Chapter 17: Parallel Databases
... A partitioning vector [vo, v1, ..., vn-2] is chosen. Let v be the partitioning attribute value of a tuple. Tuples such that vi vi+1 go to disk I + 1. Tuples with v < v0 go to disk 0 and tuples with v vn-2 go to disk n-1. E.g., with a partitioning vector [5,11], a tuple with partitioning attr ...
... A partitioning vector [vo, v1, ..., vn-2] is chosen. Let v be the partitioning attribute value of a tuple. Tuples such that vi vi+1 go to disk I + 1. Tuples with v < v0 go to disk 0 and tuples with v vn-2 go to disk n-1. E.g., with a partitioning vector [5,11], a tuple with partitioning attr ...
SQL Server and Oracle
... Museum, Library and Archive manual), you may open, in a/o Microsoft’s SQL Server Management Studio (Express) or SQL Server Enterprise Manager, an Adlib SQL Server database, and in the Oracle Enterprise Manager Console an Adlib Oracle database, if you would like to see the structure or contents of it ...
... Museum, Library and Archive manual), you may open, in a/o Microsoft’s SQL Server Management Studio (Express) or SQL Server Enterprise Manager, an Adlib SQL Server database, and in the Oracle Enterprise Manager Console an Adlib Oracle database, if you would like to see the structure or contents of it ...
DataGuard_for_RAC_migrations_v2 - Indico
... • The Data Guard based migration procedure has been used this year at CERN: – we migrated all production and validation databases ~15 systems in total – we moved from RHEL 3 to RHEL 4 at the same ...
... • The Data Guard based migration procedure has been used this year at CERN: – we migrated all production and validation databases ~15 systems in total – we moved from RHEL 3 to RHEL 4 at the same ...
JDBC - WordPress.com
... JDBC batch processing • Batch processing allows you to group related SQL statements into a batch and submit them with one call to the database. • The addBatch() is used to add individual statements to the batch. • The executeBatch() is used to start the execution of all the statements grouped toget ...
... JDBC batch processing • Batch processing allows you to group related SQL statements into a batch and submit them with one call to the database. • The addBatch() is used to add individual statements to the batch. • The executeBatch() is used to start the execution of all the statements grouped toget ...
Java Database Connectivity (JDBC)
... • Type 1: Uses a bridging technology to access a database. JDBC-ODBC bridge is an example. It provides a gateway to the ODBC. • Type 2: Native API drivers. Driver contains Java code that calls native C/C++ methods provided by the database vendors. • Type 3: Generic network API that is then translate ...
... • Type 1: Uses a bridging technology to access a database. JDBC-ODBC bridge is an example. It provides a gateway to the ODBC. • Type 2: Native API drivers. Driver contains Java code that calls native C/C++ methods provided by the database vendors. • Type 3: Generic network API that is then translate ...
Chapter 1
... Data Definition Language (DDL): A set of SQL commands that create and define objects in a database, storing their definitions in a data dictionary. An example DDL command is the CREATE TABLE command. DDL allows the user to create, drop, and alter a database object, and to grant and revoke privileg ...
... Data Definition Language (DDL): A set of SQL commands that create and define objects in a database, storing their definitions in a data dictionary. An example DDL command is the CREATE TABLE command. DDL allows the user to create, drop, and alter a database object, and to grant and revoke privileg ...
Berkeley DB Proceedings of the FREENIX Track: 1999 USENIX Annual Technical Conference
... which consist of key/value pairs. Keys are used to locate items and can be any data type or structure supported by the programming language. The programmer can provide the functions that Berkeley DB uses to operate on keys. For example, B+trees can use a custom comparison function, and the Hash acce ...
... which consist of key/value pairs. Keys are used to locate items and can be any data type or structure supported by the programming language. The programmer can provide the functions that Berkeley DB uses to operate on keys. For example, B+trees can use a custom comparison function, and the Hash acce ...
