The very first step to start the data migration is to setup and install Microsoft SQL Server Migration Assistant for Oracle on the system where you want to host your migrated database. Here, I will give you step by step process to proceed with the installation. First, we should check all the prerequisites for SSMA for Oracle.

Prerequisites

Make sure to validate all steps mentioned below before going to install Microsoft SQL Server Migration Assistant for Oracle.

• Make sure you have already installed SQL Server instance that will host the migrated database. Also keep in mind that you are not installing SQL Server Express edition to host the migrated database.
• You must have sysadmin account to install SQL Server Migration Assistant for Oracle.
• Make sure to install SSMA for Oracle on the server that will host newly migrated database on SQL Server.
• It is recommended to install Oracle client software on your target system where SQL Server Instance is running.
• Make sure your windows server has Microsoft Windows Installer 3.1 or a later version.
• Port 1434 should be open.

Step by Step Process to Install SQL Server Migration Assistant for Oracle

There are three steps you should go through if you want to install Oracle to SQL Server Migration Tool SSMA for Oracle.

• Oracle to SQL Server Migration Tool Download
• Install SSMA for Oracle
• Install SSMA for Oracle Extension Pack

Let’s go one by one and complete the installation of Microsoft SQL Server Migration Assistant for Oracle tool.

Oracle to SQL Server Migration Tool Download

First step is Oracle to SQL Server migration tool download. We will first download its installation package from Microsoft website attached in the link. As of now latest version of Microsoft SQL Server Migration Assistant for Oracle is v7.8. Download the required packages from attached link. Microsoft SQL Server Migration Assistant for Oracle contains three packages as shown in below screenshot.

First two packages are same; one for 64 bit system and another one for 32 bit system. Third one is SSMA for Oracle extension pack. We need to download two packages (any one from first two based on your system architecture and one extension pack) for Oracle to SQL migration. The name of packages that i have downloaded are given below.

• SSMAforOracle_7.8.0.msi
• SSMAforOracleExtensionPack_7.8.0.msi

You can see both packages have been downloaded on my machine in below screenshot.

First package SSMAforOracle is mandatory to install for oracle to SQL migration. We will be installing both packages in sequence one after another. You cannot install extension pack if you have not installed SSMA for Oracle base package. Here, I will show you how to install Microsoft SQL Server Migration Assistant for Oracle and SSMA for Oracle Extension Pack.

Install Microsoft SQL Server Migration Assistant for Oracle

As we have downloaded both required packages for SSMA for Oracle in above section. Now we will start the installation. Right click on first package “SSMAforOracle_7.8.0” and click at “Run as Administrator” to launch the installation window. Installation of this package is very easy and smooth whereas installation of second package requires some configurational parameters that I will describe in next section of this article.

You will get below welcome page window to start the SSMA for Oracle installation. Click on Next button to go to next window.

Next window will ask you to validate whether you have installed Oracle client software or not as I have described in prerequisite section. You can also install it later post this installation. I would suggest you to first install Oracle client before going with this installation. You can also download the Oracle client package from this window by clicking at Download button. Click Next to go to next window.

Here, accept the License agreement and click on Next button to proceed.

Here, we need to choose what type of setup we should install for SSMA for Oracle. I have chosen first option that is “Typical”.

When you click at Typical option to select it, the setup will move you to final window of this setup. Here, click at “Install” button to finish the SSMA for oracle installation.

Once Microsoft SQL Server Migration Assistant for Oracle will be installed, you will get below image. Click on Finish button to close this window.

Now SSMA for Oracle is installed, next we will configure Microsoft SQL Server Migration Assistant for Oracle Extension Pack to support server to server migration from Oracle to SQL Server migration.

Install SSMA for Oracle Extension Pack

Microsoft SQL Server Migration Assistant for Oracle Extension Pack creates two databases sysdb and ssmatesterdb on the target SQL Server Instance. The database sysdb contains the tables and stored procedures that are required to migrate data, and the user-defined functions that emulate Oracle system functions. The ssmatesterdb database contains the tables and procedures that are required by the Tester component.

Also, when you migrate data to SQL Server, SSMA creates SQL Server Agent jobs when server side data migration engine is used for migrating the data. Now let’s go ahead and start the installation of SSMA extension pack.

Installation of SSMA extension pack has two steps. First step is very much like the installation of first package that we did in above section so I am not going to attach the screenshots for this step because all are similar to the installation of first package. Second step of this installation is to configuration part where installation will install few SQL scripts that will support this migration. I will show the screenshots for this configuration part post installation of extension pack. Both Steps will come during running extension pack installation package.

