xa_config.so

berkeley db 4.6.21的源码。berkeley db是一个简单的数据库管理系统

m4_comment([$Id: xa_config.so,v 10.23 2003/06/27 17:38:24 bostic Exp $])

m4_ref_title(Distributed Transactions,
    Configuring m4_db with the Tuxedo System,
    configuring m4_db with the @Tuxedo System,
    xa/xa_intro, xa/faq)

m4_p([dnl
This information assumes that you have already installed the m4_db
library.])

m4_p([dnl
First, you must update the resource manager file in Tuxedo.  For the
purposes of this discussion, assume that the Tuxedo home directory is in])

m4_indent([/home/tuxedo])

In that case, the resource manager file will be located in

m4_indent([/home/tuxedo/udataobj/RM])

Edit the resource manager file, adding the line

m4_indent([dnl
BERKELEY-DB:db_xa_switch:-L${DB_INSTALL}/lib -ldb m4_backslash([])
	-lsocket -ldl -lm])

m4_p([dnl
where ${DB_INSTALLHOME} is the directory into which you installed the m4_db
library.])

m4_p([dnl
m4_bold([Note that the previous load options are for a Sun Microsystems
Solaris 5.6 Sparc installation of Tuxedo, and may not be correct for
your system.])])

m4_p([dnl
Next, you must build the transaction manager server.  To do this, use the
Tuxedo m4_manref(buildtms, 1) utility.  The buildtms utility will create
the Berkeley-DB resource manager in the directory from which it was run.
The parameters to buildtms should be])

m4_indent([buildtms [-v] -o DBRM -r BERKELEY-DB])

m4_p([dnl
This will create an executable transaction manager server, DBRM, which is
called by Tuxedo to process begins, commits, and aborts.])

m4_p([dnl
Finally, you must make sure that your TUXCONFIG environment variable
identifies an ubbconfig file that properly identifies your resource
managers.  In the GROUPS section of the ubb file, you should identify the
group's LMID and GRPNO, as well as the transaction manager server name
"TMSNAME=DBRM."  You must also specify the OPENINFO parameter, setting it
equal to the string])

m4_indent([rm_name:dir])

m4_p([dnl
where rm_name is the resource name specified in the RM file (that is,
BERKELEY-DB) and dir is the directory for the m4_db home environment
(see m4_ref(dbenv_open) for a discussion of m4_db environments).])

m4_p([dnl
Because Tuxedo resource manager startup accepts only a single string
for configuration, any environment customization that might have been
done via the config parameter to m4_ref(dbenv_open) must instead be done
by placing a m4_ref(DB_CONFIG) file in the m4_db environment directory.
See m4_link(M4RELDIR/ref/env/naming, [m4_db File Naming]) for further
information.])

m4_p([dnl
Consider the following configuration.  We have built a transaction
manager server, as described previously.  We want the m4_db environment
to be m4_path([/home/dbhome]), our database files to be maintained in
m4_path([/home/datafiles]), our log files to be maintained in
m4_path([/home/log]), and we want a duplexed server.])

m4_p([dnl
The GROUPS section of the ubb file might look like the following])

m4_indent([dnl
group_tm LMID=myname GRPNO=1 TMSNAME=DBRM TMSCOUNT=2 m4_backslash([])
	OPENINFO="BERKELEY-DB:/home/dbhome"])

m4_p([dnl
There would be a m4_ref(DB_CONFIG) configuration file in the directory
m4_path([/home/dbhome]) that contained the following two lines:])

m4_indent([dnl
set_data_dir	/home/datafiles
set_lg_dir	/home/log])

m4_p([dnl
Finally, the ubb file must be translated into a binary version using
Tuxedo's m4_manref(tmloadcf, 1) utility, and then the pathname of that
binary file must be specified as your TUXCONFIG environment variable.])

m4_p([dnl
At this point, your system is properly initialized to use the m4_db
resource manager.])

m4_p([dnl
See m4_ref(dbh_create) for further information on accessing data files
using XA.])

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