Problem
When NetBackup backups up a directory on the GPFS file system that contains a mix of resident, premigrated and migrated files, the data stream of the Migrated files are being recalled from tape to satisfy the backup. This causes the filesystem to fill up. Additional information:
GPFS is a DMAPI-enabled filesystem, and the migration state is stored within the DMAPI extended attributes.
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Cause
The existing design of bpbkar does not check the file attributes before opening the file for read.
Solution
Veritas Engineering has developed a bpbkar binary that reads the file attributes prior to recognize migrated files there by skipping those files during backup.
Binaries are available under the following etracks:
| NetBackup 8.1.2 | ET 3984936 |
| NetBackup 8.2 | ET 3987773 |
The following bp.conf file entries are available:
To skip the GPFS pre-migrated files, set the following:
SKIPPING_GPFS_PREMIGRATED_FILES = 1
To skip the GPFS migrated files, set the following:
SKIPPING_GPFS_MIGRATED_FILES = 1
This modification was made available in NetBackup 10.2.0.1 without an EEB.
Note: In addition to the EEBs and options mentioned above, GPFS 5.1.7 and later versions contain performance enhancements that benefit this feature of NetBackup.
References
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Please note that this document is a translation from English, and may have been machine-translated. It is possible that updates have been made to the original version after this document was translated and published. Veritas does not guarantee the accuracy regarding the completeness of the translation. You may also refer to the English Version of this knowledge base article for up-to-date information.