Right click on second package SSMAforOracleExtensionPack_7.8.0 and click at “Run as Administration”. Again, you will get welcome page of installation.

Click Next button to proceed. If you have not installed Oracle client yet then you will get to notify oracle client is missing and you should install it before getting license agreement window. If you have already installed Oracle client then you will get next window to accept the license agreement. Accept the License agreement and click on Next button to proceed.

Now you will get next window to choose setup type. I have chosen Typical as I did in above section.

Once you click at typical option it will ask you to install the extension pack. Click on Install button to start the installation.

Once installation will be done you will get below window to configure the SSMA for Oracle tool. Now click on Next button to configure and install required SQL scripts.

Here, you need to enter the SQL Server Instance name on which you want to host your migrated database. Remember, SSMA system databases sysdb and ssmatesterdb both databases will be created on this instance only.

Click Next button to enter connection parameters post entering the SQL Server instance name.

Enter Connection details that you are using to connect to database instance in above screenshot. Click Next button now.

Enter password to protect the passwords stored in databases sysdb and ssmatesterdb. Again, click next now.

Here, setup will ask you to create the system databases sysdb and ssmatesterdb on your given database instance. Choose options accordingly on below page and click on next button.

A processing will happen just like below image once you click at next button.

Once processing will be completed, SSMA for oracle extension pack will be installed. And a icon will be created on your server desktop.

You can also validate it by connecting to database instance that you have given during configuration of extension pack. You will see both system databases sysdb and ssmatesterdb will be created there for this migration.

Once both packages will be installed, make sure to run below command to enable clr.

sp_configure 'clr enabled', 1 
GO 
RECONFIGURE 
GO

If CLR is not enabled, you will receive the following error when SSMA connects to SQL Server:

SSMA could not retrieve the extension pack assembly version information. Reinstall the extension pack on the database server.

You will see many database objects created on system db sysdb. Such objects are ssma_oracle.bcp_migration_packages, ssma_oracle.db_storage, and ssma_oracle.db_error_list table along with many stored procedures and user-defined functions in the ssma_oracle schema.

Every time that you migrate data to SQL Server, SSMA creates a SQL Server Agent job. These jobs are named ssma_oracle data migration package {GUID}, and are visible in the SQL Server Agent node of SQL Server Management Studio in the Jobs folder.

Here we have installed Microsoft SQL Server Migration Assistant for Oracle and its Extension pack to migrate a database from Oracle to SQL Server. I hope you like this article. Please follow our Facebook page and Twitter handle to get latest updates.

Read More:

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The post How to Install SSMA for Oracle to Migrate Oracle Database to SQL Server appeared first on Techyaz.com.

We can control how much data SSMA will proceed at a time during migration. This way SSMA will process a consistent set of data every time. Batch size that you want to process during migration will be controlled by altering changes in Project Settings option.  With the help of Project Settings window, you can customize how SSMA migrates data from Oracle to SQL Server.

Customize Batch Size during Data Processing

You can control batch size either for only current project or for all projects that you will create in SSMA to migrate data. Here I will show you how to change the batch size of data migration for both options.

Change Batch Size that will apply to all projects in SSMA

Launch SSMA for Oracle. Click on Tools tab. You can see there are two options that are highlighted in below image.

• Project Settings
• Default Project Settings

Any changes you will make in Project Settings will apply to only current project of data migration whereas any changes you will make in Default Project Settings will apply on all projects that you will create in SSMA for Oracle.

Now if you want to change the batch size for all projects, click on Default Project Settings. You will get below window. Now click on Migration tab from left side pane. You can see the Batch Size is showing in to right side pane. Change the batch size as per your choice here. Remember, this will apply to all projects that you will create for migration. The value showing in this image is the default value for the Batch Size.

Change Batch Size for Current Projects only

If you want to change it only for current project, then you should click on Project Settings tab from the first image. Once you get Project Settings window, click on General option as highlighted in below image. Once you click on general, select Migration tab from left side pane. Again, you will get Batch Size settings in right side pane. Change as per your requirement and click on OK button to apply the change.

There are lot of options that you can change and customize for your data migration using Project Settings dialog box. Have a look at the all options and make changes that are suitable for your data migration. Make sure to do proper research about the settings that you are going to change and be aware about the impact of that setting on migration if you are changing its value.

Read More:

• Install Microsoft SQL Server Migration Assistant for oracle to Migrate Oracle Database to SQL Server
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The post How to Change Batch Size for Oracle to SQL Server Migration using SSMA appeared first on Techyaz.com.