Use the CENTERA device class when you are using EMC Centera
storage devices. The CENTERA device type uses files as volumes to
store data sequentially. It is similar to the FILE device class.
Privilege
class
To issue this command, you
must have system privilege or unrestricted storage privilege.
Syntax
>>-DEFine DEVclass--device_class_name--DEVType--=--CENTERA------>
.-,----------.
(1) V |
>--HLAddress------=----ip_address-+-?PEA_file------------------->
.-MINCAPacity--=--100M-. .-MOUNTLimit--=--1------.
>--+----------------------+--+-----------------------+---------><
'-MINCAPacity--=--size-' '-MOUNTLimit--=--number-'
Notes:
- For each Centera device class, you must specify
one or more IP addresses. However, a Pool Entry Authorization (PEA)
file name and path are optional, and up to one PEA file specification
can follow the IP addresses. Use the "?" character to separate the
PEA file name and path from the IP addresses.
Parameters
- device_class_name (Required)
- Specifies the name of the device class to be defined. The maximum
length of the device class name is 30 characters.
- DEVType=CENTERA (Required)
- Specifies that the Centera device type is assigned to this device
class. All volumes that belong to a storage pool that is defined to
this device class are logical volumes that are a form of sequential
access media.
- HLAddress
- Specifies
one ore more IP addresses for the Centera storage device and, optionally,
the name and path of one Pool Entry Authorization (PEA) file. Specify
the IP addresses with the dotted decimal format (for example, 9.10.111.222).
A Centera device might have multiple IP addresses. If multiple IP
addresses are specified, then the store or retrieve operation attempts
a connection by using each IP address that is specified until a valid
address is found.
The PEA file name
and path name are case-sensitive.
If you append the name and
path of a PEA file, ensure that the file is stored in a directory
on the system that runs the
Tivoli® Storage
Manager server.
Separate the PEA file name and path from the IP address with the "?"
character,
for example:
HLADDRESS=9.10.111.222,9.10.111.223?c:\controlFiles\TSM.PEA
HLADDRESS=9.10.111.222,9.10.111.223?/user/ControlFiles/TSM.PEA
Specify
only one PEA file name and path for each device class definition.
If
you specify two different Centera device classes that point to the
same Centera storage device and if the device class definitions contain
different PEA file names and paths, the
Tivoli Storage
Manager server uses
the PEA file that is specified in the device class HLADDRESS parameter
that was first used to open the Centera storage device.
Tips: - The Tivoli Storage
Manager server
does not include a PEA file during installation. If you do not create
a PEA file, the Tivoli Storage
Manager server
uses the Centera default profile, which can allow applications to
read, write, delete, purge, and query data on a Centera storage device.
To provide tighter control, create a PEA file with the command-line
interface that is provided by EMC Centera. For details about Centera
authentication and authorization, refer to the EMC Centera Programmer's
Guide.
- You can also specify the PEA file name and path
in an environment
variable with the syntax CENTERA_PEA_LOCATION=filePath_
fileName. The PEA file name and path that is specified
with this environment variable apply to all Centera clusters. If you
use this variable, you do not have to specify the PEA file name and
path with the HLADDRESS parameter.
- MINCAPacity
- Specifies
the minimum size for Centera volumes that are assigned
to a storage pool in this device class. This value represents the
minimum amount of data that is stored on a Centera volume before the Tivoli Storage
Manager server marks
it full. Centera volumes continue to accept data until the minimum
amount of data is stored. This parameter is optional.
Specify
this value as an integer followed by K (kilobytes), M (megabytes), G (gigabytes),
or T (terabytes). The default
value is 100 MB (MINCAPACITY=100M). The minimum value that is allowed
is 1 MB (MINCAPACITY=1M). The maximum value that is allowed is 128
GB (MINCAPACITY=128G).
- MOUNTLimit
- Specifies the maximum number of files that can be simultaneously
open for input and output. The default value is 1. This parameter
is optional. You can specify any number from 0 or greater; however,
the sum of all mount limit values for all device classes that are
assigned to the same Centera device must not exceed the maximum number
of sessions that are allowed by Centera.