OrientDB the database for the web 1.1

www.orientechnologies.com

The database for the Web

Why do I need another
DBMS?


But the question is:
are DBMSs ready for
the Web age?

Web means:
Hundreds of users today,
thousands or
millions tomorrow


Web means:
Idea → Demo in few weeks


Web means:
Fast and frequent
changes of requirements and
data structures


Web means:
+ social + relationships
+ interconnections
= graph


Web means:
Low usage of resources
run on cheap hardware


Web means:
Speak HTTP, REST and JSON
please


Why is the database
so important
in modern applications?


Because
modern applications
are mostly I/O Bound
not
CPU bound

NoSQL
= “Not Only SQL”
= make the best choice for your
use case


Can I trust
new DBMSs?

Non exhaustive list of NoSQL products:

AllegroGraph, Amazon SimpleDB, Amazon
Dynamo, Dynomite, BerkleyDB, Google BigTable,
Cassandra, CouchDB, DB4O, Hbase, Hipertable,
Hive, Jackrabbit, InfiniteGraph, InfoGrid,
Memcached, MemcacheDB, Mnesia, M/DB/DT.M,
MongoDB, Neo4J, OrientDB, Pig, Project
Voldemort, RavenDB, Redis, Riak, Scalaris,
Sesame, Sones, Terrastore, Tokyo Cabinet/Tyrant,
Yahoo! Pnuts/Sherpa

“NoSQL container” groups so
very-very-very
different products,
no standard,
difficult to choice,
difficult to learn them


Can I have a
Fast, scalable, flexible
storage
with ACID Tx, SQL, Security
easy to use and maintain?


The fastest NoSQL document-graph dbms


+12 years
of research


+1 year
of design and develop


=
best features of newest NoSQL solutions
+
best features of Relational DBMS
+
new ideas and concepts

Ø config
download, unzip, run!
cut & paste the db

No dependencies
rd
with 3 parties software
no conflicts with other software
just 1 Mb of run-time libraries


150,000
records per second


Schema-less
schema is not mandatory, relaxed model,
collect heterogeneous documents all together


Schema-full
schema with constraints on fields and validation rules
Customer.age > 17
Customer.address not null
Customer.surname is mandatory
Customer.email matches 'b[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]{2,4}b'


Schema-mixed
schema with mandatory and optional fields + constraints
the best of schema-less and schema-full modes


ACID Transactions
db.begin();

try{
// your code
...
db.commit();

} catch( Exception e ) {
db.rollback();
}


Complex types
collections, maps (key/value)
native support for
and embedded documents
no more additional tables to handle them


Relationships
are direct links
no Relational JOINS to connect multiple tables
Load trees and graphs in few ms!


SQL
select * from employee where name like '%Jay%' and status=0


For the most of the queries
everyday a programmer needs
SQL is simpler,
more readable and
compact then
Scripting (Map/Reduce)


SELECT SUM(price) as prices, SUM(cost) as costs, prices-costs, margin/price
FROM Balance

VS
function (key, values) {
var price = 0.0, cost = 0.0, margin = 0.0, marginPercent = 0.0;
for (var i = 0; i < values.length; i++) {
price += values[i].price;
cost += values[i].cost;
}
margin = price - cost;
marginPercent = margin / price;
return {
price: price,
cost: cost,
margin: margin,
marginPercent: marginPercent
};
}

Asynchronous Query
invoke callback when a record matches the condition
doesn't collect the result set
perfect for immediate results
useful to compute aggregates


®
runs
Java
everywhere is available JRE1.5+
robust engine


Language bindings
Java as native
JRuby, Scala and Javascript ready
C, C++, Ruby, Node.js in progress


Your language is
not supported (yet)?
Write an adapter using the
C, Java or HTTP binding


HTTP RESTful
firewall friendly
use it from the webbrowser
use it from the ESB (SOA)


Native JSON
{
'@rid' = '26:10',
'@class' = 'Developer',
'name' : 'Luca',
'surname' : 'Garulli',
'company' : '19:76'
}


Import/Export
uses JSON format
online operations (don't stop the database)


Binary protocol
Fast compressed JSON over tcp/ip
available for Java
and soon C, C++ and Ruby


RB+Tree index
the best of B+Tree and RB-Tree
fast on browsing, low insertion cost
It's a new algorithm (soon public)


