E24254-01 •
Appendix A Content Management 137
Content Management
■
Managing Cartridges
•
Move
inactive
cartridges out of the library or off of an LSM to ensure
there is adequate space for
active
cartridges.
•
Plan for times of
peak activity
.
•
Free cell management:
-
If the same drive-type and media-type are on the same rail for
specific applications, fewer free cells are required.
-
If a specific application requires several enters and ejects or
pass-thru operations, more free cells are required.
Managing cartridges—how cartridges are entered, ejected, handled, and treated—in the library can
have an affect on performance. Some considerations include:
❏
Use tape management
applications (ExLM)
Use a library management application such as ExLM with HSC to keep
active volumes on the same LSMs as compatible drives and to migrate
less active volumes.
❏
Use the float option
When
float
is on, ACSLS or HSC selects a new home cell for a cartridge
that is in an LSM as close to the drive as possible on a dismount. This
option automatically clusters cartridges by the drives for the workload.
Make sure each LSM contains enough free cells to allow selection of a
new home cell in that LSM.
❏
Cluster cartridges
Cluster cartridges by workload on separate rails with enough tape
drives to support the maximum activity—peak usage—for the workloads
❏
Entering cartridges
Enter cartridges through the CAP.
When
manually
placing cartridges in the library with the front access
door open,
library operations cease
and the library management
software—such as ACSLS or HSC—must perform a
full audit
to update
the library database to match the actual contents of the library.
When you enter cartridges through the CAP the library stays online,
mounts can continue, and the library management software always tries
to move the cartridge to an LSM adjacent to the CAP magazine—
minimizing pass-thru activity.
❏
Ejecting cartridges
Ordered
or
Unordered
Ejects?
Specifying ordered ejects places the volume serial numbers
(VOLSERs) in a specific sequence. This operation is significantly slower
than unordered ejects which allows ACSLS or HSC to eject cartridges
to a CAP magazine adjacent to that LSM—minimizing pass-thru activity.
❏
Archiving cartridges
When using HSC with ExLM, move the
least recently used
(LRU)
cartridges farther out on the rail, away from the tape drives and slots in
the Performance Zone.
Consider using the
top rail
as an archival LSM if the tape does not
require CAP activity—few enters and ejects.
❏
Managing space
❏
Supplying scratch
cartridges
Make sure each rail has the correct amount and type of data cartridges
plus
enough scratch cartridges to support the workload.
Summary of Contents for StorageTek StreamLine SL8500
Page 4: ...Summary of Changes iv SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 12: ...Contents xii SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 18: ...Tables xviii SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 76: ...Introduction 56 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 97: ...E24254 01 Chapter 3 Site Survey Forms 77 Site Survey Forms Figure 21 Content Management Plan ...
Page 137: ...E24254 01 Chapter 4 Site Preparation 117 Site Preparation ...
Page 138: ...Site Preparation 118 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 198: ...Electrical Conversions 176 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 206: ...Comparisons 184 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 233: ...E24254 01 Appendix H Partitioning 211 Partitioning Make copies as necessary ...
Page 240: ...Partitioning 218 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 251: ...E24254 01 Appendix J Work Sheets 229 Work Sheets Figure 73 Content Management Work Sheet ...
Page 276: ...Index 254 SL8500 Systems Assurance Guide June 2011 E24254 01 ...
Page 277: ......
Page 278: ...Oracle Corporation Worldwide Headquarters 500 Oracle Parkway Redwood Shores CA 94065 U S A ...