Embed Size (px)
Citation preview
Better answers
NonStop SQL/MXNonStop SQL/MXTransactional Queuing and Transactional Queuing and Publish/Subscriber ServicesPublish/Subscriber Services
Johannes KleinJohannes Klein
Robbert Van der LindenRobbert Van der Linden
2Presentation nameBetter answers
E-commerce and globalization forces businesses E-commerce and globalization forces businesses to automate back office procedures to sustain to automate back office procedures to sustain rapid growth and react in real-timerapid growth and react in real-time
Business processes often consist of up to 100 IT Business processes often consist of up to 100 IT transactiontransaction
Current back-office infrastructures and messaging Current back-office infrastructures and messaging subsystem are not prepared for the dramatic subsystem are not prepared for the dramatic increase in back-office transactions increase in back-office transactions
Back Office AutomationBack Office Automation
3Presentation nameBetter answers
The Zero Latency EngineThe Zero Latency EngineApplApplApplAppl
Adapters
ApplApplApplApplApplApplApplAppl TransactionProcessing
Monitors
DistributedObject
Manager
DatabaseGateways
MessageTransport
Service
Adapters
Ada
pter
s
Ada
pter
s
ApplApplApplAppl
WorkflowEngine
4Presentation nameBetter answers
Delivering on ZLEDelivering on ZLE
The Zero Latency Enterprise removesknowledge and processing latencies. At the heart of the Zero Latency Enterpriseis an active database with up-to-date data and up-to-date information on scheduling business processes.
5Presentation nameBetter answers
Active relational database Active relational database
High-performance relational queuing and High-performance relational queuing and publish/subscribe servicespublish/subscribe services
High-performance trigger services (second release)High-performance trigger services (second release) Tightly integrated into NonStop SQL/MX databaseTightly integrated into NonStop SQL/MX database High availability through process pair technologyHigh availability through process pair technology Scalability via partitioning and load balancingScalability via partitioning and load balancing Common transaction managementCommon transaction management Common audit trail and recovery managementCommon audit trail and recovery management
6Presentation nameBetter answers
Publish/SubscribePublish/Subscribe
Producers ConsumersChannel
publish subscribe
select * from stream(channel);insert into channel values(…);
7Presentation nameBetter answers
QueuingQueuing
Producers ConsumersQueue
dequeueenqueueselect * from ( delete from stream(queue)) as queue;
insert into queue values(…);
8Presentation nameBetter answers
Scalable Queuing ServicesScalable Queuing Services
Partitioned transactional queues Partitioned transactional queues data dependent routing data dependent routing load balancingload balancing online re-partitioningonline re-partitioning
Set-oriented queue access Set-oriented queue access mini-batch processing mini-batch processing hot spot avoidancehot spot avoidance
Integrated database and transaction supportIntegrated database and transaction support pre-fetch of operational datapre-fetch of operational data remove two-phase commit overhead remove two-phase commit overhead
9Presentation nameBetter answers
Scalable Queuing ServicesScalable Queuing Services
Clients Queue Server Classes
Partition A
Partition C
Partition B
Operational Data
Enqueues routed by range or hash partitioning function
Server class per partitiondequeues and processes
requests
Dequeue, update of operational data, enqueue of reply is done in
single local transaction
10Presentation nameBetter answers
Core ConceptsCore Concepts
Stream access modeStream access mode stream access to subscribe and wait for qualifying stream access to subscribe and wait for qualifying
tuples to appear in SQL tabletuples to appear in SQL table Skip conflict access modeSkip conflict access mode
skip conflict to skip tuples locked by concurrent skip conflict to skip tuples locked by concurrent transactions in conflicting modetransactions in conflicting mode
Embedded update and deleteEmbedded update and delete embedded delete and update to read and at the embedded delete and update to read and at the
same time delete or update tuplessame time delete or update tuples
11Presentation nameBetter answers
SQL/MX Queuing ExampleSQL/MX Queuing Example
------- create table to capture orderscreate table orders (customerno int, itemno int, … );
-- dequeue orders and retrieve associated customer recordsselect * from (delete from stream(orders)) as orders left join customer on orders.customerno = customer.customerno;
12Presentation nameBetter answers
SQL/MX View ExampleSQL/MX View Example
--- define view for dequeuingcreate view ready_tasks as select * from (update stream(tasks) set state = ‘closed’ where state = ‘open’) as tasks, workflow where workflow.wfid = task.wfid;
--- dequeue entriesselect * from ready_tasks for skip conflict access;
13Presentation nameBetter answers
Application InterfacesApplication Interfaces
SQL/MX queuing and publish/subcribe SQL/MX queuing and publish/subcribe services are accessible via embedded SQL services are accessible via embedded SQL and ODBCand ODBC
Queuing and publish/subscribe services are Queuing and publish/subscribe services are accessible from NonStop DOM, NonStop accessible from NonStop DOM, NonStop Tuxedo, iTP WebServer and Pathway Tuxedo, iTP WebServer and Pathway
XML support and HTTP integrationXML support and HTTP integration
14Presentation nameBetter answers
SQL/MX Queuing FeaturesSQL/MX Queuing Features STREAMS STREAMS EMBEDDED DELETES AND UPDATESEMBEDDED DELETES AND UPDATES SKIP CONFLICTSKIP CONFLICT PARTITIONED TABLESPARTITIONED TABLES SET ON ROLLBACKSET ON ROLLBACK ROWSETSROWSETS HOLDABLE CURSORSHOLDABLE CURSORS VIEW SUPPORTVIEW SUPPORT ORDER BY / INDEXESORDER BY / INDEXES
