From 0ee9360f3e7b129f15d6c7eaee0aff7ad9688531 Mon Sep 17 00:00:00 2001
From: Michael Eischer <michael.eischer@fau.de>
Date: Sat, 29 Nov 2025 23:09:04 +0100
Subject: [PATCH] restore: reduce contention while writing files

---
 internal/restorer/filerestorer.go | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/internal/restorer/filerestorer.go b/internal/restorer/filerestorer.go
index 166bf1ff8..7b941de31 100644
--- a/internal/restorer/filerestorer.go
+++ b/internal/restorer/filerestorer.go
@@ -79,10 +79,12 @@ func newFileRestorer(dst string,
 	workerCount := int(connections)
 
 	return &fileRestorer{
-		idx:                  idx,
-		blobsLoader:          blobsLoader,
-		startWarmup:          startWarmup,
-		filesWriter:          newFilesWriter(workerCount, allowRecursiveDelete),
+		idx:         idx,
+		blobsLoader: blobsLoader,
+		startWarmup: startWarmup,
+		// use a large number of buckets to minimize bucket contention in filesWriter
+		// buckets are relatively cheap, so we can afford to have a lot of them
+		filesWriter:          newFilesWriter(1024, allowRecursiveDelete),
 		zeroChunk:            repository.ZeroChunk(),
 		sparse:               sparse,
 		progress:             progress,