Insufficient free space for journal files

   前两天请假了，公司的很多app突然挂掉了，说是mongodb莫名的挂掉了，赶紧进去看了看日志：

2015-08-31T14:06:20.070+0800 [initandlisten] ERROR: Insufficient free space for journal files
2015-08-31T14:06:20.070+0800 [initandlisten] Please make at least 3379MB available in /data/mongodb/data/journal or use --smallfiles
2015-08-31T14:06:20.070+0800 [initandlisten] 
2015-08-31T14:06:20.070+0800 [initandlisten] exception in initAndListen: 15926 Insufficient free space for journals, terminating
2015-08-31T14:06:20.070+0800 [initandlisten] dbexit: 
2015-08-31T14:06:20.071+0800 [initandlisten] shutdown: going to close listening sockets...
2015-08-31T14:06:20.071+0800 [initandlisten] shutdown: going to flush diaglog...
2015-08-31T14:06:20.071+0800 [initandlisten] shutdown: going to close sockets...
2015-08-31T14:06:20.071+0800 [initandlisten] shutdown: waiting for fs preallocator...
2015-08-31T14:06:20.071+0800 [initandlisten] shutdown: lock for final commit...
2015-08-31T14:06:20.071+0800 [initandlisten] shutdown: final commit...
2015-08-31T14:06:20.071+0800 [initandlisten] shutdown: closing all files...
2015-08-31T14:06:20.071+0800 [initandlisten] closeAllFiles() finished
2015-08-31T14:06:20.071+0800 [initandlisten] journalCleanup...
2015-08-31T14:06:20.071+0800 [initandlisten] removeJournalFiles
2015-08-31T14:06:20.075+0800 [initandlisten] shutdown: removing fs lock...
2015-08-31T14:06:20.075+0800 [initandlisten] dbexit: really exiting now

查了查，原来是因为mongodb对硬盘的增长是以倍数增长的，每次增加2G，刚好不够了~

看到错误日志中解决的办法是使用 --smallfiles参数，然后我就试了试

./mongod --dbpath /data/mongodb/data --logpath /data/mongodb/mongodb.log --smallfiles

好是好了，可是一直在输出log，只要一终止，mongodb就又挂了，然后看了看mongodb的参数。找到了一个 --fork ，创建一个子进程参数。好的

./mongod --dbpath /data/mongodb/data --logpath /data/mongodb/mongodb.log --smallfiles --fork

搞定~~

 但是这次的事情能反映好多问题，运维方面的东西需要多多加强了~~，感觉自己简直弱爆了