SQL Databases, Backup, and Free Space

Microsoft SQL databases have two components: Transaction Logs (.LDF) and Databases (.MDF).    Transaction Logs are designed to keep track of each transaction with the database.   If properly configured, they can provide some fault tolerance to failures.

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AdminSDHolder, Protected Groups and SDPROP

Active Directory Domain Services uses AdminSDHolder, protected groups and Security Descriptor propagator (SD propagator or SDPROP for short) to secure privileged users and groups from unintentional modification. This functionality was introduced in the inaugural release of Active Directory in Windows 2000 Server and it’s fairly well known.

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