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Thread: What are Writer Metadata Document Life Cycle?

  1. #1
    Join Date
    May 2009
    Posts
    1,952

    What are Writer Metadata Document Life Cycle?

    Hello everyone,
    I have recently started with some topics of the writer metadata. I have done through the topics of IVssBackupComponents: GatherWriterMetadata but was not understood much about it. So I thought to ask you members about it. But the main thing I want to ask is what are Writer Metadata Document Life Cycle? Hope that someone over there would be interested in helping me.!!

  2. #2
    Join Date
    Apr 2008
    Posts
    3,295

    Re: What are Writer Metadata Document Life Cycle?

    In response to year Identify event , EACH writer this is the system constructs ITS Own Writer Metadata Document using IVssCreateWriterMetadata . Identify IS An event generated by a requester Typically calling IVssBackupComponents: GatherWriterMetadata. When Creating a Writer Metadata Document, Either Through the IVssCreateWriterMetadata gold-through interface initialization writer ( CVssWriter:: Initialize ), a writer must Explicitly specify the Following :
    • Restore Method
    • Writer name
    • Writer class ID
    • Data use (see VSS_USAGE_TYPE )
    • Date source type (see VSS_SOURCE_TYPE )

  3. #3
    Join Date
    Jan 2008
    Posts
    3,388

    Re: What are Writer Metadata Document Life Cycle?

    After reading the post of 'Lillebror', I think that in addition, It May Also specify the Following :
    • Components (Which May Contain Gold May not file sets)
    • Add alternate mappings
    • Exclude file lists

    Typically requesters make use of One of Two methods to Obtain Access to metadata Writer :
    • Most during, backup operations, a requester uses IVssBackupComponents: GetWriterMetadata to Obtain an instance of the IVssExamineWriterMetadata interface to allow access to the metadata of a Currently executing writer.
    • For restore operations, or shadow copy backups using imported, a requester retrieve XML document containing the year and uses metadata CreateVssExamineWriterMetadata to Obtain year IVssExamineWriterMetadata interface Which it uses to read the restore metadata.

  4. #4
    Join Date
    May 2008
    Posts
    4,085

    Re: What are Writer Metadata Document Life Cycle?

    Writer Metadata Documents enable the requester performing a backup to learn about writers Currently executing during the discovery phase of a backup. For Those writers phrasal to Participate in a backup, a requester imports much, but not all, of the information in the Writer Metadata Document Into own its Backup Components Document during the discovery phase of a backup. However, only Writer Metadata Documents and not the Backup Components Document contains the path and file specifications.

  5. #5
    Join Date
    Apr 2008
    Posts
    3,267

    Re: What are Writer Metadata Document Life Cycle?

    In addition, only Explicitly included components Have Their Information Stored in the Backup Components Document DURING a backup operation. Information is implicitly included components Is Not included in the Backup Components Document DURING a backup operation, and Must Be interpolated using information about the Explicitly included components available and the Writer Metadata Documents.

  6. #6
    Join Date
    Aug 2006
    Posts
    162

    Re: What are Writer Metadata Document Life Cycle?

    Implicitly included components May Still Be selectable for restore and May Need To Be Explicitly included in the Backup Components Document at restore time. In this case, just as Adding a component DURING a backup operation required access to the component's writer's Writer Metadata Document, a requester Will require access to a copy of That Writer's Writer Metadata Documents Stored at backup time. Therefor, the only Way to Obtain all the information about all the files and components Involved in a backup or restore is to have each Writer Metadata Document For Each writer participant Stored in a backup Along with the Backup Components Document.
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