Editing Tmpfs (section)

=== SunOS ===
[[SunOS]] 4 includes what is most likely the earliest implementation of tmpfs; it first appeared in SunOS 4.0 in late 1987, together with new orthogonal address space management that allowed any object to be memory mapped.<ref>{{cite web
  | url = http://wiki.deimos.fr/images/1/1e/Solaris_tmpfs.pdf
  | title = tmpfs: A Virtual Memory File System
  | access-date = 2007-05-07
  | author = Peter Snyder
  }}</ref><ref>{{cite web
  | url = http://www.sun3arc.org/papers/Perf/SunOS_4.1_performance_tuning.ps.gz
  | title = SunOS 4.1 Performance Tuning
  | access-date = 2007-05-07
  | author = Hal L. Stern
  | format = [[GZip]]ped PostScript
  | archive-date = 2012-02-07
  | archive-url = https://web.archive.org/web/20120207050201/http://www.sun3arc.org/papers/Perf/SunOS_4.1_performance_tuning.ps.gz
  | url-status = dead
  }}</ref>

The [[Solaris (operating system)|Solaris]] {{mono|/tmp}} directory was made a tmpfs file system by default starting with Solaris 2.1,<ref>{{cite web
  |title=SPARC: Installing Solaris Software |url=http://www.bitsavers.org/pdf/sun/solaris/2.5/802-1959-10_Solaris_2.5_SPARC_Installing_Solaris_Software_Nov95.pdf
  |publisher=SunSoft
  |pages=9
  |date=December 1992
  |access-date=April 23, 2019
}}</ref> released in December 1992.<ref>{{cite web |url=http://www.operating-system.org/betriebssystem/_english/bs-solaris.htm |title=Solaris Operating System (Unix) |work=operating-system.org }}</ref> Output for the Solaris {{mono|df}} command will show ''swap'' as the background storage for any tmpfs volume:

 # df -k
 Filesystem  kbytes  used   avail capacity  Mounted on
 swap        601592     0  601592     0%    /tmp/test