how to backup mongodb database

I used to think that the full backup of SQL Server only backs up the data in the database and does not contain logs. In fact, this is an error. Using RESTOREHEADERONLY can help us verify (msdb. db I used to think that the full backup of SQL Server only backs up the data in the database and does not contain logs. In fa

%d%h%m%s ")"#在这边要注意一下, when executing mysqldump, must add the complete path, generally this backup file script is placed in the crontab, timed execution. And if you use mysqldump directly, without the complete path, the crontab Timer task will not be automatically executed, but the manual execution of the script has been successful, which involves CRONTAB environment variable problem, interested in further understanding, the portal here, http://blog.c

Hard Disks are valuable and data is priceless. We have been busy working for several days to see a lot of databases, but we can't lose them. Some people say I won't lose them. If you're so absolute, I can only ask you one question. If you're wrong, do you not want to perform the Postfix operation? This is another feature of backup. We can restore our database to you based on the time point. Hard Disks are v

code:Emit (This.classid,{count:1})3. Reduce aggregation calculationThe reduce function passes a parameter similar to the group effect, combining the sequence of key values returned by the map into {key,[value1,value2,value3,...] Pass to reduce as shown in the following code:The reduce function counts these values, in this case, the reduce function performs a summation of the number of records for the class individually, and the result is a JSON object4. Result gets resultsHow the result is obta

Tutorial on MSSQL Server database backup Restore method Full backup: Backs up all selected folders and does not rely on the archive properties of files to determine which files to back up. (During the backup process, any existing tags are cleared, each file is marked as backed up, in other words, the archive attribute

For details, refer to the Development notes of an Android tablet project-scheduled task backup Create a class to inherit from asynctask Public class backuptask extends asynctask // Obtain the path of the database in use. My path is/dlion/db_dlion.db under the sdcard directory.// The default path is/data/(package name)/databases /*. DB file dbfile = mcontext. getdatabasepath (environment. getexternalstoraged

belongs. DB. Foo. getindexes () displays all indexes of the table. DB. Foo. Group ({key:..., initial:..., reduce:... [, Cond:...]}) grouped by conditions DB. Foo. mapreduce (mapfunction, performancefunction, DB. Foo. Remove (query) delete data based on conditions DB. Foo. renamecollection (newname) renames the collection to rename the table DB. Foo. Save (OBJ) save data DB. Foo. Stats () view the table status DB. Foo. storagesize ()-distributed des free space allocated to this collecti

; Next (); }); }); Questionschema.set ( ' Toobject ', {getters: true }); As a result, each time question executes the Save method, the function is called to obtain the most recent ID after the increment. Backup and import of database backup and import of course is necessary, for example, you can take this my backup

2014-08-10 BaoxinjianI. Summary 1. Cold BackupThe process of completing all physical system file copies in a closed state, also known as offline backupSuitable for non-archive mode, the database is in a consistent state2. StepsStart by getting all the physical file locations of the database running in the running library, and then shutting down the database

Why do I need a delayed backup?Percona-xtrabackup is an excellent tool for incremental backups. The delayed backups we talked about today are also using their products.AB replication was previously mentioned in the MySQL AB replication article. Let's first review the key points of MySQL replication. AB replication is also known as master-slave replication, the implementation of data synchronization. After the following steps: 1 The primary server rec

records (limit 3, 5)Db.users.find (). Skip (3). Limit (5);Sort sortsWith age ascending ASCDb.users.find (). Sort ({age:1}); With age descending desc db.users.find (). Sort ({Age:-1});Cursorfor (var C = Db.t3.find (); C.hasnext ();) {Printjson (C.next ());}MongoDB also has another way to handle cursors> Db.t3.find (). ForEach (function (u) {printjson (U);});Stored ProceduresThe first thing you need to know about stored procedures is that it's written

10) db.char.find ({' name ': ' Weixiaobao '}). Skip (2). Limit (10)f) The query returns the number of bars Db.char.find ({' name ': ' Weixiaobao '}). Count ()g) sort (by name ascending, age descending) Db.char.find (). Sort ({' name ': 1, ' age ':-1})h) Query the specified column to db.char.distinct (' name ')i) Remove the set Db.char.drop ()j) Create index Db.char.ensureIndex ({' Name ': 1, ' Age ': 1},{unique:true})k) View index db.char.getIndexes ()L) Delete index Db.char.dropIndex (' IndexN

Previously thoughtSqlserverA full backup only backs up database data and does not contain logs. In fact, this is an error. UseRestoreheaderonlyCan help us verify (MSDB.DBO.Backupset also contains the corresponding information). Restore headeronlyReturns the result set that contains all backup header information of all ba