moving data from FS from one storage to FS in another storage Post: 302470416

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Operating Systems AIX moving data from FS from one storage to FS in another storage Post 302470416 by filosophizer on Wednesday 10th of November 2010 04:55:57 AM

11-10-2010

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Quote:

Originally Posted by bakunin

This will work as expected, but will be slower than the mirrorlv/mirrorvg procedure. The reason is that migratepv only works serially, while mirrorlv has (can have) several processes in parallel.

If O/P has a SVC s/he could use flash copy, which will probably be the fastest method but this requires stopping/starting of the application and a remount of the filesystems involved.

I hope this helps.

bakunin

I once tried flashcopy on DS4700 but flash copy only creates a readonly copy. You cannot write on it. May be the higher versions of DS like DS5020 or above, have the function to copy in read/write mode from SAN Storage to SAN Storage.

SVC = Storage Volume Controller is a very good option, but very few companies buy. It is usually used to consolidate/connect different SAN Storages through one box.

filosophizer

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dbix::class::storage::dbi::replicated::replicant

DBIx::Class::Storage::DBI::Replicated::Replicant(3pm)	User Contributed Perl Documentation  DBIx::Class::Storage::DBI::Replicated::Replicant(3pm)

NAME

       DBIx::Class::Storage::DBI::Replicated::Replicant - A replicated DBI Storage Role

SYNOPSIS

       This class is used internally by DBIx::Class::Storage::DBI::Replicated.

DESCRIPTION

       Replicants are DBI Storages that follow a master DBI Storage.  Typically this is accomplished via an external replication system.  Please
       see the documents for DBIx::Class::Storage::DBI::Replicated for more details.

       This class exists to define methods of a DBI Storage that only make sense when it's a classic 'slave' in a pool of slave databases which
       replicate from a given master database.

ATTRIBUTES

       This class defines the following attributes.

   active
       This is a boolean which allows you to programmatically activate or deactivate a replicant from the pool.  This way you can do stuff like
       disallow a replicant when it gets too far behind the master, if it stops replicating, etc.

       This attribute DOES NOT reflect a replicant's internal status, i.e. if it is properly replicating from a master and has not fallen too many
       seconds behind a reliability threshold.	For that, use "is_replicating"	and "lag_behind_master".  Since the implementation of those
       functions database specific (and not all DBIC supported DBs support replication) you should refer your database-specific storage driver for
       more information.

   master
       Reference to the master Storage.

METHODS

       This class defines the following methods.

   debugobj
       Override the debugobj method to redirect this method call back to the master.

ALSO SEE

       <http://en.wikipedia.org/wiki/Replicant>, DBIx::Class::Storage::DBI::Replicated

AUTHOR

       John Napiorkowski <john.napiorkowski@takkle.com>

LICENSE

       You may distribute this code under the same terms as Perl itself.

perl v5.14.2							    2010-06-03		     DBIx::Class::Storage::DBI::Replicated::Replicant(3pm)