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Status Delivered
Workspace Storage Protect Family
Categories Spectrum Protect (Server)
Created by Guest
Created on Jan 13, 2012

RELATED IDEAS

Update the behavior of space allocation when using DEVCLASS type FILE , when more than 1 directory is specified

The file based device class allows user to specify more than 1 directory as destination to store TSM volumes. When you specify more than 1 directory, spread over multiple file system, you can have error message reported (ANR8785E) saying that we're running out of space in one of the available direcories in the device class. The point is that there is available space on others directories/file systems so this error messages is reported "by mistake", and TSM is aware about that because is trying to write data on others of the directories specified in the device class. I 'd like that TSM spread the volumes over the directories first, then test if he is able to store data on a directory/file system, and if not, he tries on another one, and if all the directories/file systems are out of space, so he can raised an alert (ANR8785E) .

Idea priority Medium
  • Guest
    Reply
    |     Jun 12, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Storage
    Product - Tivoli Storage Manager (TSM) Family

    For recording keeping, the previous attributes were:
    Brand - Tivoli
    Product family - Storage
    Product - Tivoli Storage Manager (TSM) Family

  • Guest
    Reply
    |     Jan 24, 2012

    TSM does check available space prior to allocating it in a file devclass.  The use of space triggers can allow for earlier notifications of space shortage because volumes are pre-allocated when space usage thresholds are reached. Space Triggers are documented under the DEFINE SPACETRIGGER command.


    The problem here may be that the multiple directories may be within the same file system  - we document to customers in the DEFINE DEVCLASS ( for FILE ) command the following:


    Tip: If you specify multiple directories for a device class, ensure that the directories are associated with separate file systems. Space trigger functions and storage pool space calculations take into account the space remaining in each directory. If you specify multiple directories for a device class and the directories reside in the same file system, the server will calculate space by adding values representing the space remaining in each directory. These space calculations will be inaccurate. Rather than choosing a storage pool with sufficient space for an operation, the server might choose the wrong storage pool and run out of space prematurely. For space triggers, an inaccurate calculation might result in a failure to expand the space available in a storage pool. Failure to expand space in a storage pool is one of the conditions that can cause a trigger to become disabled. If a trigger is disabled because the space in a storage pool could not be expanded, you can re-enable the trigger by issuing the following command: update spacetrigger stg. No further changes are required to the space trigger. 


    Both commands are documented from http://publib.boulder.ibm.com/infocenter/tsminfo/v6r3/index.jsp
    by following:
    IBM Tivoli Storage Manager servers
     Server commands, options, and utilities
      Administrative commands
        DEFINE commands
          DEFINE DEVCLASS
             File
          Or       DEFINE SPACETRIGGER

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