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::oracle
Session::Oracle(3) User Contributed Perl Documentation Session::Oracle(3)
NAME
Apache::Session::Oracle - An implementation of Apache::Session
SYNOPSIS
use Apache::Session::Oracle;
#if you want Apache::Session to open new DB handles:
tie %hash, 'Apache::Session::Oracle', $id, {
DataSource => 'dbi:Oracle:sessions',
UserName => $db_user,
Password => $db_pass,
Commit => 1
};
#or, if your handles are already opened:
tie %hash, 'Apache::Session::Oracle', $id, {
Handle => $dbh,
Commit => 1
};
DESCRIPTION
This module is an implementation of Apache::Session. It uses the Oracle backing store and no locking. See the example, and the
documentation for Apache::Session::Store::Oracle for more details.
USAGE
The special Apache::Session argument for this module is Commit. You MUST provide the Commit argument, which instructs this module to
either commit the transaction when it is finished, or to simply do nothing. This feature is provided so that this module will not have
adverse interactions with your local transaction policy, nor your local database handle caching policy. The argument is mandatory in order
to make you think about this problem.
This module also respects the LongReadLen argument, which specifies the maximum size of the session object. If not specified, the default
maximum is 8 KB.
AUTHOR
This module was written by Jeffrey William Baker <jwbaker@acm.org>.
SEE ALSO
Apache::Session::File, Apache::Session::Flex, Apache::Session::DB_File, Apache::Session::Postgres, Apache::Session
perl v5.12.1 2007-09-28 Session::Oracle(3)