Question

由于mongodb数据库的大小，我试图构建并且因为我需要一个可以处理并行写入的文件系统，所以我将它移动到具有lustreFS的集群上，以满足这些需求。

问题在于我无法启动mongod，因此我无法将任何内容连接到数据库，因为mongod无法锁定mongod.lock。我没有root或sudo权限，但这似乎不是问题，因为没有提到权限，你可以看到：

    [user@host mongo]$ ./mongod --dbpath=path-to-db
2014-07-28T20:29:58.600+0300 [initandlisten] MongoDB starting : pid=54974 port=27017 dbpath=path-to-db 64-bit host=hostname
2014-07-28T20:29:58.600+0300 [initandlisten] 
2014-07-28T20:29:58.600+0300 [initandlisten] ** WARNING: /proc/sys/vm/zone_reclaim_mode is 1
2014-07-28T20:29:58.600+0300 [initandlisten] **          We suggest setting it to 0
2014-07-28T20:29:58.600+0300 [initandlisten] **          http://www.kernel.org/doc/Documentation/sysctl/vm.txt
2014-07-28T20:29:58.600+0300 [initandlisten] db version v2.6.3
2014-07-28T20:29:58.601+0300 [initandlisten] git version: 255f67a66f9603c59380b2a389e386910bbb52cb
2014-07-28T20:29:58.601+0300 [initandlisten] build info: Linux build12.nj1.10gen.cc 2.6.32-431.3.1.el6.x86_64 #1 SMP Fri Jan 3 21:39:27 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49
2014-07-28T20:29:58.601+0300 [initandlisten] allocator: tcmalloc
2014-07-28T20:29:58.601+0300 [initandlisten] options: { storage: { dbPath: "path-to-db" } }
2014-07-28T20:29:58.614+0300 [initandlisten] exception in initAndListen: 10310 Unable to lock file: path-to-db/mongod.lock. Is a mongod instance already running?, terminating
2014-07-28T20:29:58.615+0300 [initandlisten] dbexit: 
2014-07-28T20:29:58.615+0300 [initandlisten] shutdown: going to close listening sockets...
2014-07-28T20:29:58.615+0300 [initandlisten] shutdown: going to flush diaglog...
2014-07-28T20:29:58.615+0300 [initandlisten] shutdown: going to close sockets...
2014-07-28T20:29:58.615+0300 [initandlisten] shutdown: waiting for fs preallocator...
2014-07-28T20:29:58.615+0300 [initandlisten] shutdown: lock for final commit...
2014-07-28T20:29:58.615+0300 [initandlisten] shutdown: final commit...
2014-07-28T20:29:58.615+0300 [initandlisten] shutdown: closing all files...
2014-07-28T20:29:58.615+0300 [initandlisten] closeAllFiles() finished
2014-07-28T20:29:58.615+0300 [initandlisten] dbexit: really exiting now

请你告诉我是否有任何关于锁定的方法？不，没有任何其他mongod实例在运行。

解决方案：群集管理员正在禁用文件锁定。启用文件锁定后，mongod就会启动并接受连接。

mongodb：有没有办法阻止mongod试图锁定mongod.lock？

0 个答案: