mongodb file system

Problem phenomenon:1, in the configuration of the Python environment to install MongoDB found in the "service" manual start failure, error is as follows:2, in the CMD also can not start, note here to start cmd as an administrator ohProblem solving:1. The net start MongoDB needs to be executed under the bin first2. Start the Mongo.exe under the bin file and you ca

in greatly limited# functionality#noscripting =true# Turns off table scans. Any query this would do a table scan fails.#notablescan =true# Disable data File preallocation.#noprealloc =true# specify. ns file size for new databases.# nssize=# Replication Options# in replicated MONGO databases, specify the replica set name here#replSet =repset# maximum size in megabytes for replication operation logoplogsize=

1, Mount exampleMount (/dev/hdb1 to/home/xpl) A. to mount a new device, you must create a superblock first. Use file_system_type of the file system to be mounted and call get_sb () to create a new super blockb. create vfsmountfor/dev/hdb1 and add to current EMC. new vfsmount:-mountpoint the dentry-mnt_root for xpl points to the vfsmount where/home/xpl is located for the root dentry-mnt_parent on the hdb1 De

1, the Gridfs of MongoDB detailed analysisGridfs IntroductionGridfs is a built-in feature in MongoDB that can be used to store a large number of small files.Http://www.mongodb.org/display/DOCS/GridFSHttp://www.mongodb.org/display/DOCS/GridFS+SpecificationGridfs useMongoDB provides a command line tool that Mongofiles can handle Gridfs in the bin directory.List all Files:Mongofiles ListUpload a file:Mongofile

According to the official website installation method: The following error may occur under the Ubuntu system: Couldn ' t remove FS lock errno:9 Bad file descriptor The file owner needs to be modified at this time $ sudo mkdir-p/data/db/ $ sudo chown ' USERNAME '/data/db The first sentence is to create your database folder, the second sentence to modify the

Solution: The MongoDB log file is too large. When logappend = true is set, MongoDB log files are constantly appended to the same log file. After a long time, the log files become very large. The solution is as follows:(Note: at startup, the log path must be specified in -- logpath) Connect to the server with mongo a

Tags: des io os ar for div art sp CTI1, install MongoDB as the command shown in Windows system Services, Byruiy Tips[note,logpath and DBPath according to your command line guidance path, these directories must have been created]2, start MongoDB based on CMD3,MONGODB Create a user, and auth authentication, this operatio

skipped.The code is as follows:Import Os,globImport Re,pymongo#-----Connect MongoDB-----conn = Pymongo. Connection ("localhost", 27017)db = Conn.flowcounterFlowlist = Db.flowcollection#要存储的文本File = Open ("Test.txt", "R")#用于存储每一条记录的swiftnum值 to prevent repeated insertionsswiftnums = open ("Swiftnums.txt", "r+") #每条记录转成BSON文档时, the key for each domain Keyarray = ["Date", "Swiftnum", "url", "page", "IP", "At

%month% EQU4 SETday= - IF%month% EQU6 SETday= - IF%month% EQU9 SETday= - IF%month% EQU2 ( SETday= - IF%year% EQU . SETday= in IF%year% EQU2020 SETday= in IF%year% EQU2024 SETday= in)) REM****FORMATDay,month * * *IF%day% LSSTen SETday=0%day%IF%month% LSSTen SETMonth=0%month%SETldate=%year%-%month%-%day%SETRdate=%ldate%SETFdate=%year%%month%%day% REM****EXPORTMONGODB * * * * :RUN SETexp=Pagermongodb_export.bat%ldate%%rdate%%fdate%%exp% PU001%exp% PU002

Sometimes we use a virtual machine to install linux, but the system time of our developers may be adjusted due to some special requirements (for example, to keep some special software out of date and lock time ), in this way, the linux system has been unavailable for a long time. if the time is incorrect, the ext file system