From cd17727ff9ca17466091519bc567a109b46944a4 Mon Sep 17 00:00:00 2001
From: Kevin Bataille <kbe@kev1.net>
Date: Sat, 25 Jul 2026 22:56:50 +0200
Subject: [PATCH] fix: make rclone sync more resilient to Scaleway throttling

Offsite sync hit 17 fatal IO errors deleting stale segment files after a
large one-off prune batch (from the recent log/-exclude change), and
rclone's default behavior is to bail immediately on delete errors rather
than retry. Lower concurrency (--transfers 8->4, --checkers 16->8) to
reduce rate-limit pressure, and make retries explicit (--retries 5,
--retries-sleep 10s, --low-level-retries 20) instead of relying on
defaults.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
---
 borg-backup.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/borg-backup.sh b/borg-backup.sh
index dad64af..478eb09 100755
--- a/borg-backup.sh
+++ b/borg-backup.sh
@@ -298,8 +298,11 @@ step "Step 6: Syncing to ${RCLONE_REMOTE}:${RCLONE_PATH}"
 run_cmd timeout "$SYNC_TIMEOUT" \
     rclone sync -v \
         --fast-list \
-        --transfers=8 \
-        --checkers=16 \
+        --transfers=4 \
+        --checkers=8 \
+        --retries 5 \
+        --retries-sleep 10s \
+        --low-level-retries 20 \
         --s3-no-check-bucket \
         --max-delete "$RCLONE_MAX_DELETE" \
         "$REPO" "${RCLONE_REMOTE}:${RCLONE_PATH}"