From 8f7750b1ce127adbc2f11f0a66b2e1af7f40b2db Mon Sep 17 00:00:00 2001
From: Junpei Kawamoto <kawamoto.junpei@gmail.com>
Date: Fri, 22 Jan 2021 17:10:38 -0500
Subject: [PATCH 1/2] Use SerialBlobUploader if P = 1

---
 renter/renterutil/kv.go | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/renter/renterutil/kv.go b/renter/renterutil/kv.go
index b4666f4..fa9f449 100644
--- a/renter/renterutil/kv.go
+++ b/renter/renterutil/kv.go
@@ -32,11 +32,20 @@ func (kv PseudoKV) Put(ctx context.Context, key []byte, r io.Reader) error {
 	if err := kv.DB.AddBlob(b); err != nil {
 		return err
 	}
-	bu := ParallelBlobUploader{
-		U: kv.Uploader,
-		M: kv.M,
-		N: kv.N,
-		P: kv.P,
+	var bu BlobUploader
+	if kv.P == 1 {
+		bu = SerialBlobUploader{
+			U: kv.Uploader,
+			M: kv.M,
+			N: kv.N,
+		}
+	} else {
+		bu = ParallelBlobUploader{
+			U: kv.Uploader,
+			M: kv.M,
+			N: kv.N,
+			P: kv.P,
+		}
 	}
 	return bu.UploadBlob(ctx, kv.DB, b, r)
 }

From 12c5e496803c8008c21fabef07f92fbacd592443 Mon Sep 17 00:00:00 2001
From: Junpei Kawamoto <kawamoto.junpei@gmail.com>
Date: Fri, 22 Jan 2021 17:13:34 -0500
Subject: [PATCH 2/2] Use SerialBlobDownloader if P = 1

---
 renter/renterutil/kv.go | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/renter/renterutil/kv.go b/renter/renterutil/kv.go
index fa9f449..0132707 100644
--- a/renter/renterutil/kv.go
+++ b/renter/renterutil/kv.go
@@ -100,9 +100,16 @@ func (kv PseudoKV) GetRange(ctx context.Context, key []byte, w io.Writer, off, n
 	if err != nil {
 		return err
 	}
-	bd := ParallelBlobDownloader{
-		D: kv.Downloader,
-		P: kv.P,
+	var bd BlobDownloader
+	if kv.P == 1 {
+		bd = SerialBlobDownloader{
+			D: kv.Downloader,
+		}
+	} else {
+		bd = ParallelBlobDownloader{
+			D: kv.Downloader,
+			P: kv.P,
+		}
 	}
 	return bd.DownloadBlob(ctx, kv.DB, b, w, off, n)
 }