The suppression of duplicate content potentially reduces
the storage space that is required to store content. Content Platform Engine suppresses duplicate
content by checking the existing content before adding new content
to the storage area. If identical content exists, the new content
is not stored separately from the existing content. If no identical
content exists, the new content is added in the normal manner. An
example of when suppressing duplicate content might help reduce the
required storage space is when archiving email messages to a Content Platform Engine object store.
Suppressing duplicate content might decrease storage space
requirements but it also slightly increases processing time. To help
you determine whether your space savings make the trade-off worthwhile,
Content Platform Engine provides storage statistics
for each server. . The statistics include the following items:
- The number of duplicate content elements uploaded and then discarded
as already present
- The number of requests to delete content elements that did not
result in deletion of the actual content.
Restriction: - Content duplication suppression does not apply to fixed storage
areas.
You can suppress duplicate content for the following storage
areas: file storage areas and database storage areas.
- Content encryption potentially affects the suppression of some
duplicate content.
For duplicate suppression purposes, enabling
(or reenabling) content encryption for a storage area with the
Encrypt
Content property divides the content into two parts: the
preexisting content as one part and the content that you add after
you enable encryption as the other part. Across such a division,
Content Platform Engine does not recognize
or suppress identical content for the following reasons:
- The stored form of content when encrypted differs from the stored
form of the same content when unencrypted.
- The stored form of content when encrypted with one encryption
key differs from the stored form of the same content when encrypted
with another encryption key. (Content Platform Engine generates a new encryption
key for a storage area when you reenable encryption.)
Within these content divisions, content encryption does
not affect the suppression of duplicate content. For example, for
any content that you add after enabling encryption, the content is
suppressed in the same way as would have been the case without encryption.