进阶指南（mongodb权威指南第7章）

• 通过数据库命令使用高级功能
• 使用一种特殊的集合-固定大小的集合
• 使用GridFS存储大文件
• 使用monogdb对服务端javascript的支持
• 理解何为数据库引用，何时该使用

7.1 数据库命令

     高级操作都是用命令来实现的。

    

7.2 固定集合

 

7.3 GridFS存储文件

 

D:\java\mongodb-win32-i386-2.2.3\bin>mongofiles list connected to: 127.0.0.1 D:\java\mongodb-win32-i386-2.2.3\bin>echo "hello world">foo.txt D:\java\mongodb-win32-i386-2.2.3\bin>mongofiles put foo.txt connected to: 127.0.0.1 added file: { _id: ObjectId('514d4518742660e77bed9273'),                  filename: "foo.txt",                  chunkSize: 262144,                  uploadDate: new Date(1364018457090),                  md5: "6090a246407a6581ab385fa5b13e3679",                  length: 15               } done! D:\java\mongodb-win32-i386-2.2.3\bin>mongofiles lisst connected to: 127.0.0.1 ERROR: need a filename Browse and modify a GridFS filesystem. usage: mongofiles [options] command [gridfs filename] command:   one of (list|search|put|get)   list - list all files.  'gridfs filename' is an optional prefix          which listed filenames must begin with.   search - search all files. 'gridfs filename' is a substring            which listed filenames must contain.   put - add a file with filename 'gridfs filename'   get - get a file with filename 'gridfs filename'   delete - delete all files with filename 'gridfs filename' options:   --help                  produce help message   -v [ --verbose ]        be more verbose (include multiple times for more                           verbosity e.g. -vvvvv)   --version               print the program's version and exit   -h [ --host ] arg       mongo host to connect to ( <set name>/s1,s2 for sets)   --port arg              server port. Can also use --host hostname:port   --ipv6                  enable IPv6 support (disabled by default)   -u [ --username ] arg   username   -p [ --password ] arg   password   --dbpath arg            directly access mongod database files in the given                           path, instead of connecting to a mongod  server -                           needs to lock the data directory, so cannot be used                           if a mongod is currently accessing the same path   --directoryperdb        if dbpath specified, each db is in a separate                           directory   --journal               enable journaling   -d [ --db ] arg         database to use   -c [ --collection ] arg collection to use (some commands)   -l [ --local ] arg      local filename for put|get (default is to use the                           same name as 'gridfs filename')   -t [ --type ] arg       MIME type for put (default is to omit)   -r [ --replace ]        Remove other files with same name after PUT D:\java\mongodb-win32-i386-2.2.3\bin>mongofiles list connected to: 127.0.0.1 foo.txt 15 D:\java\mongodb-win32-i386-2.2.3\bin>mongofiles get foo.txt connected to: 127.0.0.1 done write to: foo.txt

7.4 服务器端脚本

 

7.5 数据库应用