Module Name: src
Committed By: hannken
Date: Fri Nov 15 09:13:57 UTC 2013
Modified Files:
src/usr.sbin/fssconfig: fssconfig.8
Log Message:
Describe the differences between file system internal and external snapshots.
To generate a diff of this commit:
cvs rdiff -u -r1.10 -r1.11 src/usr.sbin/fssconfig/fssconfig.8
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/usr.sbin/fssconfig/fssconfig.8
diff -u src/usr.sbin/fssconfig/fssconfig.8:1.10 src/usr.sbin/fssconfig/fssconfig.8:1.11
--- src/usr.sbin/fssconfig/fssconfig.8:1.10 Tue Mar 5 23:01:06 2013
+++ src/usr.sbin/fssconfig/fssconfig.8 Fri Nov 15 09:13:57 2013
@@ -1,4 +1,4 @@
-.\" $NetBSD: fssconfig.8,v 1.10 2013/03/05 23:01:06 wiz Exp $ */
+.\" $NetBSD: fssconfig.8,v 1.11 2013/11/15 09:13:57 hannken Exp $ */
.\"
.\"
.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
@@ -28,7 +28,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd June 11, 2012
+.Dd November 15, 2013
.Dt FSSCONFIG 8
.Os
.Sh NAME
@@ -63,6 +63,10 @@ resides on the snapshotted file system a
This snapshot is active until
.Ar backup
is unlinked.
+Persistent snapshots save the file system as if it had been unmounted.
+Unlinked but open files get removed from the snapshot.
+The time to create a persistent snapshot increases with the size of the
+file system and decreases with the file system block size.
This snapshot mode is only supported for FFS file systems.
.Pp
Otherwise data written through the
@@ -80,6 +84,10 @@ Data is saved to
in units of
.Ar cluster
bytes.
+The snapshot is an image in time of the underlying block device.
+Unlinked but open files are still present on the snapshot.
+The time to create a snapshot is independent of the size of the
+file system or the file system block size.
.Pp
Options indicate an action to be performed:
.Bl -tag -width 3n
