Question about HACMP for active-active mode Post: 302365567

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Operating Systems AIX Question about HACMP for active-active mode Post 302365567 by shockneck on Tuesday 27th of October 2009 12:27:13 PM

10-27-2009

Registered User

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? Smilie

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.

shockneck

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LEARN ABOUT MOJAVE

dbix::class::storage::dbi::oracle::wherejoins5.18

DBIx::Class::Storage::DBI::Oracle::WhereJoins(3)	User Contributed Perl Documentation	  DBIx::Class::Storage::DBI::Oracle::WhereJoins(3)

NAME

       DBIx::Class::Storage::DBI::Oracle::WhereJoins - Oracle joins in WHERE syntax support (instead of ANSI).

PURPOSE

       This module is used with Oracle < 9.0 due to lack of support for standard ANSI join syntax.

SYNOPSIS

       DBIx::Class should automagically detect Oracle and use this module with no work from you.

DESCRIPTION

       This class implements Oracle's WhereJoin support.  Instead of:

	   SELECT x FROM y JOIN z ON y.id = z.id

       It will write:

	   SELECT x FROM y, z WHERE y.id = z.id

       It should properly support left joins, and right joins.	Full outer joins are not possible due to the fact that Oracle requires the entire
       query be written to union the results of a left and right join, and by the time this module is called to create the where query and table
       definition part of the SQL query, it's already too late.

METHODS

       See DBIx::Class::SQLMaker::OracleJoins for implementation details.

BUGS

       Does not support full outer joins.  Probably lots more.

SEE ALSO

       DBIx::Class::SQLMaker
       DBIx::Class::SQLMaker::OracleJoins
       DBIx::Class::Storage::DBI::Oracle::Generic
       DBIx::Class

AUTHOR

       Justin Wheeler "<jwheeler@datademons.com>"

CONTRIBUTORS

       David Jack Olrik "<djo@cpan.org>"

LICENSE

       This module is licensed under the same terms as Perl itself.

perl v5.18.2							    2013-07-12			  DBIx::Class::Storage::DBI::Oracle::WhereJoins(3)