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In computer science, Algorithms for Recovery and Isolation Exploiting Semantics, or ARIES, is a recovery algorithm designed to work with a no-force, steal database approach; it is used by IBM Db2, Microsoft SQL Server and many other database systems. [1] IBM Fellow Chandrasekaran Mohan is the primary inventor of the ARIES family of algorithms. [2]
In comparison, SQL server clusters enable automatic failover, but at the expense of much higher storage costs. Compared to database replication, log shipping does not provide as much in terms of reporting capabilities, but backs up system tables along with data tables, and locks the standby server from users' modifications. [ 6 ]
SQL refers to Structured Query Language, a kind of language used to access, update and manipulate database. In SQL, ROLLBACK is a command that causes all data changes since the last START TRANSACTION or BEGIN to be discarded by the relational database management systems (RDBMS), so that the state of the data is "rolled back" to the way it was before those changes were made.
TimesTen databases are persistent and can be highly available. Because it is an in-memory database it provides very low latency and high throughput. It provides standard relational database APIs and interfaces such as the SQL and PL/SQL languages. Applications access TimesTen using standard database APIs such as ODBC and JDBC.
Recovery Options: Catalog-assisted granular recovery of objects, files, folders, applications, or VMs (including Exchange, SharePoint, SQL Server, and Active Directory) directly from storage, with no mounting or staging. Restore to different targets or hardware (Dissimilar Hardware Recovery) Restore to physical or virtual servers [20]
In SQL Server versions 6.5 and earlier, database administrators (DBAs) used SQL Server Transfer Manager and Bulk Copy Program, included with SQL Server, to transfer data. These tools had significant shortcomings, and many [ quantify ] DBAs used third-party tools such as Pervasive Data Integrator to transfer data more flexibly and easily.
Point-in-time recovery (PITR) in the context of computers involves systems, often databases, whereby an administrator can restore or recover a set of data or a particular setting from a time in the past.
Most LSNs are assigned in monotonically increasing order, which is useful in recovery algorithms, like ARIES. Prev LSN: A link to their last log record. This implies database logs are constructed in linked list form. Transaction ID number: A reference to the database transaction generating the log record. Type: Describes the type of database ...