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Topic: Database transaction

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Transaction

Database management system

Transaction processing

Mimer SQL

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Atomic transaction

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	Transaction Logging Concepts
		When an error occurs during a transaction, these log records are used to roll back the transaction, removing all of its effects on the database (restoring all data items to their previous values).
		Transactions can be rolled back explicitly at the request of the application or the user, or automatically by the database manager when an error occurs and the application is no longer able to communicate with the database.
		To recover the database, the roll-forward process combines a backup copy of the database with the records in the after-image log to redo all the changes that were made since the backup was created.
	www.peg.com /techpapers/monographs/logging/logging.html (5515 words)

	Database transaction - Wikipedia, the free encyclopedia
		A database transaction is a unit of interaction with a database management system or similar system that is treated in a coherent and reliable way independent of other transactions that must be either entirely completed or aborted.
		In database products the ability to handle transactions allows the user to ensure that integrity of a database is maintained.
		When this happens it is usually important to be sure that the database is not left with only some of the queries carried out.
	en.wikipedia.org /wiki/Database_transaction (364 words)

	Transaction processing - Wikipedia, the free encyclopedia
		Transaction processing is designed to maintain a database in a known, consistent state, by ensuring that any operations carried out on the database that are interdependent are either all completed successfully or all cancelled successfully.
		This transaction is a single operation in the eyes of the bank, but it involves at least two separate operations in computer terms: debiting the savings account by $500, and crediting the checking account by $500.
		In some cases, two transactions may, in the course of their processing, attempt to access the same portion of a database at the same time, in a way that prevents them from proceeding.
	en.wikipedia.org /wiki/Transaction_processing (1037 words)

	Magma Database Transaction Logging Persistency Squeak Smalltalk
		My understanding of the traditional approach is to perform "transaction logging" to a log file that can, in the event of a power failure in mid-commit, be used as input to a "recovery utility" to allow proper restoration of that transaction and overwrite any potential corruption in the main db file.
		Note that the primary purpose of a transaction log is not to "save the data", but to be able to bring the database back into a consistent state.
		In that case oracle freezes the database files and only writes to the redo-logs (they are the real thing).
	www.visoracle.com /squeakfaq/magma-database.html (1610 words)

	Single database transaction across a multiple HTTP requests?
		Having a database lock or a transaction in progress while waiting for user input is a disaster waiting to happen.
		This procedure helps prevent a situation known as a "deadly embrace" where transaction #1 locks table A, and transaction #2 locks table B. If transaction #1 then tries to lock table B it is forced to wait until transaction #2 releases the lock.
		A deadly embrace occurs when transaction #2, instead of releasing the lock on table B attempts instead to lock table A. Neither transaction can proceed until the other one releases its database locks, and neither transaction is willing to release the locks it already has in place.
	www.codecomments.com /message487390.html (3748 words)

	The Memory map database transaction with mls transactions list of 2005 and patellar transaction testing
		Truncate transaction log issues teams trx monitor transaction wtbti the server is not configured for transactions 2000 real estate transactions in the slo county property transaction in middle township cape may nj commerce transaction services retirement plan loans prohibited transaction.
		Transaction file is larger than the data file sql real estate transaction general release of liability transaction processing system definition fair and accurate credit transaction act irs transaction payment codes atm transaction fees europe hooker transactions, maximo inventory transactions transaction bancaire.
		Transaction processing system find out if casino reported a currency transaction report rand transaction cost economics johnson county real estate transactions in edinburgh indiana real estate transactions south windsor ct transaction publishers sql 2000 clear transaction log transaction management international business transactions arms length transaction ach direct transaction., cash transaction report vfoia transaction of business.
	memory-map-database-transaction.bekn.com (825 words)

	K-Zone computing -- EJB transactions
		Transaction management in EJBs is complicated by the fact that different principles apply to different (session and entity) EJBs, and the system works differently depending on which combinations of container-managed persistence and container-managed transcations the EJB is designed for.
		Transactions can be managed by the container; in this case the developer's role is to specify the correct `declarative' transaction attributes in the deployment descriptor.
		A transaction is a sequence of operations that must all complete successfully, or leave system in the state it had before the transaction started.
	www.kevinboone.com /ejb-transactions.html (3983 words)

