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Topic: Transaction


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  ACID Transactions: Tech Library: Products: NuSphere
Transactions always operate on a consistent view of the data and when they end always leave the data in a consistent state.
The effects of concurrently running transactions are invisible to this transaction, and the effects of this transaction are invisible to others until the transaction is committed.
Until the transaction commits, not only are any changes made by that transaction not durable, but are guaranteed not to persist in the face of a system failure, as crash recovery will rollback their effects.
www.nusphere.com /products/library/acid_transactions.htm   (337 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 - a definition from Whatis.com   (Site not responding. Last check: 2007-10-05)
In computer programming, a transaction usually means a sequence of information exchange and related work (such as database updating) that is treated as a unit for the purposes of satisfying a request and for ensuring database integrity.
For a transaction to be completed and database changes to made permanent, a transaction has to be completed in its entirety.
The order transaction involves checking an inventory database, confirming that the item is available, placing the order, and confirming that the order has been placed and the expected time of shipment.
searchcio.techtarget.com /sDefinition/0,,sid19_gci213213,00.html   (335 words)

  
 Maxprog | Transaction - Online sales analysis and reporting tool
Transaction is an easy-to-use, full featured and multi-purpose interactive data analysis and reporting tool intended to help you control your online sales.
Transaction uses a state-of-the-art fast SQL engine with user-defined smart lists so your reports and charts can be tailored to include all your products, user-defined product categories or only ones meeting specified criteria.
Transaction doesn't use technical jargon making it much easier to be used by people with very little or no computing knowledge at all.
www.maxprog.com /Transaction.html   (480 words)

  
 Transaction Processing
A system that uses transactions can be thought of as a collection of objects or data resources with a persistent state that satisfies a set of integrity constraints.
The effects of transactions that were in committed state at the time of the system failure must be incorporated into the data.
Note that transactions that were active when the failure occurs are considered aborted since their internal state is lost due to the failure.
www.cse.scu.edu /~jholliday/transproc.html   (2279 words)

  
 A transaction log grows unexpectedly or becomes full on a computer that is running SQL Server
This causes the transaction to remain open for a long time, which causes blocking and transaction log growth because the open transaction cannot be truncated and new transactions are added to the log after the open transaction.
Transactions that affect the objects that are replicated are marked as "For Replication." These transactions, such as uncommitted transactions, are not deleted after checkpoint or after you back up the transaction log until the log-reader task copies the transactions to the distribution database and unmarks them.
The transaction log for any database is managed as a set of virtual log files (VLFs) whose size SQL Server determines internally based on the total size of the log file and the growth increment in use when the log expands.
support.microsoft.com /?id=317375   (2325 words)

  
 INF: Causes of SQL Transaction Log Filling Up
Any transaction must be completely atomic (that is, functionally indivisible) in that all changes must be either applied or not applied, even in the event of a system failure.
Transaction not committed due to blocking: In a multi-user environment it is possible for an open transaction to become blocked on locks held by another process.
If the transaction in the user db is halted for any reason, including a blocking lock, or the application not processing dbnextrow() to completion, the transaction in tempdb will likewise be left open, preventing tempdb log truncation.
www.support.microsoft.com /?id=110139   (2706 words)

  
 Transaction (Java 2 Platform Ent. Ed. v1.4)
The Transaction interface allows operations to be performed against the transaction in the target Transaction object.
Rollback the transaction represented by this Transaction object.
Modify the transaction associated with the target object such that the only possible outcome of the transaction is to roll back the transaction.
java.sun.com /j2ee/1.4/docs/api/javax/transaction/Transaction.html   (632 words)

  
 JDO JavaDoc: Interface Transaction
Transaction options include whether optimistic concurrency control should be used for the current transaction, whether instances may hold values in the cache outside transactions, and whether values should be retained in the cache after transaction completion.
The type of transaction is determined by the setting of the Optimistic flag.
Additionally, fields of modified instances of primitive types and immutable reference types are restored to their values as of the beginning of the transaction.
java.sun.com /products/jdo/javadocs/javax/jdo/Transaction.html   (567 words)

  
 C++ in Action Book: Techiques
A transaction is a series of operations that move the program from one well defined state to another.
Once the transaction is committed, the object changes its state to committed and its destructor doesn't unroll anything.
When the system comes up again, we have to find all the interrupted transactions (they have to leave some trace on disk) and do one of two things: if the transaction was interrupted before it had a chance to commit, we must unroll it; otherwise we have to complete it.
www.relisoft.com /book/tech/8trans.html   (3189 words)

