From: Stelian Pop <stelian@popies.net>
Date: Thu, 4 Sep 2008 19:21:07 +0000 (+0000)
Subject: The Tower of Hanoi example wasn't.
X-Git-Tag: release_0_4b42~7
X-Git-Url: https://git.wh0rd.org/?a=commitdiff_plain;h=34ec103e2c55bd577505517906d4d48a80fc97cf;p=dump.git

The Tower of Hanoi example wasn't.
---

diff --git a/CHANGES b/CHANGES
index ead4a44..c7adb0b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,4 @@
-$Id: CHANGES,v 1.294 2008/06/09 13:25:40 stelian Exp $
+$Id: CHANGES,v 1.295 2008/09/04 19:21:07 stelian Exp $
 
 Changes between versions 0.4b41 and 0.4b42 (released xxxxxxxxxxxxxxx)
 =====================================================================
@@ -50,6 +50,11 @@ Changes between versions 0.4b41 and 0.4b42 (released xxxxxxxxxxxxxxx)
 
 11.	Fix EA restoration in debug mode (Sourceforge bug #1986216).
 
+12.	Stefan Auracher <star7@onlinehome.de> noticed that the Tower
+	of Hanoi backup strategy documented in the man page wasn't
+	actually based on the Tower of Hanoi algorithm. The man page
+	was updated accordingly.
+
 Changes between versions 0.4b40 and 0.4b41 (released January 2, 2006)
 =====================================================================
 
diff --git a/dump/dump.8.in b/dump/dump.8.in
index 400eff2..ce6198c 100644
--- a/dump/dump.8.in
+++ b/dump/dump.8.in
@@ -26,7 +26,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$Id: dump.8.in,v 1.59 2006/08/01 10:22:44 stelian Exp $
+.\"	$Id: dump.8.in,v 1.60 2008/09/04 19:21:07 stelian Exp $
 .\"
 .TH DUMP 8 "version __VERSION__ of __DATE__" BSD "System management commands"
 .SH NAME
@@ -521,8 +521,8 @@ Always start with a level 0 backup, for example:
 This should be done at set intervals, say once a month or once every two months,
 and on a set of fresh tapes that is saved forever.
 .IP \(em
-After a level 0, dumps of active file systems are taken on a daily basis, using
-a modified Tower of Hanoi algorithm, with this sequence of dump levels:
+After a level 0, dumps of active file systems are taken on a daily basis,
+with this sequence of dump levels:
 .RS 14
 .B 3 2 5 4 7 6 9 8 9 9 ...
 .RE
@@ -535,6 +535,12 @@ set of tapes per dumped file system is used, also on a cyclical basis.
 After several months or so, the daily and weekly tapes should get rotated out
 of the dump cycle and fresh tapes brought in.
 .PP
+Another backup strategy is the Tower of Hanoi sequence, which reuses
+older tapes in a way that for newer dates the available restore points
+are more frequent, then for older dates (see
+http://en.wikipedia.org/wiki/Backup_rotation_scheme for additional
+information).
+.PP
 (The 4.3BSD option syntax is implemented for backward compatibility but is not
 documented here.)
 .SH ENVIRONMENT