Extending a Quick I/O File

Although Quick I/O files must be preallocated, they are not limited to the preallocated sizes. You can grow or "extend" a Quick I/O file by a specific amount or to a specific size, using options to the qiomkfile command. Extending Quick I/O files is a fast, online operation and offers a significant advantage over using raw devices.

Prerequisites

• You must have sufficient space on the file system to extend the Quick I/O file.

Options

Usage Notes

• You can also grow VxFS file systems online (provided the underlying disk or volume can be extended) using the fsadm command.

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  Note    You must have superuser (root) privileges to resize VxFS file systems using the fsadm command.

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• You can also use the VxDBA Monitoring Agent to monitor file system space and automatically grow file systems. See Managing Space Usage and the VxDBA Monitoring Agent for information on how to start and use the VxDBA Monitoring Agent, set space alarm thresholds, and automatically grow file systems.
• See the fsadm_vxfs(1M) and qiomkfile(1M) manual pages for more information.

  To extend a Quick I/O File

1. If required, ensure the underlying storage device is large enough to contain a larger VxFS file system (see the vxassist(1M) manual page for more information), and resize the VxFS file system using fsadm command:
               # /opt/VRTS/bin/fsadm -b newsize /mount_point

   where:

   • -b is the option for changing size
   • newsize is the new size of the file system in bytes, kilobytes, megabytes, blocks, or sectors
   • mount_point is the file system's mount point

2. Extend the Quick I/O file using the qiomkfile command:
      $ /opt/VRTS/bin/qiomkfile -e extend_amount /mount_point/filename

   or

   
      $ /opt/VRTS/bin/qiomkfile -r newsize /mount_point/filename

Example

• To grow VxFS file system /db01 to 500MB and extend the emp.dbf Quick I/O file by 20MB:

            # /opt/VRTS/bin/fsadm -b 500M /db01
   $ /opt/VRTS/bin/qiomkfile -e 20M /db01/emp.dbf
• To grow VxFS file system /db01 to 500MB and resize the emp.dbf Quick I/O file to 300MB:

            # /opt/VRTS/bin/fsadm -b 500M /db01
   $ /opt/VRTS/bin/qiomkfile -r 300M /db01/emp.dbf