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DVD > XA
The following information is about XA.
XA Defined
DC-X Honored for Its Contributions, Potential
Published September 1, 2008, 6:02 am, SPACE.com via Yahoo! News
ALAMOGORDO, N.M. — Creating routine, aircraft-like, low-cost access to space is not only technologically challenging, it will require enormous tenacity to overcome the inevitable bureaucratic, political and funding hiccups. These are just a few of the lessons learned by veterans of the Delta Clipper-Experimental (DC-X) rocket ship program. ...
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Off-site XA Links, User Submitted
The following links have been collected through user bookmark submission in the XA category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
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- Managing Distributed Transactions
- Nati Shalom's Blog: Lessons from Pat Helland: Life Beyond Distributed Transactions: In order to avoid distributed transactions you must: * Create/rearran ge your object model using entities (objects with IDs), in a such a way that most of your state changes will happen inside the boundaries of a single entity. a change to a single entity is atomic. * For those changes that exceed the boundaries of one entity, changes will not be atomic and the final desired change will be achieved using a sequence of atomic changes, every change request (activity) MUST be implemented to be idempotent because of the chance of retransmitting due to failures. * To accomplish idem-potency of your activities (actions/metho ds) the entity itself SHOULD hold a history of committed activities per source(entity) .
- An Army of Solipsists " Blog Archive " A Grails Plugin for Multiple DataSources
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- Transactional File I/O: The Transactional File I/O library provides an XA resource manager for file system access, allowing file operations to participate fully in transactions with databases or messaging systems.
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