10-27-2009
Quote:
Originally Posted by
qiulang
[...]But back to my original question, if concurrent HACMP RG means Oracle RAC and since no takeover is involved (and RAC10g has its own clusterware), what is the benefit of using HACMP with RAC ?
That was your original question?
As always ... The decision on whether to use HACMP or not could be based on what filesystem you want to use. For Oracle RAC you neither need HACMP when using ASM nor when using GPFS. However IIRC you need ECM VG if you use Oracle datafiles on concurrent raw LV.
What also might count is your IT personnels expertise. Do your administrators have good knowledge of GPFS / ASM? Then use it. However if your administrators have good knowledge of HACMP then ECM might be preferable.
Quote:
Originally Posted by
qiulang
[...]2 RGs would be on one node. Then I think these 2 RGs should contain different applications. [...]
One application cannot be member of two RGs.
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LEARN ABOUT SUSE
apache::session::store::oracle
Session::Store::Oracle(3) User Contributed Perl Documentation Session::Store::Oracle(3)
NAME
Apache::Session::Store::Oracle - Store persistent data in a Oracle database
SYNOPSIS
use Apache::Session::Store::Oracle;
my $store = new Apache::Session::Store::Oracle;
$store->insert($ref);
$store->update($ref);
$store->materialize($ref);
$store->remove($ref);
DESCRIPTION
Apache::Session::Store::Oracle fulfills the storage interface of Apache::Session. Session data is stored in a Oracle database.
SCHEMA
To use this module, you will need at least these columns in a table called 'sessions':
id varchar2(32) # or however long your session IDs are.
a_session long
To create this schema, you can execute this command using the sqlplus program:
CREATE TABLE sessions (
id varchar2(32) not null primary key,
a_session long
);
If you use some other command, ensure that there is a unique index on the table's id column.
CONFIGURATION
The module must know what datasource, username, and password to use when connecting to the database. These values can be set using the
options hash (see Apache::Session documentation). The options are DataSource, UserName, and Password.
Example:
tie %hash, 'Apache::Session::Oracle', $id, {
DataSource => 'dbi:Oracle:database',
UserName => 'database_user',
Password => 'K00l'
};
Instead, you may pass in an already-opened DBI handle to your database.
tie %hash, 'Apache::Session::Oracle', $id, {
Handle => $dbh
};
The last option is LongReadLen, which specifies the maximum size of the session object. If not supplied, the default maximum size is 8 KB.
AUTHOR
This modules was written by Jeffrey William Baker <jwbaker@acm.org>
A fix for the commit policy was contributed by Michael Schout <mschout@gkg.net>
SEE ALSO
Apache::Session, Apache::Session::Store::DBI
perl v5.12.1 2007-09-28 Session::Store::Oracle(3)