[pve-devel] applied: [PATCH] pbs: prune: avoid getting all snapshots for group assembly if fixed anyway

[Thomas Lamprecht <t.lamprecht@proxmox.com>]

If both type and vmid is defined we don't need to list the current
snapshots, we simply can derive the single backup group from that and
let the PBS client handle the rest.

Should be a not so small speedup for most setups using PBS backup and
pruning configured on PVE side, as vzdump calls this separately for
every vmid on backup jobs with multiple guests included.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
 PVE/Storage/PBSPlugin.pm | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/PVE/Storage/PBSPlugin.pm b/PVE/Storage/PBSPlugin.pm
index 633c399..4320974 100644
--- a/PVE/Storage/PBSPlugin.pm
+++ b/PVE/Storage/PBSPlugin.pm
@@ -403,19 +403,25 @@ sub prune_backups {
 
     $logfunc //= sub { print "$_[1]\n" };
 
-    my $backups = eval { $class->list_volumes($storeid, $scfg, $vmid, ['backup']) };
-    die "failed to get list of all backups to prune - $@" if $@;
-
     $type = 'vm' if defined($type) && $type eq 'qemu';
     $type = 'ct' if defined($type) && $type eq 'lxc';
 
     my $backup_groups = {};
-    foreach my $backup (@{$backups}) {
-	(my $backup_type = $backup->{format}) =~ s/^pbs-//;
-	next if defined($type) && $backup_type ne $type;
 
-	my $backup_group = "$backup_type/$backup->{vmid}";
-	$backup_groups->{$backup_group} = 1;
+    if (defined($vmid) && defined($type)) {
+	# no need to get the list of volumes, we only got a single backup group anyway
+	$backup_groups->{"$type/$vmid"} = 1;
+    } else {
+	my $backups = eval { $class->list_volumes($storeid, $scfg, $vmid, ['backup']) };
+	die "failed to get list of all backups to prune - $@" if $@;
+
+	foreach my $backup (@{$backups}) {
+	    (my $backup_type = $backup->{format}) =~ s/^pbs-//;
+	    next if defined($type) && $backup_type ne $type;
+
+	    my $backup_group = "$backup_type/$backup->{vmid}";
+	    $backup_groups->{$backup_group} = 1;
+	}
     }
 
     my @param;
-- 
2.34.1