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Special Forums Hardware Filesystems, Disks and Memory iostat output vs TPC output (array layer) Post 302517481 by arizah on Wednesday 27th of April 2011 01:27:53 AM
Old 04-27-2011
Thanks for the lines. Day by day becomes trickier. We are moving from IBM DS800 storage to a new Hitachi Storage and it looks like performance is a lot better. I suppose bigger cache at the Storage subsystem make a big difference but then you may face other bottlenecks like network latency or fiber channels congestions. Also in the near futture we will be migrating to a new Power7 server where most of these bottleneck suppose to disapear. Thanks again.
 

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

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 v5.16.2 2011-05-23 DBIx::Class::Storage::DBI::Replicated::Replicant(3)
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