From: Haomai Wang <haomai@xsky.com>
Date: Sun, 17 Jan 2016 16:57:32 +0000 (+0800)
Subject: RocksDB: add block cache size option to RocksDB
X-Git-Tag: v10.0.4~81^2~10
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=bb5d9095c105a6d67dc069c87546d8e603176d39;p=ceph.git

RocksDB: add block cache size option to RocksDB

Signed-off-by: Haomai Wang <haomai@xsky.com>
---

diff --git a/src/common/config_opts.h b/src/common/config_opts.h
index 89d697f6dd76..95c1cf9650a8 100644
--- a/src/common/config_opts.h
+++ b/src/common/config_opts.h
@@ -793,6 +793,8 @@ OPTION(kinetic_use_ssl, OPT_BOOL, false) // whether to secure kinetic traffic wi
 OPTION(rocksdb_separate_wal_dir, OPT_BOOL, false) // use $path.wal for wal
 OPTION(rocksdb_db_paths, OPT_STR, "")   // path,size( path,size)*
 OPTION(rocksdb_log_to_ceph_log, OPT_BOOL, true)  // log to ceph log
+OPTION(rocksdb_cache_size, OPT_INT, 128*1024*1024)  // default leveldb cache size
+OPTION(rocksdb_block_size, OPT_INT, 4*1024)  // default rocksdb block size
 // rocksdb options that will be used for omap(if omap_backend is rocksdb)
 OPTION(filestore_rocksdb_options, OPT_STR, "")
 // rocksdb options that will be used in monstore
diff --git a/src/kv/RocksDBStore.cc b/src/kv/RocksDBStore.cc
index 649daf7775de..672feada22a1 100644
--- a/src/kv/RocksDBStore.cc
+++ b/src/kv/RocksDBStore.cc
@@ -218,6 +218,14 @@ int RocksDBStore::do_open(ostream &out, bool create_if_missing)
     opt.env = static_cast<rocksdb::Env*>(priv);
   }
 
+  auto cache = rocksdb::NewLRUCache(g_conf->rocksdb_cache_size);
+  rocksdb::BlockBasedTableOptions bbt_opts;
+  bbt_opts.block_size = 32 * 1024;
+  bbt_opts.block_cache = cache;
+  opt.table_factory.reset(rocksdb::NewBlockBasedTableFactory(bbt_opts));
+  dout(10) << __func__ << " set block size to " << g_conf->rocksdb_block_size
+           << " cache size to " << g_conf->rocksdb_cache_size << dendl;
+
   status = rocksdb::DB::Open(opt, path, &db);
   if (!status.ok()) {
     derr << status.ToString() << dendl;