hyprlofs man page on SmartOS

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HYPRLOFS(7FS)							 HYPRLOFS(7FS)

NAME
       hyprlofs - fast name space virtual file system

SYNOPSIS
       #include <sys/fs/hyprlofs.h>

       mount (special, directory, MS_DATA, "hyprlofs", NULL, 0);

DESCRIPTION
       hyprlofs is a hybrid file system combining features from tmpfs(7FS) and
       lofs(7FS).  As with lofs, the hyprlofs file system allows new,  virtual
       file systems to be created which provide access to existing files using
       alternate pathnames.  In addition, the files themselves may have alter‐
       nate  names  and	 paths within the mount.  Unlike lofs, files cannot be
       created and backing files cannot be removed.  The name  space  is  com‐
       pletely managed through ioctls on the mount.  Entries in the name space
       are not mounts and thus, they will not appear in the mnttab.  The  file
       system  is  designed  to	 provide a very fast name space to the backing
       files.  The name space can be modified very quickly through  the	 ioctl
       interface.

       hyprlofs file systems can be mounted with the command:

	 mount -F hyprlofs swap directory

       The  name  space used by hyprlofs exists only in-memory so it will con‐
       sume a small amount of the system's virtual memory.   The  files	 them‐
       selves are backed by the original file as with lofs.

SEE ALSO
       df(1M), mount(1M), swap(1M), mount(2), umount(2)

       System Administration Guide: Basic Administration

DIAGNOSTICS
       df(1M)  output  is  of  limited	accuracy  since the space available to
       hyprlofs is dependent on the swap space demands of  the	entire	system
       and the files in the name space are not included.

				 March 7, 2012			 HYPRLOFS(7FS)
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