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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/examples/rocksdb_backup_restore_example.cc | |
parent | Initial commit. (diff) | |
download | ceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rocksdb/examples/rocksdb_backup_restore_example.cc')
-rw-r--r-- | src/rocksdb/examples/rocksdb_backup_restore_example.cc | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/rocksdb/examples/rocksdb_backup_restore_example.cc b/src/rocksdb/examples/rocksdb_backup_restore_example.cc new file mode 100644 index 000000000..c833ed1c2 --- /dev/null +++ b/src/rocksdb/examples/rocksdb_backup_restore_example.cc @@ -0,0 +1,99 @@ +// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root directory). + +#include <cstdio> +#include <string> +#include <vector> + +#include "rocksdb/db.h" +#include "rocksdb/options.h" +#include "rocksdb/utilities/backup_engine.h" + +using ROCKSDB_NAMESPACE::BackupEngine; +using ROCKSDB_NAMESPACE::BackupEngineOptions; +using ROCKSDB_NAMESPACE::BackupEngineReadOnly; +using ROCKSDB_NAMESPACE::BackupInfo; +using ROCKSDB_NAMESPACE::DB; +using ROCKSDB_NAMESPACE::Env; +using ROCKSDB_NAMESPACE::Options; +using ROCKSDB_NAMESPACE::ReadOptions; +using ROCKSDB_NAMESPACE::Status; +using ROCKSDB_NAMESPACE::WriteOptions; + +#if defined(OS_WIN) +std::string kDBPath = "C:\\Windows\\TEMP\\rocksdb_example"; +#else +std::string kDBPath = "/tmp/rocksdb_example"; +#endif + +int main() { + DB* db; + Options options; + // Optimize RocksDB. This is the easiest way to get RocksDB to perform well + options.IncreaseParallelism(); + options.OptimizeLevelStyleCompaction(); + // create the DB if it's not already present + options.create_if_missing = true; + + // open DB + Status s = DB::Open(options, kDBPath, &db); + assert(s.ok()); + + // Put key-value + db->Put(WriteOptions(), "key1", "value1"); + assert(s.ok()); + + // create backup + BackupEngine* backup_engine; + s = BackupEngine::Open(Env::Default(), + BackupEngineOptions("/tmp/rocksdb_example_backup"), + &backup_engine); + assert(s.ok()); + + backup_engine->CreateNewBackup(db); + assert(s.ok()); + + std::vector<BackupInfo> backup_info; + backup_engine->GetBackupInfo(&backup_info); + + s = backup_engine->VerifyBackup(1); + assert(s.ok()); + + // Put key-value + db->Put(WriteOptions(), "key2", "value2"); + assert(s.ok()); + + db->Close(); + delete db; + db = nullptr; + + // restore db to backup 1 + BackupEngineReadOnly* backup_engine_ro; + s = BackupEngineReadOnly::Open( + Env::Default(), BackupEngineOptions("/tmp/rocksdb_example_backup"), + &backup_engine_ro); + assert(s.ok()); + + s = backup_engine_ro->RestoreDBFromBackup(1, "/tmp/rocksdb_example", + "/tmp/rocksdb_example"); + assert(s.ok()); + + // open db again + s = DB::Open(options, kDBPath, &db); + assert(s.ok()); + + std::string value; + s = db->Get(ReadOptions(), "key1", &value); + assert(!s.IsNotFound()); + + s = db->Get(ReadOptions(), "key2", &value); + assert(s.IsNotFound()); + + delete backup_engine; + delete backup_engine_ro; + delete db; + + return 0; +} |