From 7c061b438673833744dc9c3db70ed82d1d5c00db Mon Sep 17 00:00:00 2001 From: Sugar Labs BOFH Date: Sun, 17 May 2015 01:35:25 -0400 Subject: [PATCH] Introduce the notion of weekly and monthly snapshots. By default, we keep 6 daily, 4 weekly and 3 monthly snapshots. Should save a ton of space with most workloads while preserving more history. --- wizbackup | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/wizbackup b/wizbackup index d96ee40..c88cc7e 100755 --- a/wizbackup +++ b/wizbackup @@ -4,7 +4,7 @@ # Based on incremental-backup 0.1 by Matteo Mattei # # Copyright 2006 Matteo Mattei -# Copyright 2007, 2008, 2009, 2010, 2011 Bernie Innocenti +# Copyright 2007, 2008, 2009, 2010, 2011, 2015 Bernie Innocenti # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -42,14 +42,19 @@ DEST=$1; shift # NOTE: --inplace will clobber linked files in older snapshots. DON'T USE IT! RSYNC_OPTS="-HAXa --stats --timeout 1800 --numeric-ids --delete --delete-excluded --ignore-errors $@" -# Number of saved snapshots -SNAPSHOTS=45 +# Number of months to keep +MONTHS=3 # Abort backup if the destination volume has less than these GBs free MIN_FREE_GB=10 RESULT=500 -DATE=`date +"%Y%m%d"` +DATE=$(date +"%Y%m%d") +if [ $(date +"%d") = 1 ]; then + DATE="$DATE-monthly" +elif [ $(date +"%w") = 0 ]; then + DATE="$DATE-weekly" +fi DEST="`echo $DEST | sed -e 's/\/$//'`" @@ -104,15 +109,17 @@ do_init() { } do_prune() { - local old="`ls | grep -v tmp | head -n -$SNAPSHOTS`" - if [ ! -z "$old" ]; then + local num_snapshots="$1" + local suffix="$2" + local oldest="$(ls -d [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$suffix | head -n -$num_snapshots)" + for old in $oldest; do echo "$(date): Removing oldest snapshot(s): $old..." rm -rf "$old" || exit 669 - fi + done } do_link() { - local newest=`ls | grep -v tmp | tail -n 1` + local newest=`ls -d [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]* | tail -n 1` if [ -d "$DEST/tmp" ]; then echo "$(date): Continuing with pre-existing snapshot $DEST/tmp" elif [ -z "$newest" ]; then @@ -164,7 +171,9 @@ if (( `id -u` != 0 )); then { echo "Sorry, must be root. Exiting..."; exit; } f echo "$(date): BEGIN backup: $SRC -> $DEST" echo "$(date): $0 $SRC $DEST $@" do_init -do_prune +do_prune 6 "" +do_prune 4 "-weekly" +do_prune $MONTHS "-monthly" do_test do_link do_backup -- 2.25.1