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new a4280d89f02 HBASE-29947 Improve CopyTable usage instructions for
copying between secure and non-secure clusters (#7829)
a4280d89f02 is described below
commit a4280d89f0212d06d5aaa9c08fe420a28e7e68ba
Author: Sreenivasulu <[email protected]>
AuthorDate: Thu Mar 26 14:56:14 2026 +0530
HBASE-29947 Improve CopyTable usage instructions for copying between secure
and non-secure clusters (#7829)
Signed-off-by: Nihal Jain <[email protected]>
Signed-off-by: Pankaj Kumar <[email protected]>
Reviewed-by: Vaibhav Joshi <[email protected]>
---
.../apache/hadoop/hbase/mapreduce/CopyTable.java | 32 ++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git
a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CopyTable.java
b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CopyTable.java
index 8a26972c481..a4a8b9a56bb 100644
---
a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CopyTable.java
+++
b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CopyTable.java
@@ -251,6 +251,38 @@ public class CopyTable extends Configured implements Tool {
System.err.println(" To copy data from 'sourceTableSnapshot' and bulk load
to 'destTable': ");
System.err.println(" $ hbase org.apache.hadoop.hbase.mapreduce.CopyTable "
+ "--new.name=destTable --snapshot --bulkload sourceTableSnapshot");
+ System.err.println();
+ System.err.println(
+ " To copy the data of 'TestTable' from the secured local cluster to a
non-secured peer"
+ + " cluster (cluster-b)");
+ System.err.println(" $ hbase org.apache.hadoop.hbase.mapreduce.CopyTable "
+ + "-Dhbase.mapred.output.hbase.security.authentication=simple "
+ +
"--peer.adr=cluster-b-1.example.com,cluster-b-2.example.com,cluster-b-3.example.com:"
+ + "2181:/cluster-b" + " TestTable");
+ System.err.println();
+ System.err.println(
+ " To copy the data of 'TestTable' from the local secured cluster to a
peer secured cluster "
+ + "in a different Kerberos realm.");
+ System.err.println(" Assume cluster-b uses a different Kerberos principal "
+ + "(cluster-b/[email protected]) for its master and regionserver.");
+ System.err.println(" $ hbase org.apache.hadoop.hbase.mapreduce.CopyTable "
+ + "-Dhbase.mapred.output.hbase.regionserver.kerberos.principal="
+ + "cluster-b/[email protected] "
+ +
"-Dhbase.mapred.output.hbase.master.kerberos.principal=cluster-b/[email protected]
"
+ +
"--peer.adr=cluster-b-1.example.com,cluster-b-2.example.com,cluster-b-3.example.com:"
+ + "2181:/cluster-b" + " TestTable");
+ System.err.println();
+ System.err.println(
+ " To copy the data of 'TestTable' from a non-secured local cluster to a
secured peer cluster"
+ + " (cluster-b)");
+ System.err.println(" $ hbase org.apache.hadoop.hbase.mapreduce.CopyTable "
+ + "-Dhbase.mapred.output.hbase.security.authentication=kerberos "
+ + "-Dhbase.mapred.output.hbase.regionserver.kerberos.principal="
+ + "cluster-b/[email protected] "
+ +
"-Dhbase.mapred.output.hbase.master.kerberos.principal=cluster-b/[email protected]
"
+ +
"--peer.adr=cluster-b-1.example.com,cluster-b-2.example.com,cluster-b-3.example.com:"
+ + "2181:/cluster-b" + " TestTable");
+ System.err.println();
System.err.println("For performance consider the following general
option:\n"
+ " It is recommended that you set the following to >=100. A higher
value uses more memory but\n"
+ " decreases the round trip time to the server and may increase
performance.\n"
