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  1. #1
    Join Date
    Sep 2001

    Unanswered: synchronous replication

    If someone is onterested in clustering / synchronous replication
    this link could be useful

    cross database actions
    After many questions about cross database actions I created this thread.

    In the source there is a programm in contrib called dblink

    with this it is possible todo crossdatabase interactions
    After I have seen so much questions about indexing here is a small FAQ

    1. workaround:
    set seq_scan=off;
    set seq_scan=on;

    planer is forced to use indices.

    2. always write SELECTS like this

    SELECT x,y FROM T_table WHERE x='7' AND y='get it';

    always make single quotes. The planer can work better with single quotes.
    Some internal things are getting better with that. Does not remember the whole story, but it is working.
    Last edited by eperich; 06-18-04 at 03:55.
    --Postgresql is the only kind of thing--

  2. #2
    Join Date
    Sep 2001


    The new verion of pgpool, yet another open source replication software
    for PostgreSQL is now in RC1:

    pgpool is a single master/query based/synchronous replication
    server. It acts as a proxy server between PostgreSQL client and
    PostgreSQL server. No application change is needed to use pgpool.
    pgpool's features include:

    o connection pooling. This will reduce the connection establishing

    o pre-forking child processes. Like Apache, pgpool pre-forks child
    processes to provide faster service startup.

    o degeneration. In the replication mode, if one of PostgreSQL goes
    down, it detaches the broken server and continues operation with the
    surviving server.

    o fail over. In the connection pool server mode, if master PostgreSQL
    goes down, it detaches the broken server and continues operation
    with the stand-by server.

    In addtion to above, 2.0 supports native V3 protocol which should make
    pgpool faster if used with PostgreSQL 7.4 or later.

    Also, now pgpool supports the load balancing between master/secondary
    PostgreSQL backends to gain better performace for SELECT statement.
    --Postgresql is the only kind of thing--

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