OO Inheritance
Definition of Classes of documents
Classes can extend others classes
Queries are polymorphics
Contact
name : string
surname : string

Customer Provider
orders : List<Order> products : List<Product>

Hooks
similar to triggers
catch events against records, database and transactions
implement custom cascade deletion algorithm
enforce constraints


Fetch plans
Choose what to fetch on query and document loading
Documents not fetched will be lazy-loaded on request
Invoice
3:100
|
| customer
+---------> Customer
| 5:233
| city country
+---------> City ---------> Country
| 11:2 12:3
| orders
+--------->* [OrderItem OrderItem OrderItem]
[ 8:12 8:19 8:23 ]

Security
users and roles, encrypted passwords
fine grain privileges


4 storage modes
embedded
client/server
distributed
in-memory


Embedded mode
really fast
runs in the same JVM of the application,
less resources, no tcp/ip used


Client/server mode
client and server are separated JVMs
thousands of clients concurrently
remote tcp/ip binary transport


Distributed mode
distribute database clusters on
multiple servers (in alpha status)


In-memory mode
Database lives only in memory
No disk is used
Destroyed at shutdown


User API
Document Database

Key/Value Database Graph Database

Object Database


Document Database
the base of all DB implementations
documents have dynamic structure
something like a smart Map<String,Object>


Open the database
ODatabaseDocumentTx db = new ODatabaseDocumentTx( "remote:localhost/demo" );

db.open("admin", "admin");

try{

…

} finally { Open the database 'demo'
db.close(); from a remote server
}


Create a document
ODocument doc = new ODocument( db, "Person" );

doc.field( "name", "Luke" ); Relationship
doc.field( "surname", "Skywalker" );

doc.field( "city", new ODocument("City" ).fields("name","Rome") );

doc.save();


SQL Query
List<ODocument> result = db.query(
new OSQLSynchQuery( "select * from person where city.name = 'Rome'" ) );

for( ODocument d : result ) {
System.out.println( "Person: " + d.field( "name" ) + d.field( "surname" ) );
}


Native Query
List<ODocument> result = new ONativeSynchQuery<ODocument,
OQueryContextNativeSchema<ODocument>>(
db, "Profile", new OQueryContextNativeSchema<ODocument>()) {

@Override
public boolean filter(OQueryContextNativeSchema<ODocument> iRecord) {
return iRecord.field("city").field("name").eq("Rome").and().field("name").like("G%").go();
};

}.setLimit(20).execute();


Update a document
new OSQLSynchQuery( "select * from person where city.name = 'Rome'"));

d.field( "local", true );
d.save();
}

// IT'S THE SAME OF:
int changed = db.command(
new OSQLCommand( "update person set local = true where city.name = 'Rome'"))
.execute();


Delete a document
new OSQLSynchQuery( "select * from person where city.name = 'Rome'" ) );

d.delete();

// IT'S THE SAME OF:
int deleted = db.command(
new OSQLCommand( "delete person where city.name = 'Rome'")).execute();


from/to JSON
// EXPORT JSON
System.out.println( document.toJSON() );

// IMPORT JSON
document.fromJSON( “{ '@class' = 'Developer',
'name' : 'Luca',
'surname' : 'Garulli' }” );
document.save();


Use hooks (triggers)
public class HookTest extends ORecordHookAbstract {
public saveProfile(){
ODatabaseObjectTx database = new ODatabaseObjectTx("remote:localhost/demo");
database.open("writer", "writer");

database.registerHook(this);

...
}

@Override
public void onRecordAfterCreate(ORecord<?> iRecord){
System.out.println("Record created successfully");
}
}


Key/Value Database
bucket / key / value
HTTP RESTful protocol
Hazelcast plug-in to distribute database


Key/Value = RB+Tree
works mainly using RB+Tree custom indexes
sort of Map<String,Map<String,Record>>


Object Database
wrapper on top of Document Database
binds POJO from/to the database
no OR-Mapping complexity
no enhancement, no Java Proxies


POJO mapping
Uses the reflection to bind POJO fields
at start-up caches reflection meta-data
1-to-1 binding
configurable options by @annotations


