Chapter 3 - Understanding Spectra Advanced Bucket Management Concepts
Storage Domains
Spectra S3 Clients
Users can leverage a library of existing Spectra S3 clients available through the
or
develop their own client. The user moves data through the client to
the BlackPearl system and then the system handles all interaction with the data storage
hardware.
S
TORAGE
D
OMAINS
A storage domain is a collection of data partitions and, when applicable, media type
combinations. Storage domains define the possible places where data sent to the BlackPearl
Converged Storage System can be stored. Data persistence rules and data policies further
define where and for how long specific data is stored.
Entire data partition/media type combinations are members of storage domains. When
additional capacity is required, a single storage pool or tape is allocated out of the member
data partitions to fulfill the capacity requirement.
D
ATA
P
OLICIES
A data policy defines data integrity policies (checksum type and end-to-end CRC
requirements), default job priorities, and data persistence rules, which define where data
should be written and for how long it should be kept. A data policy may be used by
multiple buckets, but a bucket uses precisely one data policy.
A data policy consists of one or more permanent persistence rules, zero or more temporary
persistence rules, and zero or more retired persistence rules. A persistence rule can be
permanent, meaning that data is kept in the specified storage domain at all times, or
temporary, meaning that data is kept in the specified storage domain under certain
circumstances, and then it can be deleted from that storage domain. Existing permanent and
temporary persistence rules may be retired so that the rule is not applied for any new
incoming data, but continues to retain data previously written.
November 2020
User Guide-BlackPearl Converged Storage System
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