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AMASS Overview
6-00026-01 Rev A Online Archiving with AMASS 1-17
Tape Streaming
Improves Write
Performance
Streaming tape IO provides a constant flow of data output to a
drive, which lessens start and stop operations. This feature
typically improves write performance but depends on file size,
number of files, and drive type.
During processing, a cache block has the following three states
described:
• Queued = Cache block of data waiting for IO to start
• Pending = Cache block of data in the drives’s buffer
• Done = Cache blocks that have been verified as written to
media
The following figure illustrates these three states:
Tape streaming is configured globally with the config_prod
-o
script after you install AMASS. For more information about
this script, refer to the Optional Parameters appendix in
Installing AMASS.
Refer to the AMASS Release Notes for a list of valid drives for
I/O tape streaming.
2. ... one block in the
drive’s buffer is freed-up
so data continues to be
written to the drive.
Drive
1. As one block of
data is written to
media ...
QUEUED PENDING
DONE
D
A
T
A
IN
C
A
C
HE