Chapter 3 - Understanding Spectra Advanced Bucket Management Concepts
Example Configurations
Parameter
Value
Description
Write
Optimization
Capacity
Job chunks are written across as few pieces of media as
possible. Fewer tape drives are used, so performance is
lower.
LTFS File Naming
Object ID
File names use the format {
bucket name
}/{
object id
}, for
example, bucket1/1fc6f09c-dd72-41ea-8043-
0491ab8a6d82.
Media Ejection
Allowed
cleared
Media ejection is not allowed.
Storage Domain Member for Tape First Copy
Tape Type
varies
The tape type matching the latest generation of tape
drive in the partition.
Auto Compaction
Threshold
20
The percentage of a tape with deleted objects at which
auto compaction is triggered. The default is 95. The
minimum is 10.
Write Preference
Normal
The system uses the partition after partitions with
High
write preference and before a partition with
Low
or
Never Select
write preference.
Storage Domain - Tape Second Copy -
A second copy of the data is written to a tape storage
domain optimized for tape ejection. This domain is created automatically when the system detects
a tape partition created on the tape library.
Days to wait
before verifying
data
null
Data integrity verification is not performed
automatically.
Secure Media
Allocation
cleared
Media allocated to the storage domain may be reused
by another storage domain if all data is deleted.
Write
Optimization
Capacity
Job chunks are written across as few pieces of media as
possible. Fewer tape drives are used, so performance is
lower.
LTFS File Naming
Object ID
File names use the format {
bucket name
}/{
object id
}, for
example, bucket1/1fc6f09c-dd72-41ea-8043-
0491ab8a6d82.
Media Ejection
Allowed
selected
Media ejection is allowed.
November 2020
User Guide-BlackPearl Converged Storage System
- 81 -
