Introducing #liveDB

Introducing liveDB,[object Object],Build faster systems faster,[object Object],Robert Friberg, robert@devrex.se,[object Object],Twitter: @robertfriberg, @livedomain, #livedb,[object Object],http://livedb.devrex.se/,[object Object]

Disk,[object Object],.NET Process Memory,[object Object],Command,[object Object],serialization,[object Object],Engine,[object Object],Clients,[object Object],Client,[object Object],Transaction Log,[object Object],Client,[object Object],Pass queries and,[object Object],commands,[object Object],Snapshot.0,[object Object],Synchronized execution,[object Object],Snapshot.1,[object Object],In-memory,[object Object],Object,[object Object],Model,[object Object],Prevalent System Architecture,[object Object],Snapshot.N,[object Object]

The prevalent hypothesis,[object Object],Your data will fit in available RAM,[object Object],99% of all OLTP database are 1TB or less--Stonebraker, VoltDB,[object Object]

Eric Schmidt, Google CEO,[object Object],At Google we found it costs less money and it is more efficient to use DRAM as storage as opposed to hard disks.,[object Object],Three minutes with Google's Eric Schmidt , CNN.COM,[object Object]

What is liveDB?,[object Object],A native .NET in-memory database engine,[object Object],Full ACID support,[object Object],Embedded engine free to use for any purpose,[object Object],Supports any data representation,[object Object]

The NoSQL revolution,[object Object],RDBMS paradigm is shaking,[object Object],Alternative data representation, document, graph, key/value, etc,[object Object],Support large scale databases,[object Object],LiveDB focuses on,[object Object],Memory vs. Disk,[object Object],Freedom of representation,[object Object],Facebook is not the common case,[object Object]

Relational Database Prison,[object Object],Relational model formulated 1969,[object Object],Designed to address limitations non-existent today – disk access,[object Object],A relational model is just one of many possible datarepresentations,[object Object],Primitive stored procedure language,[object Object],O/R Mapping adds to the pain,[object Object]

O/R mapping vs Command/Query pattern,[object Object],O/R mapping is based on CRUD pattern,[object Object],CRUD is a specialization of Request/response,[object Object],Command/Query is more general (superset),[object Object],You can do CRUD with Command/Query but not the other way around,[object Object]

Business arguments,[object Object],Reduced time to market,[object Object],Lower TCO for software systems,[object Object],Reduced development time up to 40%,[object Object],Operations (no rdbms),[object Object],Licensing (no rdbms),[object Object],Faster systems,[object Object]

Developer benefits,[object Object],Model is pure .NET types and collections,[object Object],representational freedom,[object Object],DAL and downwards is eliminated,[object Object],No object/relational mapping,[object Object],No relational modeling,[object Object],No T-SQL programming,[object Object],Debugging,[object Object],Version control,[object Object],Supports DDD, TDD,[object Object]

Start your engines!,[object Object],var db = Engine.Load<MyModel>(path);,[object Object],db.Execute(command);,[object Object],var c = db.Execute(m => m.Customers.GetById(42));,[object Object],...,[object Object],var cmd = SetPasswordCommand(c.Id, newPassword);,[object Object],db.Execute(cmd);,[object Object],db.Close();,[object Object]

Demo!,[object Object],http://roxsux.devrex.se/,[object Object],Coding a simple model,[object Object],Commands and queries,[object Object],Hosting the engine,[object Object],See blog for more info: http://livedb.devrex.se/,[object Object]

Drawbacks,[object Object],Model must fit in RAM,[object Object],Load time (start up and rollback),[object Object],Versioning issues,[object Object],.NET Only (Json possible),[object Object],No magical indexing (yet),[object Object]

Gotchas,[object Object],No external dependencies from commands,[object Object],Don’t modify the model with query,[object Object],Rollback is expensive,[object Object],Don’t manipulate model out of context,[object Object],Dont rely on reference equality,[object Object],Results are not direct references,[object Object]

References,[object Object],Prevalent System Architecture,[object Object],prevayler.org, java project from 2003, alive and kicking,[object Object],Bamboo.Prevalence .NET 1.1, dead project?,[object Object],VoltDB,[object Object]

Thank you!,[object Object],Robert Friberg, Devrex,[object Object],Twitter: @robertfriberg, @livedomain, #livedb,[object Object],http://livedb.devrex.se/,[object Object]

Introducing #liveDB

Introducing #liveDB

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