Open the database
ODatabaseObjectTx db = new ODatabaseObjectTx( "remote:localhost/demo" );

db.open("admin", "admin");

try{

… Same usage of Document
Database, but the class
} finally { is different
db.close();
}


Create a persistent POJO
Person person = new Person();

person.setName( "Luke" );
Relationship
person.setSurname( "Skywalker" );

person.setCity( new City( "Rome" ) );

db.save( person );


Polymorphics SQL Query
List<Person> result = database.query(
new OSQLSynchQuery("select from person where city.name = 'Rome'"));

Queries are polymorphics
and subclasses of Person can be
part of result set
for( Person p : result ) {
if( p instanceof Customer )
System.out.println("Customer: " + p.getName() + “ “ + p.getSurname() );
}


Graph Database
wrapper on top of Document Database
Few simple concepts: Vertex, Edge,
Property and Index


Example of a Graph


TinkerPop technologies
sort of “standard” for GraphDB
a lot of free open-source projects

http://tinkerpop.com


TinkerPop Blueprints
basic API to interact with GraphDB
implements transactional and
indexable property graph model
bidirectional edges


GraphDB & Blueprints API

OrientGraph graph = new OrientGraph("local:/tmp/db/graph”);

Vertex actor = graph.addVertex(null);
actor.setProperty("name", "Leonardo");
actor.setProperty("surname", "Di Caprio");

Vertex movie = graph.addVertex(null);
movie.setProperty("name", "Inception");

Edge edge = graph.addEdge(null, actor, movie, "StarredIn");

graph.shutdown();


TinkerPop
scripting language
easy to learn and understand
Used for operations against graphs


Graph example
graph-example-1.xml


Load graph
Run the console, open the database and load a graph in xml format

marko:~/software/gremlin$ ./gremlin.sh

,,,/
(o o)
-----oOOo-(_)-oOOo-----

gremlin> $_g := orientdb:open('/tmp/graph/test')
==>orientgraph[/tmp/graph/test]

gremlin> g:load('data/graph-example-1.xml')
==>true

gremlin> $_g
==>orientgraph[/tmp/graph/test]

Search
Displays outgoing edges of vertices with name equals to 'marko',
then the name of inbound vertices

gremlin> g:key-v('name','marko')/outE
==>e[6:0][5:2-knows->5:1]
==>e[6:1][5:2-knows->5:4]
==>e[6:4][5:2-created->5:0]

gremlin> g:key-v('name','marko')/outE/inV/@name
==>vadas
==>josh
==>lop

gremlin> g:close()
==>true

API resume
object, key/value and graph elements all work on top of Document

you can always access to the underlying document

changes to the document are reflected to the
object, key/value and graph elements
and viceversa


High-Availability
Cluster of distributed server nodes
Synchronous, Asynchronous and Read-Only
replication
Load-balancing between client ↔ servers and
Servers ↔ Servers


Synchronous scenario
Server #1 owns all the data, used for reads/writes
Server #2 is the backup replica, can be used for reads
Clients receive ack only when both are updated
Server #1 and #2 are Always Consistent

Client A Client B Client A Client B

Server #1 Server #2
(Leader+Owner) (Synchronous)

DB DB


Asynchronous scenario
As for synchronous, but:
Server #2 is Eventually Consistent
Clients receive ack just when Server #1 is updated


Server #1 Server #2
(Leader+Owner) (Asynchronous)
update-delay=x

DB DB


Fail-over
Server #1 logs changes while Server #2 is disconnected
Transparent client switch to good servers (alpha status)
Running transactions will be repeated transparently (v0.9.26)


Server #1 Server #2
(Leader+Owner) (Asynchronous)
Log
changes

DB DB


Mixed scenario
Strict Consistency is acceptable
Use Server #1 and #2 for cases when
Use Server #3 for cases when Eventually Consistency is acceptable

Server #1
(Leader+Owner)
Server #2 Server #3
(Synchronous) update-delay=0 (Asynchronous)
DB

DB DB


Partitioning
Cluster level granularity
Place the “owner” close to the clients to reduce latency

Server main Server USA
(Leader)

Customers
Customers
Europe
Asynchronous (update-delay=0) Europe
(owner)

Customers
Customers
Asynchronous (update-delay=0) USA
USA
(owner)


