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Tab: Single Instance Store

The Single Instance Store function makes it possible to save storage space on the long-term memory when archiving a document multiple times in d.3/ecspand, since the document is physically stored only once.

During the check for duplicates, the RipeMD 256 hash procedure is applied, where a 256-bit hash value is created to compare the binary data.

Warning

In the following cases, documents are not considered by the Single Instance Store function:

  • The documents are stored together with signatures.

  • The target system is Governikus LZA.

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When the Single Instance Store function is activated, a message appears that must be accepted. Otherwise, the Single Instance Store function cannot be enabled.

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Note

Since the storage systems Centera (object-based), NetApp (block-based), HCP (object-based), Celerra (object-based), Silent Cube (object-based) and TSM/TIAM (object-based) already internally support the single instancing, it is recommended to disable single instancing in d.ecs storage manager and to use the functions of the storage system. This saves you storage space. Especially for block-based Single Instancing.