  
 New paradigms for transaction processing
Whereas in the past, the operator of a transaction processing system acted in a programmed way as the interface between the world and the computer system, BPR has required such operators to make more independent decisions based on sources of data wider than that available from the traditional one function transaction processing system.
A transaction processing system which allows its operator to choose what task is done next as often as possible is thought better than one which restricts future actions based on past actions.
Using email technology (and transaction systems based on email technology), the operator chooses an enquiry type and waits while the local personal computer responds with an enquiry "form", the operator enters the enquiry data and "sends" the form as a mail message to the transaction processing system.
www.csse.monash.edu.au /~cavram/papers/tp/tr94-02h.html   (4449 words)

  
 ONJava.com -- J2EE Transaction Frameworks, Part 3
Since transactions are viewed as a property of the overall application, it's easier an application assembler who understands the application to customize the transaction attributes in the deployment descriptor to change the application behavior.
Transaction attributes must not be specified for the methods of a session bean's home interface.
Typically the transaction manager is instructed by the container to mark the transaction for rollback.
www.onjava.com /pub/a/onjava/2001/06/06/j2ee_trans.html   (878 words)

  
 Transaction Publishers
TRANSACTION is honored to have worked with Peter Drucker, an extraordinary scholar, writer, and public servant and to have served as his primary publisher of new editions of his classic social science writings for the past 13 years.
TRANSACTION is honored to have already reissued 4 significant works by Peter Viereck, with new introductions by the author or others, and one more is due out soon.
Transaction looks forward to meeting you and your colleagues at a number of events at which we will be exhibiting during the next several months.
www.transactionpub.com   (1259 words)

  
 Transaction Management
The internal transaction table for the associated rollback segment records that the transaction has committed, and the corresponding unique system change number (SCN) of the transaction is assigned and recorded in the table.
A COMMIT statement denoting the end of a transaction automatically triggers the two-phase commit mechanism to commit the transaction; no coding or complex statement syntax is required to include distributed transactions within the body of a database application.
Autonomous transactions are useful for implementing actions that need to be performed independently, regardless of whether the calling transaction commits or rolls back, such as transaction logging and retry counters.
www.cs.umbc.edu /help/oracle8/server.815/a67781/c15trans.htm   (2243 words)

  
 EZPDO » Transactions
A transaction is a logical unit of work, a consistent and reliable portion of the execution of a program.
Transactions also support concurrent accesses to persisted EZPDO objects by preventing one process’s updates from interfering with another process’s reads or updates.
In other words, a transaction’s changes to persistent data are private and invisible to other processes until the entire transaction completes successfully, and other processes’ changes to persistent data are invisible to this transaction.
www.ezpdo.net /blog/2005/07/18/trans   (457 words)

  
 Transaction Net: How Currency Systems Work (a Money Map)
We present here an overview of the design characteristics of some representative currency systems, all of which are explained in further detail in our glossary of important terms and concepts and under discussion in The Money Conference.
Sufficient currencies (not to be confused with overabundant inflated currencies) are exemplified by mutual credit systems such as LETS and Time Dollars, which are created as a debit and credit by the participants themselves at the moment of a transaction and thus always in sufficient supply.
Currencies with demurrage charges discourage hoarding and thus encourage transactions and cooperation among participants.
www.transaction.net /money   (415 words)

  
 Transaction Control (Building Distributed Applications)   (Site not responding. Last check: 2007-10-05)
A local transaction is one whose scope is a single transaction-aware data resource, such as a Microsoft® SQL Server™ database or MSMQ message queue.
There is no built-in support for distributed transactions and so it will be a lot of responsibility if you choose to control a distributed transaction manually; you will need to control every connection and resource enlistment, and provide implementation to maintain ACID properties of the transaction.
Wrapping the code in a try/catch/finally block ensures that your transaction executes correctly; the transaction is committed at the very end of the try block when both the commands have been executed successfully.
msdn.microsoft.com /library/en-us/dnbda/html/bdadotnettransact1.asp?frame=true   (2600 words)

  
 Commons¬†Transaction - Overview
Commons Transaction aims at providing lightweight, standardized, well tested and efficient implementations of utility classes commonly used in transactional Java programming.
The optimal - but maybe impudent - long term goal would be to create the transactional counterpart of Doug Lea's fabulous concurrent package which recently made it to Java 5.0.
Depending on the type of the map that is wrapped this can either work as a transactional cache or some sort of volatile memory store.
jakarta.apache.org /commons/transaction   (205 words)

