From 34ec103e2c55bd577505517906d4d48a80fc97cf Mon Sep 17 00:00:00 2001 From: Stelian Pop Date: Thu, 4 Sep 2008 19:21:07 +0000 Subject: [PATCH] The Tower of Hanoi example wasn't. --- CHANGES | 7 ++++++- dump/dump.8.in | 12 +++++++++--- 2 files changed, 15 insertions(+), 4 deletions(-) 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 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 -- 2.39.5