Symantec 7 User Manual
Table 1-1
NetBackup deduplication options (continued)
Description
Type
NetBackup PureDisk is a deduplication solution for
bandwidth-optimized backups of data in remote offices. You
can use PureDisk to reduce the amount of backup data that is
stored in a datacenter by NetBackup.
bandwidth-optimized backups of data in remote offices. You
can use PureDisk to reduce the amount of backup data that is
stored in a datacenter by NetBackup.
You use PureDisk interfaces to install, configure, and manage
the PureDisk servers, storage pools, and client backups. You do
not use NetBackup to configure or manage the storage or
backups.
the PureDisk servers, storage pools, and client backups. You do
not use NetBackup to configure or manage the storage or
backups.
PureDisk has its own documentation set.
See the NetBackup PureDisk Getting Started Guide.
A PureDisk storage pool can be a storage destination for both
the NetBackup Client Deduplication Option and the NetBackup
Media Server Deduplication Option.
the NetBackup Client Deduplication Option and the NetBackup
Media Server Deduplication Option.
PureDisk deduplication
How deduplication works
Deduplication is a method of retaining only one unique instance of backup data
on storage media. Redundant data is replaced with a pointer to the unique data
copy. Deduplication occurs on both a file level and a file segment level. When two
or more files are identical, deduplication stores only one copy of the file. When
two or more files share identical content, deduplication breaks the files into
segments and stores only one copy of each unique file segment.
on storage media. Redundant data is replaced with a pointer to the unique data
copy. Deduplication occurs on both a file level and a file segment level. When two
or more files are identical, deduplication stores only one copy of the file. When
two or more files share identical content, deduplication breaks the files into
segments and stores only one copy of each unique file segment.
Deduplication significantly reduces the amount of storage space that is required
for the NetBackup backup images.
for the NetBackup backup images.
is a diagram of file segments that are deduplicated.
Figure 1-2
File deduplication
A
C
B
D
E
A
Q
B
D
L
Client files
to back up
to back up
A
C
B
D
E
Q
L
File 1
File 2
Data written
to storage
to storage
Introducing NetBackup deduplication
About NetBackup deduplication
About NetBackup deduplication
14