今すぐお試しください!

製品の詳細MongoDB PowerShell Cmdlets を確認して、無償評価版をダウンロード:

今すぐダウンロード

MongoDB Data をMySQL にレプリケーションするPowerShell スクリプト

PowerShell でシンプルなスクリプトを記述し、MongoDB data をMySQL データベースにレプリケーション(複製)。

CData Cmdlets for MongoDB をつかって、PowerShell からリアルタイムMongoDB data に連携できます。データ同期などのタスクの連携にぴったりの製品です。 本記事では、PowerShell からCData Cmdlets for MongoDB およびCData Cmdlets for MySQL を使って、同期スクリプトを作成して実行します。

After obtaining the needed connection properties, accessing MongoDB data in PowerShell and preparing for replication consists of four basic steps.

MongoDB への接続には、Server、Database、User、Password プロパティを設定します。MongoDB コレクションにテーブルとしてアクセスするには、自動スキーマ検出を使用することができます。もちろんスキーマ定義の.rsd ファイルを編集して自分でスキーマ定義を書くことも可能です。スキーマに縛られないフリーフォーマットクエリを投げることもできます。

Collecting MongoDB Data

  1. Install the module:

    Install-Module MongoDBCmdlets
  2. Connect to MongoDB:

    $mongodb = Connect-MongoDB -Server $Server -Port $Port -Database $Database -User $User -Password $Password
  3. Retrieve the data from a specific resource:

    $data = Select-MongoDB -Connection $mongodb -Table "restaurants"

    You can also use the Invoke-MongoDB cmdlet to execute pure SQL-92 statements:

    $data = Invoke-MongoDB -Connection $mongodb -Query 'SELECT * FROM restaurants WHERE Name = @Name' -Params @{'@Name'='Morris Park Bake Shop'}
  4. Save a list of the column names from the returned data.

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name

Inserting MongoDB Data into the MySQL Database

With the data and column names collected, you are ready to replicate the data into a MySQL database.

  1. Install the module:

    Install-Module MySQLCmdlets
  2. Connect to MySQL, using the server address and port of the MySQL server, valid user credentials, and a specific database with the table in which the data will be replicated:

    $mysql = Connect-MySQL -User $User -Password $Password -Database $Database -Server $Server -Port $Port
  3. Loop through the MongoDB data, store the values, and use the Add-MySQL cmdlet to insert the data into the MySQL database, one row at a time. In this example, the table will need to have the same name as the MongoDB resource (restaurants) and to exist in the database.

    $data | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "restaurants" -Columns $columns -Values $values }

You have now replicated your MongoDB data to a MySQL database. This gives you freedom to work with MongoDB data in the same way that you work with other MySQL tables, whether that is performing analytics, building reports, or other business functions.

Notes

  • Once you have connected to MongoDB and MySQL in PowerShell, you can pipe command results to perform the replication in a single line:

    Select-MongoDB -Connection $mongodb -Table "restaurants" | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "restaurants" -Columns $columns -Values $values }
  • If you wish to replicate the MongoDB data to another database using another PowerShell module, you will want to exclude the Columns, Connection, and Table columns from the data returned by the Select-MongoDB cmdlet since those columns are used to help pipe data from one CData cmdlet to another:

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name | ? {$_ -NotIn @('Columns','Connection','Table')}
 
 
ダウンロード