Slide 1
... • synchronization may not be possible or come at performance cost • not transparent to applications • takes development focus out of business logic into infrastructure ...
... • synchronization may not be possible or come at performance cost • not transparent to applications • takes development focus out of business logic into infrastructure ...
4_sql_recovery_1
... A useful way to view the read committed and serializable isolation levels in Oracle is to consider the following scenario: Assume you have a collection of database tables (or any set of data), a particular sequence of reads of rows in those tables, and the set of transactions committed at any partic ...
... A useful way to view the read committed and serializable isolation levels in Oracle is to consider the following scenario: Assume you have a collection of database tables (or any set of data), a particular sequence of reads of rows in those tables, and the set of transactions committed at any partic ...
JDBC/Oracle tutorial
... Non-procedural language, because more than one record can be accessed rather than one record at a time. It is common language for all relational databases. In other words it is portable and it requires very few modifications so that it can work on other databases. Very simple commands for querying, ...
... Non-procedural language, because more than one record can be accessed rather than one record at a time. It is common language for all relational databases. In other words it is portable and it requires very few modifications so that it can work on other databases. Very simple commands for querying, ...
Enterprise console
... Capacity Planning - align server and storage capacity with database growth ...
... Capacity Planning - align server and storage capacity with database growth ...
Microsoft SQL Server 2000 Security Overview
... NTFS permissions on the files and turning of the debugging messages returned by the server in case of an error. In IIS, debug messages can be turned off by going to the Internet Services Manager, properties, home directory, configuration, App debugging, then checking the box “send text error message ...
... NTFS permissions on the files and turning of the debugging messages returned by the server in case of an error. In IIS, debug messages can be turned off by going to the Internet Services Manager, properties, home directory, configuration, App debugging, then checking the box “send text error message ...
Slides for Ch-4
... to be placed on host language variables. EXEC SQL fetch c into :cn, :cc END-EXEC Repeated calls to fetch get successive tuples in the query result A variable called SQLSTATE in the SQL communication area (SQLCA) ...
... to be placed on host language variables. EXEC SQL fetch c into :cn, :cc END-EXEC Repeated calls to fetch get successive tuples in the query result A variable called SQLSTATE in the SQL communication area (SQLCA) ...
The End of a Myth: Distributed Transactions Can Scale
... But what if distributed transactions could be made scalable using the next generation of networks and we could rethink the distributed database design? What if we would treat every transaction as a distributed transaction? The performance of the system would become more predictable. The developer wo ...
... But what if distributed transactions could be made scalable using the next generation of networks and we could rethink the distributed database design? What if we would treat every transaction as a distributed transaction? The performance of the system would become more predictable. The developer wo ...
MCSA: SQL Server 2012 - Microsoft Learning Campaign Factory
... The recertification requirement does not apply to Microsoft Certified Solutions Associate (MCSA) certifications. ...
... The recertification requirement does not apply to Microsoft Certified Solutions Associate (MCSA) certifications. ...
SQL Data Types and Schemas Integrity Constraints Authorization
... Functions are particularly useful with specialized data types such as images and geometric objects Example: ...
... Functions are particularly useful with specialized data types such as images and geometric objects Example: ...
File - You have to dream before your dreams can come
... Typically, an application program prompts the user for the text of a SQL statement and the values of host variables used in the statement. Oracle then parses the SQL statement to ensure it meets syntax rules. Next, Oracle binds the host variables to the SQL statement. That is, Oracle gets the addres ...
... Typically, an application program prompts the user for the text of a SQL statement and the values of host variables used in the statement. Oracle then parses the SQL statement to ensure it meets syntax rules. Next, Oracle binds the host variables to the SQL statement. That is, Oracle gets the addres ...
Comparing Oracle and SQL Server What is a database?
... • Nonquoted names can contain only: • Alphanumeric characters from your database character set • The underscore (_) • Dollar sign ($) • Pound sign (#) • No two objects can have the same name within the same namespace. • MS Tip: OMWB assists with resolving naming conflicts. ...
