Migrate NFS data
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PDFs
After planning the migration with the show and scan commands, you can migrate the NFS data.
Copy
The copy command scans and copies the entire source directory structure to a destination NFSv3 export. The copy command requires having source and destination paths as variables. The scanned and copied files, throughput/speed, and elapsed time details are displayed at the end of the copy operation.
Example:
xcp copy <source_nfs_export_path> <destination_nfs_export_path>
POSIX path example:
xcp copy -newid <id> file:///mnt/source file:///mnt/dest
Run xcp help copy for more details.
Resume
The resume command restarts a previously interrupted copy operation by specifying the catalog index name or number. The catalog index name or number of the previous copy operation is stored on the <catalog path>:/catalog/indexes directory.
Example:
xcp resume -id <catalog_name>
Run xcp help resume for more details.
Sync
The sync command scans for changes and modifications performed on a source NFS directory using a catalog index tag name or the number of a previous copy operation. Source incremental changes are copied and applied to the target directory. The old catalog index numbers are replaced with a new one after the sync operation.
Example:
xcp sync -id <catalog_name>
Run xcp help sync for more details.
Verify
The verify command uses a full byte-by-byte data comparison between source and target directories after the copy operation without using a catalog index number. The command checks for modification times and other file or directory attributes, including permissions. The command also reads the files on both sides and compares the data.
Example:
xcp verify <source_ip_address>:/source_vol <destination_ip_address>:/dest_vol
POSIX path example:
xcp verify file:///mnt/source file:///mnt/dest
Run xcp help verify for more details.
iSync
The isync command compares the source and destination and synchronizes the differences on the target without using the catalog index.
Example
xcp isync <source_ip_address>:/src <destination_ip_address>:/dest
You can use isync with the estimate option to estimate the time it takes for the isync command to synchronize the incremental changes. The -id parameter specifies the catalog name of a previous copy operation.
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If you change more than 25% of the data set size used, the isync estimate command might not show the expected results.
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Example
xcp isync estimate -id <name>
Run xcp help isync for more details.