Air Cleaner User Manual

policy. All mirrors are written in parallel but always read from the
first mirror if the first mirror is available.
Note: This option only applies to backups created on systems
running AIX 5.1 or later.
pr (Parallel Round Robin)
Specify this option to establish a parallel write round robin read.
This policy is similar to the parallel policy except an attempt is
made to spread the reads to the logical volume more evenly across
all mirrors
Note: This option only applies to backups created on systems
running AIX 5.1 or later.
Serialize IO?
Use this option to turns on or off serialization of overlapping IOs. If
serialization is turned on then overlapping IOs are not allowed on a block
range and only a single IO in a block range is processed at any one time.
Most applications like file systems and databases do serialization so
serialization should be turned off. The default for new logical volumes is
off. Valid options are “y” for on and “n” for off.
Note: This option only applies to backups created on systems running AIX
5.2 or later.
Maximum PVs
Specify the maximum number of physical volumes onto which the logical
volume can be placed. This value is useful in limiting the number of
physical volumes used when the Inter-policy is set to maximum.
The valid values for this option is directly impacted by the Big Enabled
Volume Group and Factor Size options. Please refer to your AIX
documentation to determine the maximum allowed PVs based on your
configuration choices.
Changing Filesystem Attributes
Selecting this option enables changes to the filesystem attributes for logical
volumes to contain filesystem data. This option does not appear when you install
from a power backup, because all filesystem data was backed up as raw logical
volumes, and changes to the filesystem attributes are overwritten during the
restoration of the data.
When you first select the option, the following screen is displayed:
11-16 IBM Tivoli Storage Manager for System Backup and Recovery: Installation and User’s Guide