repo: Remove packer limits

This commit simplifies finding a packer: The first open packer is taken,
and the upper limit for the pack file is removed.

internal/repository/packer_manager.go

@@ -38,8 +38,6 @@ type packerManager struct {
 }
 
 const minPackSize = 4 * 1024 * 1024
-const maxPackSize = 16 * 1024 * 1024
-const maxPackers = 200
 
 // newPackerManager returns an new packer manager which writes temporary files
 // to a temporary directory
@@ -58,16 +56,10 @@ func (r *packerManager) findPacker(size uint) (packer *Packer, err error) {
 
 	// search for a suitable packer
 	if len(r.packers) > 0 {
-		debug.Log("searching packer for %d bytes\n", size)
-		for i, p := range r.packers {
-			if p.Packer.Size()+size < maxPackSize {
-				debug.Log("found packer %v", p)
-				// remove from list
-				r.packers = append(r.packers[:i], r.packers[i+1:]...)
+		p := r.packers[0]
+		r.packers = r.packers[1:]
 		return p, nil
 	}
-		}
-	}
 
 	// no suitable packer found, return new
 	debug.Log("create new pack for %d bytes", size)

internal/repository/packer_manager_test.go

@@ -91,7 +91,7 @@ func fillPacks(t testing.TB, rnd *randReader, be Saver, pm *packerManager, buf [
 		}
 		bytes += l
 
-		if packer.Size() < minPackSize && pm.countPacker() < maxPackers {
+		if packer.Size() < minPackSize {
 			pm.insertPacker(packer)
 			continue
 		}

internal/repository/repository.go

@@ -191,9 +191,8 @@ func (r *Repository) SaveAndEncrypt(ctx context.Context, t restic.BlobType, data
 		return restic.ID{}, err
 	}
 
-	// if the pack is not full enough and there are less than maxPackers
-	// packers, put back to the list
-	if packer.Size() < minPackSize && r.countPacker() < maxPackers {
+	// if the pack is not full enough, put back to the list
+	if packer.Size() < minPackSize {
 		debug.Log("pack is not full enough (%d bytes)", packer.Size())
 		r.insertPacker(packer)
 		return *id, nil