Reliability Analysis of Deduplicated and Erasure-Coded Storage

 
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Old 10-23-2010
Reliability Analysis of Deduplicated and Erasure-Coded Storage

HPL-2010-146 Reliability Analysis of Deduplicated and Erasure-Coded Storage - Li, Xiaozhou; Lillibridge, Mark; Uysal, Mustafal
Keyword(s): Deduplication, erasure coding
Abstract: Space efficiency and data reliability are two primary concerns for modern storage systems. Chunk-based deduplication, which breaks up data objects into single-instance chunks that can be shared across objects, is an effective method for saving storage space. However, deduplication affects data relia ...
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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)