This is an introductory document for L<DBIx::Class::Storage::Replication>.
This document is not an overview of what replication is or why you should be
-using it. It is not a document explaing how to setup MySQL native replication
-either. Copious external resources are avialable for both. This document
+using it. It is not a document explaining how to setup MySQL native replication
+either. Copious external resources are available for both. This document
presumes you have the basics down.
=head1 DESCRIPTION
For an easy way to start playing with MySQL native replication, see:
L<MySQL::Sandbox>.
-If you are using this with a L<Catalyst> based appplication, you may also wish
+If you are using this with a L<Catalyst> based application, you may also want
to see more recent updates to L<Catalyst::Model::DBIC::Schema>, which has
support for replication configuration options as well.
and let L<DBIx::Class> do its thing.
If you want to use replication, you will override this setting so that the
-replicated storage engine will 'wrap' your underlying storages and present to
-the end programmer a unified interface. This wrapper storage class will
+replicated storage engine will 'wrap' your underlying storages and present
+a unified interface to the end programmer. This wrapper storage class will
delegate method calls to either a master database or one or more replicated
databases based on if they are read only (by default sent to the replicants)
or write (reserved for the master). Additionally, the Replicated storage
storage itself (L<DBIx::Class::Storage::DBI::Replicated>). A replicated storage
takes a pool of replicants (L<DBIx::Class::Storage::DBI::Replicated::Pool>)
and a software balancer (L<DBIx::Class::Storage::DBI::Replicated::Pool>). The
-balancer does the job of splitting up all the read traffic amongst each
-replicant in the Pool. Currently there are two types of balancers, a Random one
+balancer does the job of splitting up all the read traffic amongst the
+replicants in the Pool. Currently there are two types of balancers, a Random one
which chooses a Replicant in the Pool using a naive randomizer algorithm, and a
First replicant, which just uses the first one in the Pool (and obviously is
only of value when you have a single replicant).
This object (L<DBIx::Class::Storage::DBI::Replicated::Pool>) manages all the
declared replicants. 'maximum_lag' is the number of seconds a replicant is
allowed to lag behind the master before being temporarily removed from the pool.
-Keep in mind that the Balancer option 'auto_validate_every' determins how often
+Keep in mind that the Balancer option 'auto_validate_every' determines how often
a replicant is tested against this condition, so the true possible lag can be
higher than the number you set. The default is zero.
No matter how low you set the maximum_lag or the auto_validate_every settings,
there is always the chance that your replicants will lag a bit behind the
master for the supported replication system built into MySQL. You can ensure
-reliabily reads by using a transaction, which will force both read and write
+reliable reads by using a transaction, which will force both read and write
activity to the master, however this will increase the load on your master
database.
projects / dbsrgits/DBIx-Class.git / blobdiff