CommVault® Single Instance Store (SIS)
Increase Data Retention Periods on Disk without Increasing Physical Disk Requirements
To expand on the benefits of disk-based data management, Single Instance Store (SIS) eliminates duplicate copies of files and attachments found in backups and archives stored on disk. SIS does this by comparing the contents of files to find duplicates; matches are not affected by any differences in file names, properties or attributes. This method ensures that exact digital duplicates can be matched and eliminated across data sets, applications, clients and OS platforms, maximizing compression benefits. As new backup and archive copies are made on weekly cycles, the compression ratio continuously improves as the number of duplicate files avoided continues to increase.
As shown in the figure, the SIS capability is especially helpful for:
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Eliminating duplicate files across backup cycles
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Eliminating duplicate files across backup and archive copies
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Consolidating tape copies of data to SIS disk copies for search and discovery
SIS capabilities can apply to primary backup and archive copies of data, as well as to secondary copies created by Storage Policies. As logical copies of data are aged and pruned, reference links to the single physical copy are eliminated until none remain, after which the physical copy is also removed.
CommVault SIS is more flexible than de-duplication technologies, which cannot be used with compression or encryption capabilities. SIS also requires less processing on client systems at remote sites, works with any hardware to deliver immediate benefits, and can be used with special-purpose de-duplication appliances.
Singular_Information_Management_Brochure Commvault Galaxy Data Sheet