IBM E16RMLL-I - Tivoli Storage Manager, Руководство по внедрению

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IBM Tivoli Storage Manager Implementation Guide
Tivoli Storage Manager has two types of storage pools:
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Primary storage pools
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Copy storage pools
A primary storage pool can use random access storage (DISK device class) or
sequential access storage (tape, optical, or file device classes). A copy storage
pool can use only sequential access storage.
You can define your storage pools in any order. However, it is easier to first
create the pools that will be pointed to by others.
6.3.1 Defining a sequential access tape storage pool
Define a primary tape storage pool using the define stgpool command with your
defined device class (LTO2-DC in our case). Important options are:
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MAXSCRatch: This is the number of scratch tapes that the storage pool can
use before it reports that it is full. For automatic libraries, set MAXSCRatch to
a large number (for example, 1,000,000) to avoid the server stopping when
the storage pool is “full.” For manual libraries with a small capacity, set
MAXSCRatch to a more realistic number.
򐂰 REClaim: This is the percentage of empty space on a tape volume that will
cause the server to try to consolidate the remaining data to another volume.
Set REClaim to 100 to disable reclamation. This requires scheduled
reclamation for the storage pool.
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COLlocate: This specifies whether the server tries to keep data from a client,
group of clients, or client file spaces on as few tapes as possible (known as
collocation). Collocation reduces the number of tapes required to perform
restore operations, but will increase the number of tapes required to store
client data.
򐂰 RECLAIMSTGpool: If your library has only one drive, you will need another
primary sequential storage pool to permit reclamation. Note that we do not
recommend single drive configurations for production systems, as discussed
in 2.9.3, “Number of tape drives” on page 52.
Example 6-9 defines a primary sequential tape pool.
Example 6-9 Defining a primary sequential tape pool
tsm: ATLANTIC>d
efine stgpool tapedata LTO2-DC description="Primary tape pool"
reclaim=100 maxscratch=1000000 collocate=node
ANR2200I Storage pool TAPEDATA defined (device class LTO2-DC).
tsm: ATLANTIC>
q stgp
Storage Device Estimated Pct Pct High Low Next Storage