... • Nonquoted names can contain only: • Alphanumeric characters from your database character set • The underscore (_) • Dollar sign ($) • Pound sign (#) • No two objects can have the same name within the same namespace. • MS Tip: OMWB assists with resolving naming conflicts. ...
PL/SQL Triggers
... Simple data validity checks can be accomplished with CHECK constraints. However, more complex checks or checks that require comparison to a live data value from the database can be accomplished using triggers. A trigger could be used to ensure that any changes to the regular price of a product do no ...
... Simple data validity checks can be accomplished with CHECK constraints. However, more complex checks or checks that require comparison to a live data value from the database can be accomplished using triggers. A trigger could be used to ensure that any changes to the regular price of a product do no ...
What_Is_A_DBA
... What is a DBA? What does that mean??????? • IT Professional - The key word here is professional. Great DBA’s rarely do things “good enough”. It’s not in our vocabulary. • Installation - You need to perform capacity planning, needs analysis, future requirements, security requirements and obsolescence ...
... What is a DBA? What does that mean??????? • IT Professional - The key word here is professional. Great DBA’s rarely do things “good enough”. It’s not in our vocabulary. • Installation - You need to perform capacity planning, needs analysis, future requirements, security requirements and obsolescence ...
Avoiding SQL Performance Regressions - Oracle DBA
... Database Replay was also used at NHN but for purposes of this session we limit discussion to SPA Collected 13.7K queries for 3 days Those were all queries for that represented workload to be tested Test environment used the same types of machines as production system. Both used two nodes RAC and t ...
... Database Replay was also used at NHN but for purposes of this session we limit discussion to SPA Collected 13.7K queries for 3 days Those were all queries for that represented workload to be tested Test environment used the same types of machines as production system. Both used two nodes RAC and t ...
SQL Concepts vs. SQL Code: Improving Programs using the 8 SQL
... UNION: Consider the example presented in Tables 5 and 6. To implement this in Excel, one would first add columns – X and Y - to both tables (by click and inserts). Then one would click, drag and paste to union the two tables. Again with some simple modifications this can be recorded with Visual Basi ...
... UNION: Consider the example presented in Tables 5 and 6. To implement this in Excel, one would first add columns – X and Y - to both tables (by click and inserts). Then one would click, drag and paste to union the two tables. Again with some simple modifications this can be recorded with Visual Basi ...
ppt
... Then regular compiler used to compile the host language+function class into executable. ...
... Then regular compiler used to compile the host language+function class into executable. ...
Tandem Computers
Tandem Computers, Inc. was the dominant manufacturer of fault-tolerant computer systems for ATM networks, banks, stock exchanges, telephone switching centers, and other similar commercial transaction processing applications requiring maximum uptime and zero data loss. The company was founded in 1974 and remained independent until 1997. It is now a server division within Hewlett Packard.Tandem's NonStop systems use a number of independent identical processors and redundant storage devices and controllers to provide automatic high-speed ""failover"" in the case of a hardware or software failure. To contain the scope of failures and of corrupted data, these multi-computer systems have no shared central components, not even main memory. Conventional multi-computer systems all use shared memories and work directly on shared data objects. Instead, NonStop processors cooperate by exchanging messages across a reliable fabric, and software takes periodic snapshots for possible rollback of program memory state.Besides handling failures well, this ""shared-nothing"" messaging system design also scales extremely well to the largest commercial workloads. Each doubling of the total number of processors would double system throughput, up to the maximum configuration of 4000 processors. In contrast, the performance of conventional multiprocessor systems is limited by the speed of some shared memory, bus, or switch. Adding more than 4–8 processors that way gives no further system speedup. NonStop systems have more often been bought to meet scaling requirements than for extreme fault tolerance. They compete well against IBM's largest mainframes, despite being built from simpler minicomputer technology.