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Setting Shared Memory Options

Tivoli Storage Manager supports shared memory communication between clients and servers on the same machine. To use shared memory, TCP/IP must be installed on the machine. Here is a sample shared memory setting:

+--------------------------------------------------------------------------------+
|commmethod     sharedmem                                                        |
|   shmport     1510                                                             |
+--------------------------------------------------------------------------------+

In this example, SHMPORT specifies the TCP/IP port address of a server when using shared memory. Use the SHMPORT option to specify a different TCP/IP listen port. The default port address is 1510.

Note:
The Tivoli Storage Manager server supports a maximum of sixty-four concurrent shared memory sessions.


Attention
  
To avoid shared memory communication errors, at least one of the following statements must be true:
  • The dsm.sys stanza for the local client must include "PASSWORDACCESS GENERATE". This causes the dsmtca (Trusted Communications Agent) to run as root.
  • The client user ID must be root.
  • The client and server user ID must be the same.
  • The programs file permissions for the administrative client is altered by using the following commands:
    +--------------------------------------------------------------------------------+
    |cd /usr/tivoli/tsm/bin                                                          |
    |chown root.system dsmadm                                                        |
    |chmod u+s dsmadm                                                                |
    |chown root.system dsmadmc                                                       |
    |chmod u+s dsmadmc                                                               |
    +--------------------------------------------------------------------------------+


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