If you are already familiar with other cluster technologies, you will find MySQL cluster similar to them.
VSS allows backups to be taken of in-use, locked, or inaccessible files without interrupting whatever process or user is currently accessing those files.
This is especially useful for databases, as it means backups can be taken while the database is active, without requiring downtime. Each writer is controlled by a Windows Service. A list of currently available writers can be seen via the command line on any Windows machine.
Open a command prompt as an Administrator and run the command: A writer in the Stable state is ready and waiting to take a backup. Writers in the Failed or Unstable states have encountered a problem, and may need to be reset.
Writers that are currently In-Progress are being used for a backup. If no backups are running, the writer may be stuck, and can be reset like Failed or Unstable writers.
Restarting the service that controls the writer will reset the writer and, in most cases, bring it back to a stable state.
It is important to note that not all controlling services can be restarted. If a service cannot be restarted, a reboot of the machine is required.Aug 28, · This article summarizes error codes that may occur in System Center vNext Data Protection Manager.
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Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again.
Feb 06, · Hi, SQL Server has it's own dedicated writer, so you can try just restarting that to see if it helps. C:\>net stop "SQL Server VSS Writer" C:\>net start "SQL Server VSS Writer" There may be more detailed application event log errors for you to look . This default writer for SQL Server connects to all instances of SQL Server that are started on the local system, obtains the required information about the databases on the instance of SQL Server, and then creates the metadata document.
Codename Final name Notes Ref SQLNT SQL Server SQL95 SQL Server Hydra SQL Server Sphinx SQL Server Plato OLAP Services "OLAP Services" was later renamed Microsoft Analysis Services: Shiloh.