3
To avoid logjams, customers often add
media servers equipped with greater
CPU and memory resources (see
Figure 2). While this approach spreads
out the extra load, it also obviously
increases complexity and costs.
Appliance-based deduplication
Because purpose-built backup to disk
appliances absorb deduplication and
replication workloads, current backup
environments can remain unchanged.
Complexity is avoided because there
is no need to beef up the number
and horsepower of media servers
(see Figure 4).
With appliance-based
deduplication, there
is no need to beef
up the number and
horsepower of media
servers.
Figure 3. Appliance-based
deduplication puts no extra load on the
media server.
Purpose-built backup to
disk appliances absorb
deduplication and
replication workloads, so
the media server workload is
limited to:
• Processing client backup data
• Creating tape copies from disk
Figure 2. With software-based deduplication, avoiding logjams requires adding
more media servers, which increases costs and complexity.
SAN or local storage 10 / 15K
Media server 1
Media server 2
Media server 3
Media server 4
Media server 5
Media server 6
Client 1 Client 2 Client 3 Client 100
