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ninode(5)							     ninode(5)

NAME
       ninode  -  maximum number of HFS file system open inodes that can be in
       memory

VALUES
   Failsafe
   Default
       The default value is computed at runtime and depends on the  amount  of
       physical	 memory	 on  the  system.  For small memory systems (less than
       1GB), the default is 4880.  For systems with more than 1GB  of  memory,
       the default is 8192, or 8K.

   Allowed values
       The  minimum  value allowed is 14.  The maximum value allowed is memory
       limited.

       Specify a positive integer value.

DESCRIPTION
       The tunable defines the number of slots in the HFS inode	 table.	  This
       number  limits  the number of open inodes that can be in memory for HFS
       file systems at any given time.	The inode table is  used  as  a	 cache
       memory.	 For  performance  reasons  the	 most  recent (number of) open
       inodes are kept in main memory.	The table is hashed.

       Each unique open file has an open inode associated with it.  Therefore,
       the larger the number of unique open files, the larger should be.

   Who Is Expected to Change This Tunable?
       This  tunable is only relevant on systems where there are HFS file sys‐
       tems mounted.  Note that the use of HFS file systems  is	 being	depre‐
       cated in HP-UX.

   Restrictions on Changing
       This  tunable is static.	 Any changes to the value of this tunable will
       require system reboot to take effect.

   When Should the Value of This Tunable Be Raised?
       This value of many need to be raised on	systems	 running  applications
       that expect large numbers of open files on HFS file systems.

   What are the Side Effects of Raising the Value?
       The  HFS	 inode	table  is statically allocated, therefore will consume
       more memory if the value of this tunable is raised.

   When Should the Value of This Tunable Be Lowered?
       The value of can be lowered on systems with small  or  no  mounted  HFS
       file systems, to reduce memory consumption.

   What are the Side Effects of Lowering the Value?
       The  number  of	open HFS inodes that can be kept in memory is bound to
       the new lower limit.

   What Other Tunable Values Should Be Changed at the Same Time?
       None.

WARNINGS
       All HP-UX kernel tunable parameters are release specific.  This parame‐
       ter  may	 be  removed or have its meaning changed in future releases of
       HP-UX.

       The tunable is relevant only on systems with HFS	 file  systems.	  Note
       that  the  use  of HFS file systems is being deprecated in HP-UX.  This
       and other HFS related tunable parameters may be removed from future HP-
       UX releases.

       Installation of optional kernel software, from HP or other vendors, may
       cause changes to tunable parameter values.   After  installation,  some
       tunable	parameters may no longer be at the default or recommended val‐
       ues.  For information about the effects of installation on tunable val‐
       ues, consult the documentation for the kernel software being installed.
       For  information	 about	optional  kernel  software  that  was  factory
       installed on your system, see at

AUTHOR
       was developed by HP.

SEE ALSO
       kctune(1M), sam(1M), gettune(2), settune(2).

			   Tunable Kernel Parameters		     ninode(5)

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