Yuexin Zhang created HDFS-13764:
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Summary: [DOC] update flag is not necessary to avoid verifying
checksums
Key: HDFS-13764
URL: https://issues.apache.org/jira/browse/HDFS-13764
Project: Hadoop HDFS
Issue Type: Bug
Components: documentation
Affects Versions: 2.7.3
Reporter: Yuexin Zhang
We mentioned to use "-update" option to avoid checksum in the following doc:
[https://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-hdfs/TransparentEncryption.html#Copying_between_encrypted_and_unencrypted_locations]
{code:java}
// Copying between encrypted and unencrypted locations
By default, distcp compares checksums provided by the filesystem to verify that
the data was successfully copied to the destination. When copying between an
unencrypted and encrypted location, the filesystem checksums will not match
since the underlying block data is different. In this case, specify the
-skipcrccheck and -update distcp flags to avoid verifying checksums.
{code}
But actually, "-update" option is not necessary, only "-skipcrccheck" is needed.
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