diff options
Diffstat (limited to 'usr.sbin/ctladm/ctladm.8')
| -rw-r--r-- | usr.sbin/ctladm/ctladm.8 | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/usr.sbin/ctladm/ctladm.8 b/usr.sbin/ctladm/ctladm.8 index 5be1ba1..d8b0ae0 100644 --- a/usr.sbin/ctladm/ctladm.8 +++ b/usr.sbin/ctladm/ctladm.8 @@ -35,7 +35,7 @@ .\" $Id: //depot/users/kenm/FreeBSD-test2/usr.sbin/ctladm/ctladm.8#3 $ .\" $FreeBSD$ .\" -.Dd December 21, 2016 +.Dd January 23, 2017 .Dt CTLADM 8 .Os .Sh NAME @@ -941,6 +941,14 @@ Specifies file or device name to use for backing store. .It Va num_threads Specifies number of backend threads to use for this LUN. .El +.Pp +Options specific for ramdisk backend: +.Bl -tag -width 12n +.It Va capacity +Specifies capacity of backing store (maximum RAM for data). +The default value is zero, that disables backing store completely, +making all writes go to nowhere, while all reads return zeroes. +.El .Sh EXAMPLES .Dl ctladm tur 1 .Pp @@ -977,7 +985,14 @@ starting at LBA 0xff432140. Create a LUN with the .Dq fake ramdisk as a backing store. -The LUN will claim to have a size of approximately 10 terabytes. +The LUN will claim to have a size of approximately 10 terabytes, +while having no real data store (all written data are lost). +.Pp +.Dl ctladm create -b ramdisk -s 10T -o capacity=10G +.Pp +Create a thin provisioned LUN with a ramdisk as a backing store. +The LUN will have maximal backing store capacity of 10 gigabytes, +while reporting size of 10 terabytes, .Pp .Dl ctladm create -b block -o file=src/usr.sbin/ctladm/ctladm.8 .Pp |
