apache.org/jira/browse/HDFS-16978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17720674#comment-17720674
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ASF GitHub Bot commented on HDFS-16978:
---------------------------------------
ayushtkn commented on code in PR #5554:
URL: https://github.com/apache/hadoop/pull/5554#discussion_r1187900806
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/tools/federation/RouterAdmin.java:
##########
@@ -462,6 +484,142 @@ public int run(String[] argv) throws Exception {
return exitCode;
}
+ /**
+ * Add all mount point entries provided in the request.
+ *
+ * @param parameters Parameters for the mount points.
+ * @param i Current index on the parameters array.
+ * @return True if adding all mount points was successful, False otherwise.
+ * @throws IOException If the RPC call to add the mount points fail.
+ */
+ private boolean addAllMount(String[] parameters, int i) throws IOException {
+ List<AddMountAttributes> addMountAttributesList = new ArrayList<>();
+ Set<String> mounts = new HashSet<>();
+ while (i < parameters.length) {
+ AddMountAttributes addMountAttributes =
getAddMountAttributes(parameters, i, true);
+ if (addMountAttributes == null) {
+ return false;
+ }
+ if (mounts.contains(addMountAttributes.getMount())) {
+ System.err.println("Multiple inputs for mount: " +
addMountAttributes.getMount());
+ return false;
+ }
+ mounts.add(addMountAttributes.getMount());
Review Comment:
HashSet add method returns false, if the entry was already there, contains
ain't required, unless I am missing something.
btw. earlier this was a success case for you, the later entry used to take
precedence. I tried it....
> RBF: Admin command to support bulk add of mount points
> ------------------------------------------------------
>
> Key: HDFS-16978
> URL: https://issues.apache.org/jira/browse/HDFS-16978
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Minor
> Labels: pull-request-available
>
> All state store implementations support adding multiple state store records
> using single putAll() implementation. We should provide new router admin API
> to support bulk addition of mount table entries that can utilize this build
> add implementation at state store level.
> For more than one mount point to be added, the goal of bulk addition should be
> # To reduce frequent router calls
> # To avoid frequent state store cache refreshers with each single mount
> point addition
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