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btrbk: fixed scheduling (correctly calculate delta-weeks); cleanup

pull/30/head
Axel Burri 2015-01-25 18:05:52 +01:00
parent e76ad88d65
commit 93ece28ee6
1 changed files with 31 additions and 55 deletions
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@ -837,7 +837,7 @@ sub get_latest_common($$$)
}
sub check_backup_scheme(@)
sub schedule_deletion(@)
{
my %args = @_;
my $schedule = $args{schedule} || die;
@ -847,78 +847,54 @@ sub check_backup_scheme(@)
my $preserve_weekly = $args{preserve_weekly} // die;
my $preserve_monthly = $args{preserve_monthly} // die;
my $delta_dow = $day_of_week_map{$preserve_day_of_week} - Day_of_Week(@today);
$delta_dow = $delta_dow + 7 if($delta_dow < 0);
INFO "Filter scheme: preserving all within $preserve_daily days";
INFO "Filter scheme: preserving first in week (starting on $preserve_day_of_week), for $preserve_weekly weeks";
INFO "Filter scheme: preserving last weekly of month, for $preserve_monthly months";
DEBUG "next $preserve_day_of_week is in $delta_dow days";
my %first_in_delta_weeks;
my $oldest_daily;
foreach my $href (sort { $a->{sort} cmp $b->{sort} } @$schedule)
# first, do our calendar calculations
# note: our week starts on $preserve_day_of_week
my $delta_days_to_eow_from_today = $day_of_week_map{$preserve_day_of_week} - Day_of_Week(@today) - 1;
$delta_days_to_eow_from_today = $delta_days_to_eow_from_today + 7 if($delta_days_to_eow_from_today < 0);
DEBUG "last day before next $preserve_day_of_week is in $delta_days_to_eow_from_today days";
foreach my $href (@$schedule)
{
my @date = @{$href->{date}};
my $delta_days = Delta_Days(@date, @today);
if(($preserve_daily eq "all") || ($delta_days <= $preserve_daily)) {
$href->{preserve} ||= "preserved daily: $delta_days days ago";
}
my $delta_days_to_eow = $delta_days + $delta_days_to_eow_from_today;
{
use integer; # do integer arithmetics
# note: our week starts on $preserve_day_of_week
my $delta_days_next_end_of_week = $delta_days + $delta_dow - 1;
my $delta_weeks = $delta_days_next_end_of_week / 7;
my $err_days = 6 - $delta_days_next_end_of_week % 7;
$href->{delta_days} = $delta_days;
$href->{delta_weeks} = $delta_weeks;
$href->{err_days} = $err_days;
$first_in_delta_weeks{$delta_weeks} //= $href;
unless($oldest_daily) {
# keep the oldest daily
if(($preserve_weekly eq "all") || ($delta_weeks <= $preserve_weekly)) {
$href->{preserve} ||= "preserved weekly: oldest daily backup: " . ($href->{err_days} ? "$href->{err_days} days after " : "") . "$preserve_day_of_week, not older than $preserve_weekly weeks";
$oldest_daily = $href;
}
}
$href->{delta_days} = $delta_days;
$href->{delta_weeks} = $delta_days_to_eow / 7;
$href->{err_days} = 6 - ( $delta_days_to_eow % 7 );
$href->{delta_months} = ($today[0] - $date[0]) * 12 + ($today[1] - $date[1]);
$href->{month} = "$date[0]-$date[1]";
}
}
my %last_in_delta_months;
my $oldest_weekly;
foreach (reverse sort keys %first_in_delta_weeks)
{
# filter daily, weekly, monthly
my %first_in_delta_weeks;
my %last_weekly_in_delta_months;
foreach my $href (sort { $a->{sort} cmp $b->{sort} } @$schedule) {
if($preserve_daily && (($preserve_daily eq "all") || ($href->{delta_days} <= $preserve_daily))) {
$href->{preserve} ||= "preserved daily: $href->{delta_days} days ago";
}
$first_in_delta_weeks{$href->{delta_weeks}} //= $href;
}
foreach (reverse sort keys %first_in_delta_weeks) {
my $href = $first_in_delta_weeks{$_} || die;
if(($preserve_weekly eq "all") || ($href->{delta_weeks} <= $preserve_weekly)) {
if($preserve_weekly && (($preserve_weekly eq "all") || ($href->{delta_weeks} <= $preserve_weekly))) {
$href->{preserve} ||= "preserved weekly: $href->{delta_weeks} weeks ago, " . ($href->{err_days} ? "+$href->{err_days} days after " : "on ") . "$preserve_day_of_week";
}
my @date = @{$href->{date}};
my $delta_months = ($today[0] - $date[0]) * 12 + ($today[1] - $date[1]);
$href->{delta_months} = $delta_months;
$href->{month} = "$date[0]-$date[1]";
# find last_in_month
$last_in_delta_months{$delta_months} = $href;
unless($oldest_weekly) {
if(($preserve_monthly eq "all") || ($delta_months <= $preserve_monthly)) {
# keep the oldest weekly
$href->{preserve} ||= "preserved monthly: oldest weekly backup: " . ($href->{err_days} ? "+$href->{err_days} days after " : "") . "$preserve_day_of_week (age: $delta_months months)";
}
$oldest_weekly = $href;
}
$last_weekly_in_delta_months{$href->{delta_months}} = $href;
}
# keep last weekly of month
foreach (reverse sort keys %last_in_delta_months)
{
my $href = $last_in_delta_months{$_} || die;
if(($preserve_monthly eq "all") || ($href->{delta_months} <= $preserve_monthly)) {
foreach (reverse sort keys %last_weekly_in_delta_months) {
my $href = $last_weekly_in_delta_months{$_} || die;
if($preserve_monthly && (($preserve_monthly eq "all") || ($href->{delta_months} <= $preserve_monthly))) {
$href->{preserve} ||= "preserved monthly: " . ($href->{err_days} ? "$href->{err_days} days after " : "") . "last $preserve_day_of_week of month $href->{month} (age: $href->{delta_months} months)";
}
}
# assemble results
my @delete;
foreach my $href (sort { $a->{sort} cmp $b->{sort} } @$schedule)
{
@ -1412,7 +1388,7 @@ MAIN:
push(@schedule, { name => "$droot/$vol", sort => $vol, date => [ $1, $2, $3 ] });
}
}
my @delete = check_backup_scheme(
my @delete = schedule_deletion(
schedule => \@schedule,
today => \@today,
preserve_day_of_week => config_key($config_target, "preserve_day_of_week"),
@ -1446,7 +1422,7 @@ MAIN:
push(@schedule, { name => "$sroot/$vol", sort => $vol, date => [ $1, $2, $3 ] });
}
}
my @delete = check_backup_scheme(
my @delete = schedule_deletion(
schedule => \@schedule,
today => \@today,
preserve_day_of_week => config_key($config_subvol, "preserve_day_of_week"),