DOWNLOAD POSTGRES-XC

Actual data is stored by Datanode as described below. Their features are given in the following sections. PGCon Developer Meeting page is here. We have Development Page and Project Home. Incoming statement is examined by the Coordinator as described next, and rebuilt to execute at each Datanode involved.

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It acts like conventional PostgreSQL backend process. Incoming statement is examined by the Coordinator as described next, and rebuilt to execute at each Datanode involved. Want to edit, but don't see an edit button when logged in?

Postgres-XC extracts this technology into separate component as GTM so that any Postgres-XC component's transaction management is based upon single global status. General PostgreSQL clauses are supported.

Postgres-XL

Tables may be distributed among Datanodes, or replicated to all the Datanodes. Coordinator Coordinator is an interface to applications. Postgres-XC Wiki page is now at new location.

Extracting transaction management into single server to provide transaction ID and snapshot, as well as other global values.

Datanode may receive request from various Coordinators. Preferred method of contact: Infrastructure for the scalability and transaction management has already been done. Please visit there for the latest information. It supports a large part of the SQL standard and offers many modern features: Details will be described in Chapter Latest version is v1. Details of the roadmap can be found in the project home page.

Views Page Discussion View source History. When issuing statement to Datanodes, it is associated with GXID and Global Snapshot so that Datanode is not confused if it receives another statement from another transaction originated by another Coordinator.

There are more challenges related to clustering though:. Actual data is stored by Datanode as described below. Coordinator receives SQL statements, get Global Transaction Id and Global Snapshot as needed, determine which Datanode is involved and ask them to execute a part of statement.

Datanode Datanode actually stores your data. Personal tools Log in. However, Coordinator does not store any actual data.

postgres-xc : Trusty () : Ubuntu

Datanode does not have global view of the whole database, it just takes care of locally stored data. Retrieved from " https: PGCon Cluster Summit page is here.

PGCon Developer Meeting page is here. This is Postgres-XC property according to the guideline as suggested here.

Postgres-XC - PostgreSQL wiki

However, because each the transaction posttgres-xc identified uniquely and associated with consistent global snapshot, data node doesn't have to worry what Coordinator each transaction or statement came from. Their features are given in the following sections. Thus Postgres-XC provides consistent database view to any transactions running on any master.

Distribution can be also done on a portion of nodes if wanted. We have Development Page and Project Home.