	Embedded database transaction logging for real-time, embedded systems — persistence in the eXtremeDB in-memory database (Site not responding. Last check: 2007-10-11)
		Logging is performed through periodic checkpoints, where the image of the in-memory database is saved to persistent storage, and all intermediate changes to the database are written to the log files.
		A disk-based database, however, will perform many writes per transaction (data pages, index pages, transaction log, etc) and the larger the transaction and the more indexes that are modified, the more writes that are necessary.
		For example, transaction logging may be turned on or off at runtime and, when turned on, logging may be set to different levels of transaction durability, allowing system designers to make intelligent trade offs between performance and risk for unrecoverable transactions.
	www.mcobject.com /logging.shtml (455 words)

	Database Driver for SQL Server
		When a database table is first imported to a Prolifics repository, the new repository screen has one table view that is named after the database table.
		After the transaction is declared, its name is used to begin and to commit or to rollback the transaction.
		Use this command to rollback a transaction and restore the database to its state prior to the start of the transaction or at the time of the specified savepoint.
	www.prolifics.com /docs/panther/html/dbd_html/mss/mssnotes.htm (8808 words)

	Database transaction
		A database transaction is a unit of interaction with a Database management system or similar system that is treated in a coherent and reliable way independent of other transactions.
		A simple transactions is usually issued to the database system in a language like SQL in this form:
		Transactions are supported in some form or other in database systems like Mimer SQL, PostgreSQL, MySQL and Oracle.
	www.ebroadcast.com.au /lookup/encyclopedia/tr/Transaction.html (258 words)

	The Deadlock database acid transaction with blackboard transaction system and transaction management
		Transactions society of naval architects transaction control number integrity server transaction error 20014 benefits of transaction processing system bill of lading in international commercial transaction property transaction solicitors transaction processing system real estate transactions massachusetts.
		Real estate transactions in the slo county real estate transaction of edinburgh in indiana server is not configured for transactions international business transaction edi transaction sets.
		B2b transactions listed transactions life of an real estate transaction patellar transaction testing ssa boniva agreement transaction 408 into database server file protocol transaction transactions electronic transaction processing accounting for wholesale power transactions basic mortgage transaction free copy of a check transaction register maryland real estate sales closings transactions free.
	deadlock-database-acid-transaction.bekn.com (546 words)

	cse515: Database Transaction Processing Systems (Site not responding. Last check: 2007-10-11)
		Database transaction processing systems occupy a central position in our information-based society.
		Each concept introduced in the course is reinforced in a laboratory project where student groups are asked to use the transactional concept and analyze the consequences of its use in an application implementation.
		Databases and Transaction Processing: An Application Oriented Approach.
	www.cs.sunysb.edu /~cse515 (1103 words)

	Rapid Database Recovery with Differential Backups
		To recover the database to it's status at 9:30 we have to first restore the full database dump, then all the transaction log dumps from 1 am to 10 am, specifying "stop at 9:30" for the last (10 am) restore.
		Now to restore our database to it's state of play as at 9:30, we only have to restore 4 files, the full database dump, the differential, and then the transaction log backups from 9 am and 10 am.
		To restore the database to 5:30, all we need to restore is the original database dump, the second differential dump (remember, it includes the contents of the previous differential) and the 6 pm transaction log dump with a "stop at" parameter of 5:30.
	www.databasejournal.com /features/mssql/article.php/1437791 (805 words)

	#64984: Database transaction support for iCS (Site not responding. Last check: 2007-10-11)
		Normally, it writes the event into the attendee's calendar (this operation is a database transaction).
		Then, it updates the queue entry to reflect that the delivery to the attendee has been handled (this operation is a database transaction).
		Thus, unless the database file becomes physically corrupted, a server crash after the third attendee's calendar has been updated should not affect the net result of the group scheduling operation.
	sunsolve.sun.com /search/document.do?assetkey=1-9-64984-1 (680 words)

	Database Transaction Isolation Levels
		This method sets the transaction isolation level used for both database read and write operations on the database connections obtained from either an internal or external connection pool (see "Connection Pools"), for both internal transactions and external transactions as in the case of CMP.
		Although database transaction isolation applies to both read and write connections, the read is not performed as part of the transaction.
		However, from the perspective of database transaction isolation, there is a one-to-one relationship between transaction and database connection: that is, all database operations (including read operations) must use the same database connection in order to achieve a particular database transaction isolation level.
	www.oracle.com /technology/products/ias/toplink/doc/1013/MAIN/_html/uowadv015.htm (1489 words)

