Postgres-XC tutorial PDF - PGCon
Postgres-XC tutorial PDF - PGCon
Postgres-XC tutorial PDF - PGCon
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Summary<br />
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Coordinator<br />
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Connection point from Apps<br />
SQL analysis and global planning<br />
Global SQL execution<br />
Datanode (or simply “NODE”)<br />
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Actual database store<br />
<strong>Postgres</strong><strong>XC</strong> Kernel, based upon<br />
vanilla PostgreSQL<br />
Share the binary<br />
Recommended to configure as<br />
a pair in OLTP Apps.<br />
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Local SQL execution<br />
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GTM (Global Transaction Manager)<br />
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Provides consistent database view to transactions<br />
– GXID (Global Transaction ID)<br />
– Snapshot (List of active transactions)<br />
Different binaries<br />
– Other global values such as SEQUENCE<br />
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GTM Proxy, integrates serverlocal transaction requirement for performance<br />
May 16th, 2012 <strong>Postgres</strong><strong>XC</strong> 15
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