  
 Transaction IDs in DB2
This identifier is needed to guarantee the durability of all database transactions in case of expected or unexpected interruption of the operation, such as a system failure.
Given that a single log (possibly split into several files) is used by the database engine for all concurrent transactions, many or all of which could make data modifications and cause log records to be written concurrently, it is necessary to find a log record that really belongs to the current transaction.
The transaction ID is returned by the stored procedure as a string, that is, a value of type CHAR(12).
www-128.ibm.com /developerworks/db2/library/techarticle/dm-0505stolze2   (2061 words)

  
 Chapter 8. Transaction management
However, there are several options specifying behavior if a transactional method is executed when a transaction context already exists: For example, simply running in the existing transaction (the most common case); or suspending the existing transaction and creating a new transaction.
XML-based transaction attribute sources definitions are convenient, and work in any environment, but if you are willing to commit to a dependency on Java 5+ (JDK 1.5+), you will almost certainly want to consider using Spring's support for transaction Annotations in JDK standard format, as the attribute source instead.
Declaring transaction semantics directly in the Java source code puts the declarations much closer to the affected code, and there is generally not much danger of undue coupling, since typically, code that is deployed as transactional is always deployed that way.
www.springframework.org /docs/reference/transaction.html#d0e4491   (5107 words)

  
 Transaction Processing   (Site not responding. Last check: 2007-10-05)
The purpose of your program is to check that each transaction balances, and to report it if it doesn't.
A transaction consists of between two and ten entries with identical sequence numbers.
The last entry in the report is one you will create to make the transaction balance, using the special account number 999 (the suspense account).
acm.uva.es /p/v1/187.html   (380 words)

  
 Microsoft Transaction Server 2.0 and COM Transaction Integrator 1.0
A transaction is an atomic unit of work: either all the actions in a transaction are committed or none of them are.
LU 6.2 is the de facto standard for distributed transaction processing in the mainframe environment and is used by both CICS and IMS subsystems.
The Distributed Transaction Coordinator (DTC) is the part of MTS responsible for ensuring that all work within a transaction context is either committed or rolled back as an atomic unit of work, by implementing the two-phase commit protocol.
www.microsoft.com /technet/archive/transsrv/mtscomti.mspx   (4568 words)

  
 Corporate Development Officer (CDO) Corner - Transaction Advisory Services - Ernst & Young   (Site not responding. Last check: 2007-10-05)
These are invaluable reports for those in the transaction community, and are available here in the CDO Corner.
Effective transactions are based on understanding the sources of value, or synergies, in a deal.
The first Executive Briefing to come from our CDO Study, "Striving for Transaction Excellence: Emergence of the Corporate Development Officer" (pdf, 170k) looks at the role of the CDO and how it is evolving into the key figure responsible for transaction execution and a broad range of related corporate functions.
www.ey.com /global/content.nsf/US/TAS_-_CDO   (670 words)

  
 transaction processing - Internetnews.com - Webopedia.com
The opposite of transaction processing is batch processing, in which a batch of requests is stored and then executed all at one time.
Transaction processing requires interaction with a user, whereas batch processing can take place without a user being present.
From Transaction Information Systems, this page provides links to an overview of transaction processing, as well as to their Level 8 Systems product.
inews.webopedia.com /TERM/T/transaction_processing.html   (168 words)

  
 Purveyor Administrator's Guide - Web Proxy Servers
When using a proxy server it is possible to filter client transactions at the protocol level.
When a browser sends a request through a proxy server, the browser always uses HTTP for the transactions with the proxy server.
The only difference between a normal and proxied HTTP transaction is that HTTP transactions routed through a proxy server require a full URL.
vms.process.com /~help/helpproxy.html   (2134 words)

  
 Adobe - Adobe to acquire Macromedia
Investors and security holders may obtain free copies of these documents (when they are available) and other documents filed with the SEC at the SEC's web site at www.sec.gov.
Adobe, Macromedia and their directors and executive officers may be deemed to be participants in the solicitation of proxies from the stockholders of Adobe and Macromedia in connection with the merger transaction.
Additional information regarding the directors and executive officers of Adobe is also included in Adobe's proxy statement for its 2005 Annual Meeting of Stockholders, which was filed with the SEC on March 14, 2005.
www.adobe.com /aboutadobe/invrelations/adobeandmacromedia.html   (573 words)

  
 Transaction 1.3 – Mac OS X – VersionTracker   (Site not responding. Last check: 2007-10-05)
Notify me when Transaction is updated on VersionTracker.
You can now have access to multiple databases moving it to the application folder.
Transaction Import issue when lot of columns (>30).
www.versiontracker.com /dyn/moreinfo/macosx/25927   (268 words)

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