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https://issues.apache.org/jira/browse/HDFS-16978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17712017#comment-17712017
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ASF GitHub Bot commented on HDFS-16978:
---------------------------------------
virajjasani commented on code in PR #5554:
URL: https://github.com/apache/hadoop/pull/5554#discussion_r1165913930
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/tools/federation/RouterAdmin.java:
##########
@@ -140,7 +143,7 @@ private void printUsage(String cmd) {
private String getUsage(String cmd) {
if (cmd == null) {
String[] commands =
- {"-add", "-update", "-rm", "-ls", "-getDestination", "-setQuota",
+ {"-add", "-addall", "-update", "-rm", "-ls", "-getDestination",
"-setQuota",
Review Comment:
I think it sort of breaks compatibility for `-add` no? also, by keeping
separate command like `-addall`, we are able to clearly express that we can add
more mount points with it, so it is better and clean separation?
> RBF: New Router 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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