map_size=MAX_SIZE, subdir=False, readonly=True, max_readers=MAX_READERS, max_dbs=4, lock=False, ) # Check if dataset is complete self.length = self._len_db() ifdatasetisnotNone: assertlen(dataset) == self.length,"Dataset Length Mismatch!" self.transform = transform def_cache_dataset...
# lmdb库安装pip install lmdb importlmdb# 创建或打开LMDB环境env=lmdb.open('path/to/your/database',max_dbs=1)# 开始一个写事务withenv.begin(write=True)astxn:# 执行写操作txn.put(b'key1',b'value1')# 开始一个读事务withenv.begin()astxn:value=txn.get(b'key1')print(value)# 输出:b'valu...
lmdb.open()class lmdb.Environment(path, map_size=10485760, subdir=True, readonly=False, metasync=True, sync=True, map_async=False, mode=493, create=True, readahead=True, writemap=False, meminit=True, max_readers=126, max_dbs=0, max_spare_txns=1, lock=True)https://lmdb.readthedocs.io...
db.openDB(database: string|{name:string,...}) LMDB supports multiple databases per environment (an environment corresponds to a single memory-mapped file). When you initialize an LMDB database withopen, the database uses the default root database. However, you can use multiple databases per ...
env = lmdb.open('/path/to/lmdb', max_dbs=10) # 开启事务 with env.begin() as txn: # 打开主数据库 db = txn.open_db() # 获取数据库统计信息 stat = txn.stat(db) # 遍历数据库列表 for i in range(stat['db_num']): # 获取数据库名称 ...
create() local jcodec = jsoncodec() driver.set_max_dbs(10) driver.set_codec(jcodec) driver.open("./lmdb/xxx.mdb", MDB_NOSUBDIR, 0644) driver.begin_txn("test", MDB_CREATE) local a = driver.put("abc1", {a=123}) local b = driver.put("abc2", "234") local c = driver.put(...
lmdb.open() 这个方法实际上是 class lmdb.Environment(path, map_size=10485760, subdir=True, readonly=False, metasync=True, sync=True, map_async=False, mode=493, create=True, readahead=True, writemap=False, meminit=True, max_readers=126, max_dbs=0, max_spare_txns=1, lock=True) 的一个...
.setMaxDbs(lmdbDatabaseCount) .setMaxReaders(lmdbDatabaseCount*2) .open(path); log.info("初始化Lmdb成功..."); } catch (Exception e) { throw new LmdbException("IO failure", e); } } /** * Description: 向库中插入数据 * @param ...
这和事务对象有关。pip install imdb >>> env = lmdb.open('/tmp/test', max_dbs=2)>>> with env.begin(write=True) as txn ... txn.put('somename', 'somedata')>>> # Error: database cannot share name of existing key!>>> subdb = env.open_db('somename')
/** Max #MDB_txninfo.%mti_numreaders of interest to #mdb_env_close() */ volatile int me_close_readers; MDB_dbi me_numdbs; /**< number of DBs opened */ MDB_dbi me_maxdbs; /**< size of the DB table */ MDB_PID_T me_pid; /**< process ID of this env */ ...