Index for Section 8

Alphabetical listing for V

Bottom of page

voliod(8)
NAME
  voliod - Starts, stops, and reports on Logical Storage Manager kernel I/O
  daemons

SYNOPSIS
  /sbin/voliod

  /sbin/voliod [-f] set count

OPTIONS
  -f  Force the kill of the last I/O daemon. Without this option, the I/O
      daemons can only be reduced to one.

KEYWORDS
  set count
      Sets the number of daemons to count.

DESCRIPTION
  The voliod utility starts, stops, or reports on Logical Storage Manager
  kernel I/O daemons.

    ·  When invoked with no arguments, voliod prints the current number of
       volume I/O daemons on the standard output.

    ·  When invoked with the set keyword, creates the number of daemons
       specified by count. If more volume I/O daemons exist than are
       specified by count, then the excess daemons will be terminated. If
       more than the maximum number (64) are specified, the specified number
       will be silently limited to that maximum.

  The number of daemons necessary for general I/O handling depends on system
  load and usage. One daemon for each CPU on the system (or a minimum of two)
  is generally adequate, unless volume recovery seems unusually slow.

  Each I/O daemon starts in the background, creates an asynchronously running
  kernel thread, and becomes a volume I/O daemon. The voliod utility does not
  wait for these threads to complete.

NOTES
  Logical Storage Manager (LSM) automatically sets the number of I/O daemons
  when the system starts, so it is usually not necessary to set or change the
  number of I/O daemons with this command.

  LSM I/O daemons cannot be stopped directly through the use of signals.

  The number of Logical Storage Manager I/O daemons currently running can be
  determined only by running voliod; I/O daemons do not appear in the list of
  processes produced by the ps(1) command.

EXIT CODES
  The voliod utility displays a diagnostic on the standard error and exits if
  an error is encountered. If an I/O error occurs within a spawned I/O daemon
  thread, then the I/O is not reflected in the exit status for voliod.
  Otherwise, voliod returns a nonzero exit status on errors, as follows:

  1	  Usage errors.	 voliod displays a usage message.

  2	  The requested number of daemons cannot be started, and voliod
	  reports the number that were successfully started.

  3	  All other errors.

FILES
  /dev/voliod
      The device used to start and report on volume I/O daemon kernel
      threads.

SEE ALSO
  Commands: vold(8), voldctl(8)

  Functions: fork(2), pthread(3)

  Other: volintro(8)

Index for Section 8

Alphabetical listing for V

Top of page