	Real-Time Database Transaction Scheduling (Site not responding. Last check: 2007-10-11)
		ABSTRACT: A real-time database system (RTDBS) can be defined as a database system which is designed to provide real-time response to the transactions of data-intensive applications, such as banking, stock market, and computer-integrated manufacturing.
		Efficient transaction scheduling algorithms are required to maximize the number of transactions satisfying their timing constraints.
		We evaluate the real-time performance of existing and developed transaction scheduling algorithms using both analytic methods and the simulation technique.
	www.cs.bilkent.edu.tr /~oulusoy/proj1.html (198 words)

	A database transaction log file grows unexpectedly in Microsoft Project Server 2002 and in Microsoft Project Server 2003
		SQL transactions may not be completed successfully and may start to roll back.
		The database transaction log may grow quickly because of the many changes that Microsoft Office Project Professional 2003 or Microsoft Project Professional 2002 and Microsoft Project Server 2003 or Microsoft Project Server 2002 record in the transaction log.
		Besides displaying the symptoms that are listed in the "Symptoms" section, SQL Server may mark databases that are suspect because of a lack of disk space for transaction log expansion.
	support.microsoft.com /default.aspx?scid=kb;en-us;871237 (417 words)

	VMTN Discussion Forums: VirtualCenter Database Transaction Log ... (Site not responding. Last check: 2007-10-11)
		I think there is a transaction that SQL can't halt and thus it never is able to truncate the log.
		The transaction log will not truncate until it reaches the beginning of the first file after you have backed up the transaction log in the database.
		The reason why it will not shrink the transaction log is because the transaction log pointer is still at the end of the transaction log but probably in the middle of the last allocated growth of the database.
	www.vmware.com /community/thread.jspa?threadID=14249 (464 words)

	Amazon.com: Database and Transaction Processing: Books: Philip M. Lewis,Arthur Bernstein,Michael Kifer (Site not responding. Last check: 2007-10-11)
		Databases and Transaction Processing provides a complete and clear explanation of the conceptual and engineering principles underlying the design and implementation of database and transaction processing applications.
		To illustrate both database and transaction processing concepts, a case study is carried throughout the book.
		Chapters are organized in a self-contained fashion, so with a bit of background in databases, reader can just read a chapter in isolation if she is interested in a topic.
	www.amazon.com /Database-Transaction-Processing-Philip-Lewis/dp/0201708728 (1598 words)

	Dictionary Database - TransAction Translators Limited (Site not responding. Last check: 2007-10-11)
		TransAction bears no responsibility for the use of this database.
		It is solely a means to information published by other organisations and individuals, the contents of which are entirely outside of our control.
		The use of this database confirms your acceptance of these conditions.
	www.transaction.co.uk /corpsite/linksandtools/dictionarydatabase.asp (197 words)

	Database Transaction Management
		A transaction may have multiple components, each components may be classified as a transaction in the database sense, e.g.
		SQL Server has savepoints which are markers in the midst of transactions so that the database can be rolled back to those points instead of the beginning of the transaction: e.g.
		HOLDLOCK -- Makes a shared lock more restrictive by holding it until the completion of a transaction (instead of releasing the shared lock as soon as the required table or data page is no longer needed, whether or not the transaction has been completed).
	www.is.cityu.edu.hk /staff/ismikeho/is4338/dmchap9.htm (1710 words)

	Uploading to a Database Transaction
		In the last part, we call SetAbort to abort the transaction, since the file element is blank.
		Once again we call SetAbort to abort the transaction if this condition is true.
		The next section deals with another condition to verify whether one or both of the textboxes are blank.
	www.mavweb.net /safileup/prog_g_transactdatabase.htm (546 words)

	Transaction processing / database - Overview - Fujitsu Siemens Computers (Site not responding. Last check: 2007-10-11)
		Enabling IT systems to reveal their full benefits when supporting the high-performance, highly efficient, secure and economical use of OLTP (online transaction processing) applications.
		Database systems that offer advanced, high-performance and cost-effective systems for providing critical eBusiness solutions.
		A powerful report is generated which can be used to create open or closed lists with flexible layouts.
	www.fujitsu-siemens.com /products/software/transaction_processing/index.html (118 words)

	Huge Database Transaction Log - dBforums
		But, the transaction log is of 18 Gig size.
		I dont have maintenance plan on this database except that it is backed up every week.
		But, I do wonder whether the size of the transaction log would effect the performance of queries on the main database.
	www.dbforums.com /showthread.php?t=972769 (245 words)

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