From 7f65e92b8140a3c5fd9594b51979b7dad3324300 Mon Sep 17 00:00:00 2001
From: Minglei Jin <mljin@taosdata.com>
Date: Tue, 14 Nov 2023 19:27:18 +0800
Subject: [PATCH] tsdb/retention: not allow migrate backward

---
 source/dnode/vnode/src/tsdb/tsdbRetention.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/source/dnode/vnode/src/tsdb/tsdbRetention.c b/source/dnode/vnode/src/tsdb/tsdbRetention.c
index bc76377597..f6888ba9cb 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRetention.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRetention.c
@@ -359,6 +359,9 @@ static int32_t tsdbDoRetentionOnFileSet(SRTNer *rtner, STFileSet *fset) {
         s3EvictCache(fobj->fname, fsize * 2);
       }
       */
+      if (fobj->f->did.level > did.level) {
+        continue;
+      }
       tsdbInfo("file:%s size: %" PRId64 " do migrate from %d to %d", fobj->fname, fobj->f->size, fobj->f->did.level,
                did.level);