Before NAS and SANs were widely deployed, servers were typically dedicated to a single app, and storage was
dedicated to a single server. Storage utilization for database servers would be high, while storage for most other
applications servers would often be grossly underutilized
App
OS
App
OS
App
OS
80%80%
App
OS
App
OS
App
OS
20% 90% 20%

According to a survey by Spiceworks, by 2016 well over half of small-medium companies were using
VMware hypervisors. In companies with over 500 employees, the percentage of companies using
hypervisors reached 80%
59%
62%
68%
74%
78%
82%
5% 5% 5% 6% 6% 8%
43% 43%
40% 39% 39% 38%
2% 2% 2% 2% 3% 3%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
1-50 51-100 101-250 251-500 501-1000 1,000+
VMware XenServer Hyper-V Other

vMotion traffic shares Ethernet network with
app servers
vMotion traffic isolated on FC-SAS storage
network
App
OS
App
OS
App
OS
App
OS
App
OS
App
OS
Ethernet
SAS
Ethernet FC
SAS

VMware Solution Exchange—ATTO Solutions
VMware UseYour Direct Attached Storage to Create a SAN Solution Brief
ATTOTurn DAS Storage Into a SAN Solution Brief
ATTO XstreamCORE SAN Controllers
ATTOTechnology, Inc.
IT Brand Pulse

frank.berry@itbrandpulse.com