Enterprise Vault™ Introduction and Planning
- About this guide
- Overview of Enterprise Vault
- How Enterprise Vault works
- About Enterprise Vault indexing
- About Enterprise Vault tasks
- About Enterprise Vault services
- About the Archive Discovery Search Service
- About the Enterprise Vault Outlook Add-In
- About Enterprise Vault Search
- Enterprise Vault administration
- About reporting and monitoring in Enterprise Vault
- Exchange Server archiving
- About Exchange Server archiving and user mailboxes
- Exchange Server and journal mailbox archiving
- Exchange Public Folder archiving
- File System Archiving
- Archiving Microsoft SharePoint servers
- Domino mailbox archiving
- Domino Journal archiving
- SMTP Archiving
- Skype for Business Archiving
- Enterprise Vault Accelerators
- About Compliance Accelerator
- The Compliance Accelerator client application
- About Discovery Accelerator
- Discovery Accelerator client application
- Building in resilience
- About Enterprise Vault and VCS
- About Enterprise Vault and Windows Server Failover Clustering
- About Enterprise Vault building blocks
- Planning component installation
- Where to set up the Enterprise Vault Services and Tasks
- Installation planning for client components
- Planning your archiving strategy
- How to define your archiving policy for user mailboxes
- How to plan the archiving strategy for Exchange public folders
- How to plan settings for retention categories
- How to plan vault stores and partitions
- About Enterprise Vault reports
How to plan single instance storage
Enterprise Vault can use single instance storage to optimize archive storage space. Enterprise Vault's single instance storage mechanism archives a single instance of parts of an item that are suitable for sharing, such as large message attachments. Enterprise Vault can share the single instance storage parts (SIS parts) within a vault store, or across two or more vault stores within a vault store group. A vault store group forms an outer boundary for sharing.
If you use Enterprise Vault's single instance storage mechanism, you need to create a sharing regime that meets your organization's data sharing requirements and which is appropriate for your network connection speeds. Consider what sort of sharing regime you require before you start archiving. Enterprise Vault cannot share items retrospectively. Also there are limits to what you can change after Enterprise Vault has started sharing items.
Note the following:
. Enterprise Vault single instance storage is not performed when items are stored to partitions that are hosted on Dell EMC Centera devices. You can configure a partition for a Dell EMC Centera device to use the Centera's device-level sharing mechanism, if required. Enterprise Vault then stores the shareable parts of a saveset as separate data blobs, so that the Centera device is able to share them.
. Enterprise Vault shares the SIS parts between items in the same smart partition, but it does not share the SIS parts between a smart partition and other partitions.
For example, suppose that two employees receive the same email, which has an attachment. For compliance reasons, Enterprise Vault archives one employee's emails to a smart partition; it archives the other employee's emails to the standard vault store partition. If Enterprise Vault first archives the email and its attachment to the standard partition then, when it subsequently archives the email to the smart partition, it should not normally archive the attachment again. This would mean that the data on the smart partition is not fully compliant, however, so in this case Enterprise Vault archives both the email and the attachment again.
For more information about setting up single instance storage, see "Setting up Storage" in Installing and Configuring.