From: Jianjian Huo <jianjian.huo@ssi.samsung.com>
Date: Mon, 4 Apr 2016 21:50:19 +0000 (-0700)
Subject: os/bluestore/BlueStore: cleanup the wal entries using single delete
X-Git-Tag: v11.0.0~826^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=dc17107d818ecbbbda4affa9d90a3cb2755f04fa;p=ceph.git

os/bluestore/BlueStore: cleanup the wal entries using single delete

By use of single delete, RocksDB should be able to remove deleted wal
entries with only one compaction in theory, when wal entries land on level0.
This should reduce bluestore wal entries incurred WAF.

Signed-off-by: Jianjian Huo <jianjian.huo@ssi.samsung.com>
---

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 33750ed055a2..08b0d7799e53 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -3993,7 +3993,7 @@ void BlueStore::_kv_sync_thread()
 	// cleanup the wal
 	string key;
 	get_wal_key(wt.seq, &key);
-	t->rmkey(PREFIX_WAL, key);
+	t->rm_single_key(PREFIX_WAL, key);
       }
       db->submit_transaction_sync(t);