dbhash_open

Open a database of type key/data.

DBHASH_OPEN

NAME

dbhash_open - Open a database of type key/data.

SYNOPSIS

dbhash_open (file:string, [,mode:integer,bnum:integer]);

DESCRIPTION

This function is used to open a key/data(nosql) database. The advantage of a key/data database over a relationnal database is the speed.

The disavantage is that a key/data does not support SQL.

The following definitions could be used for key/data operation:

    %define  GDBM_READER  0;        /* A reader. */
    %define  GDBM_WRITER  1;        /* A writer. */
    %define  GDBM_WRCREAT 2;        /* A writer.  Create the db if needed. */
    %define  GDBM_NEWDB   3;        /* A writer.  Always create a new db. */
    %define  GDBM_FAST    0x10; /* Write fast! => No fsyncs.  OBSOLETE. */
    %define  GDBM_SYNC    0x20; /* Sync operations to the disk. */
    %define  GDBM_NOLOCK  0x40; /* Don't do file locking operations. */
    %define  GDBM_INSERT  0;        /* Never replace old data with new. */
    %define  GDBM_REPLACE 1;        /* Always replace old data with new. */

PARAMETERS

mode: Specify mode. Default is GDBM_WRCREAT.

bnum: Block_size is the size of a single transfer from disk
to memory. This parameter is ignored unless the file is a new file. The minimum size is 512. If it is less than 512, dbm will use the stat block size for
the file system.

RETURN

db: Pointer to the database. Used for all other call

MODULES

To use this module, you must specify the following in /usr/local/website/site.conf:

Module hash {
    Library : "/usr/local/lib/libsndbhash.so"
    Init : "sndbhash_init"
}

EXAMPLES

hash = dbhash_open("/hash/test.db");

AUTHOR

Written by Pierre Laplante, <laplante@sednove.com>

MODIFICATIONS

1.0 2015-02-09 21:24:14 laplante@sednove.com

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