*nix Documentation Project
·  Home
 +   man pages
·  Linux HOWTOs
·  FreeBSD Tips
·  *niX Forums

  man pages->HP-UX 11i man pages -> tunefstab (4)              


 tunefstab(4)                                                   tunefstab(4)

 NAME    [Toc]    [Back]
      tunefstab - VxFS file system tuning parameters table

 DESCRIPTION    [Toc]    [Back]
      The tunefstab file contains tuning parameters for VxFS file systems.
      tunefs sets the tuning parameters for mounted file systems by
      processing command line options or by reading parameters in the
      tunefstab file.

      Each entry in tunefstab is a line of fields in one of the following

           block-device           tunefs-options
           system-default         tunefs-options

      block-device is the name of the device on which the file system is
      mounted.  If there is more than one line that specifies options for a
      device, each line is processed and the options are set in order.

      In place of block-device, system-default specifies tunables for each
      device to process.  If there is an entry for both a block-device and
      system-default, the system-default value takes precedence.

      Lines in tunefstab that start with the pound (#) character are treated
      as comments and ignored.

      The tunefs-options correspond to the tunable parameters that vxtunefs
      and mount_vxfs set on the file system.  Each option in this list is a
      name=value pair. Separate the options by commas, with no spaces or
      tabs between the options and commas.

      See the vxtunefs(1M) manual page for a description of the supported

 EXAMPLES    [Toc]    [Back]
      If you have a four column striped volume, /dev/vx/dsk/datadb/db03,
      with a stripe unit size of 128 kilobytes per disk, set the
      read_pref_io and read_nstream parameters 128 and four, respectively.
      You can do this in two ways:

           /dev/vx/dsk/datadg/db03 read_pref_io=128k,read_nstream=4


           /dev/vx/dsk/datadg/db03 read_pref_io=128k
           /dev/vx/dsk/datadg/db03 read_nstream=4

      To set the discovered direct I/O size lower so that it is always lower
      than the default, add the following line to the /etc/vx/tunefstab

 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003

 tunefstab(4)                                                   tunefstab(4)

           /dev/dsk/c3t1d0 discovered_direct_iosz=128K

 FILES    [Toc]    [Back]
      /etc/vx/tunefstab             Default tunefstab file.

 SEE ALSO    [Toc]    [Back]
      mkfs_vxfs(1M), mount(1M), vxtunefs(1M).

      VERITAS File System Administrator's Guide.

 Hewlett-Packard Company            - 2 -   HP-UX 11i Version 2: August 2003
[ Back ]
 Similar pages
Name OS Title
vxfsconvert HP-UX convert a file system to a vxfs file system or upgrade a VxFS disk layout version.
lltune IRIX Sends/receives lapb or llc2 tuning parameters to/from their respective drivers.
pfs_fstab HP-UX static file system mounting table, mounted file systems table
fscat HP-UX cat a VxFS file system
fscat_vxfs HP-UX cat a VxFS file system
ff_vxfs HP-UX fast find: list file names and statistics for a VxFS file system
vxumount HP-UX unmount a VxFS file system
mkfs_vxfs HP-UX construct a VxFS file system
vxtunefs HP-UX tune a VxFS File System
fsdb_vxfs HP-UX VxFS file system debugger
Copyright © 2004-2005 DeniX Solutions SRL
newsletter delivery service