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Status Not under consideration
Workspace Storage Protect Family
Categories Spectrum Protect (Server)
Created by Guest
Created on Nov 27, 2012

RELATED IDEAS

TSM deduplicated data in an offsite copy storage pool

See this idea on ideas.ibm.com

Customer Lyle Fast wants to request a change to the way TSM works regarding deduplicated data in an offsite copy storage pool.

TSM recommends that offsite storage pools have a fully hydrated copy local and any offsite copies are non-deduplicated. Lyle feels this defeats the purpose of using deduplication (saving storage space for backups).

Why is dedup copypool not a good idea?
Not recommended as a DR restore will fail because the copy stgpool would only have the deduplicated copies of the data and no non-deduplicated copies to rehydrate the data for restore (no way to access the extents)

I thought the purpose of TSM Client side deduplication or server deduplication in an all disk environment was to save storage space for backups. If TSM support recommends a local non-deduplicated copy storage pool and copy non-deduplicated storage pool offsite, where is the savings?

In Effective Planning and Use of IBM Tivoli Storage Manager V6 Deduplication it mentions the DEDUPREQUIRESBACKUP option, recommends yes that data is not processed by identify duplicates until it is backup to a non-deduplicated storage pool.

I think there needs to be another option to DEDUPFORCEDCOPY that would copy all the blocks in the primary storage pool offsite deduplicate=YES backup copy storage pool.

Idea priority High
  • 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
    |     Feb 5, 2013

    Thank you for submitting the request. This is a recognized requirement and a solution appears to be desirable. This request is not in a committed release plan for next year,
    but the theme is aligned with our multi-year strategy, and will be a candidate for our future release. IBM’s plans may change and no commitment is made that a solution will be provided.

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