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Servidores de Aplicaciones - Seminaris Empresa

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Arquitectura <strong>de</strong> datos y acceso<br />

Synchronous Replication:<br />

Updates are synchronized<br />

across both copies of the data<br />

Data Distribution:<br />

Tables automatically distributed<br />

across active no<strong>de</strong>s<br />

Table T<br />

Fragments<br />

0<br />

1<br />

2<br />

3<br />

4<br />

5<br />

0<br />

1<br />

2<br />

3<br />

4<br />

5<br />

DRU 0<br />

NODE<br />

0<br />

NODE<br />

2<br />

NODE<br />

4<br />

NODE<br />

6<br />

0<br />

1<br />

2<br />

3<br />

4<br />

5<br />

DRU 1<br />

NODE<br />

1<br />

NODE<br />

3<br />

NODE<br />

5<br />

NODE<br />

7<br />

0<br />

1<br />

2<br />

3<br />

4<br />

5<br />

Site<br />

Transparency:<br />

From the outsi<strong>de</strong>, the cluster<br />

Is invisible, and Clustra looks<br />

like a single-image database<br />

JDBC<br />

Load balancing:<br />

Connections automatically<br />

shared across all no<strong>de</strong>s

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