Because it must be unique, you cannot have more than one database with the same SID on the same Oracle server. When creating an Oracle SID, select one that includes the following elements. Not a dictionary word At least 10 characters in length Includes at least one special character Incorporating these elements will the SID is strong, that is, difficult for an attacker to brute force.
Industry-centric user groups e. However, since they share many of the same customers, Oracle and IBM tend to support each other's products in many middleware and application categories for example: Database products licensed as open source are, by the legal terms of the Open Source Definitionfree to distribute and free of royalty or other licensing fees.
Oracle Database Cloud Services  [ edit ] Customers can choose from a wide range of database services on Oracle Cloud that are available as 'pay as you go' hourly and monthly rates, and also have the option to re-use existing on-prem licenses on Oracle Cloud via a Bring Your Own License BYOL program.
The low entry cost, Oracle Database Standard Edition 2 SE2includes Real Application Clusters and may be deployed on servers or clusters with a maximum of 2 sockets total and capped to use a maximum of 16 concurrent user threads.
Support is via a free Oracle Discussion Forum Oracle database research paper. Physical and logical structures[ edit ] An Oracle database system—identified by an alphanumeric system identifier or SID  —comprises at least one instance of the application, along with data storage. An instance—identified persistently by an instantiation number or activation id: Oracle documentation can refer to an active database instance as a "shared memory realm".
In addition to storage, the database consists of online redo logs or logswhich hold transactional history. Processes can in turn archive the online redo logs into archive logs offline redo logswhich provide the basis for data recovery and for the physical-standby forms of data replication using Oracle Data Guard.
In version 10g, grid computing introduced shared resources where an instance can use CPU resources from another node in the grid. Information is shared between nodes through the interconnect—the virtual private network.
Storage[ edit ] The Oracle RDBMS stores data logically in the form of tablespaces and physically in the form of data files " datafiles ".
Segments in turn comprise one or more extents. Extents comprise groups of contiguous data blocks. Data blocks form the basic units of data storage. A DBA can impose maximum quotas on storage per user within each tablespace.
Specific partitions can then be added or dropped to help manage large data sets. Monitoring[ edit ] Oracle database management tracks its computer data storage with the help of information stored in the SYSTEM tablespace.
A data dictionary consists of a special collection of tables that contains information about all user- objects in the database.
Since version 8i, the Oracle RDBMS also supports "locally managed" tablespaces that store space management information in bitmaps in their own headers rather than in the SYSTEM tablespace as happens with the default "dictionary-managed" tablespaces.
Data and index files: These files provide the physical storage of data, which can consist of the data-dictionary data associated with the tablespace SYSTEMuser data, or index data.
DBAs can manage these files manually or leave their administration to Oracle itself. Note that a datafile has to belong to exactly one tablespace, whereas a tablespace can consist of multiple datafiles. Redo log files, recording all changes to the database — used to recover from an instance failure.
Often, a database stores these files multiple times for extra security in case of disk failure. Identical redo log files are associated in a "group". These special datafiles, which can only contain undo information, aid in recovery, rollbacks, and read-consistency.
These files, copies of the redo log files, are usually stored at different locations. They are necessary for example when applying changes to a standby database, or when performing recovery after a media failure.
One can store identical archive logs in multiple locations. These special datafiles serve exclusively for temporary storage data used for example during large sorts or for global temporary tables Control files, necessary for database startup.
Oracle Corporation defines a control file as "[a] binary file that records the physical structure of a database and contains the names and locations of redo log files, the time stamp of the database creation, the current log sequence number, checkpoint information, and so on".
Data files can occupy pre-allocated space in the file system of a computer server, use raw disk directly, or exist within ASM logical volumes. After the installation process sets up sample tables, the user logs into the database with the username scott and the password tiger.
Other default schemas   include: System Global Area[ edit ] Main article: The information in the SGA consists of the following elements, each of which has a fixed size, established at instance startup: Datafiles Every Oracle database has one or more physical datafiles, which contain all the database data.
The data of logical database structures, such as tables and indexes, is physically stored in the datafiles allocated for a database.
Datafiles have the following characteristics: One or more datafiles form a logical unit of database storage called a tablespace. A datafile can be associated with only one tablespace.Accelerating SQL Database Operations on a GPU with CUDA Peter Bakkum and Kevin Skadron The research relevant to this paper focuses on demonstrating that cer-tain database operations, (i.e.
operations that are logically cedures on Oracle  PostgreSQL databases  that GPU. Author's Note This paper represents the first in a series of papers on performing a forensic analysis of a compromised Oracle database server.
The research was performed on an Oracle 10g Release 2. Oracle Corporation is a multinational computer technology company which concentrates in generating and marketing enterprise software products, specifically database management structures.
Sun Microsystems is company which specializes in marketing computers, information technology services, and computer software. I wrote a paper about Oracle Database Vault in 12c for SANS last year and this was published in January by SANS on their website.
I also prepared and did a webinar about this paper with SANS. The Paper on Database Vault in 12c was sponsored by Oracle. The paper was an . WHITE PAPER: If your core business applications—like ERP, CRM, order entry, and other mission-critical apps—all run on 1 Oracle Database, you want to ensure you have an OS that can handle that.
Access this report to learn why Oracle Linux continues to be a popular choice for running your Oracle Database environments. Oracle Database Tips by Donald Burleson 5 February 07 This research paper titled " Oracle Real Application Clusters and Industry Trends in Cluster Parallelism and Availability " by James Hamilton, Architect, Microsoft SQL Server, at first appears to be an "unbiased" review of Microsoft v.