Real world scenario I
Distribute data across multiple sites
Play with sync/asynch+delay
Keep synchronous copies close and propagate in asynch
Customers
Server Farm Europe USA
Server China
(Owner) Customers
Customers Asia
USA Server Main China Copy
(Synchronous) Customers
(Owner) Asynchronous Europe
Customers
Asia propagation
Main Copy
Customers (Synchronous)
Europe Customers
Server USA USA
(Owner)
Customers
Asia
USA Copy
(Synchronous) Customers
Europe


Real world scenario II
Put server nodes in chain
Load-balance requests
China East
Server Copy Read-only
(Synchronous)
China West
Read-only

Server China China North
(Asynchronous) Read-only
Server Main
(Leader-Owner)
Server USA USA South
(Asynchronous) Read-only

Canada
Update European Customer: Read-only
Propagate the change

Choose the best strategy
for your use-case

Server Copy Client B
(Synchronous)
consistent reads, Client D
delegated writes ev. consistent reads,
no writes

Server Main Server China China North
(Leader-Owner) (Asynchronous) Read-only

Client A Client C
consistent reads, ev. consistent reads,
direct writes delegates writes


Enhanced SQL
SQL is not enough for collections, maps, trees and graphs
need to enhance SQL syntax
Easy syntax derived from JDO/JPA standards


SQL & relationships
select from Account where address.city.country.name = 'Italy'

select from Account where addresses contains (city.country.name = 'Italy')


SQL & trees/graphs
select from Profile where friends traverse(0,7) ( sex = 'female' )

(Soon new specific operators for trees and graphs)


SQL & strings
select from Profile where name.toUpperCase() = 'LUCA'

select from City where country.name.substring(1,3).toUpperCase() = 'TAL'

select from Agenda where phones contains ( number.indexOf( '+39' ) > -1 )

select from Agenda where email matches 'bA-Z0-9._%+-?+@A-Z0-9.-?+.A-Z?{2,4}b'


SQL & conversions
select from Shapes where area.toFloat() > 3.14

select from Agenda where birthDate.toDateTime() > '1976-10-26 07:00:00'

select from Workflow where completed.toBoolean() = true


SQL & schema-less
select from Profile where any() like '%Jay%'

select from Stock where all() is not null


SQL & collections
select from Tree where children contains ( married = true )

select from Tree where children containsAll ( married = true )

select from User where roles containsKey 'shutdown'

select from Graph where edges.size() > 0


SQL & documents
select from Vehicle where @class = 'Car'

select from Friend where @version > 100

select from File where @size > 1000000


Console
ORIENT database v.0.9.23 www.orientechnologies.com
Type 'help' to display all the commands supported.

> connect remote:localhost/demo admin admin
Connecting to database [remote:localhost/demo] with user 'admin'...OK

> select from profile where nick.startsWith('L')
---+--------+--------------------+--------------------+--------------------+
#| REC ID |NICK |SEX |AGE |
---+--------+--------------------+--------------------+--------------------+
0| 10:0|Lvca |male |34
1| 10:3|Leo |male |22
2| 10:7|Luisa |female |27
3 item(s) found. Query executed in 0.013 sec(s).

> close
Disconnecting from the database [demo]...OK

> quit

OrientDB Studio/SQL query

Resultset is editable and
changes are immediately
persistent!


OrientDB Studio/db structure

Physical structure
of database


OrientDB Studio/server profiler

Statistics and timing are
collected in real-time


Always Free
Open Source Apache 2 license
free for any purposes,
even commercials


Prof€$$ional
$€rvic€$
by a network of companies through
Orient Technologies
support, training, consulting, mentoring


OrientDB OrientDB
for Java developers Master Development
8 hours 14 hours

OrientDB OrientDB
for SOA and the power of graphs
6 hours 6 hours

OrientDB OrientPlanet
for DBA for Web Developers
6 hours 6 hours


Certification Program
to be part of the network
do courses
share revenues for support
work as consultant

Contact
commercial@orientechnologies.com


Luca Garulli
Author of OrientDB and
Roma <Meta> Framework
Open Source projects,

Member of JSR#12 (jdo 1.0) and
JSR#243 (jdo 2.0)

CTO at Asset Data and Orient
www.twitter.com/lgarulli Technologies

@Rome, Italy Technical Manager at
Romulus consortium

OrientDB the database for the web 1.1

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