Application Server Matrix

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Application Server Matrix

Application Server Matrix
Department
Total number of servers
Application Server Type (i.e. Clustered or mirrored)
Estimated Storage Capacity
Estimated Bandwidth (Percent)
Totals
Medical Records
5
Clustered/Mirrored
1 TB 17 Customer Billing 2 Clustered
200 MB 2 Human Resources
2
Clustered 200 MB 2 Pharmacy
2
Mirrored
200 MB 2 Facilities Management
1
Single Server
100 MB
1

Housekeeping 1 Single Server 100 MB 1 Food Services 1 Single Server
100 MB
3

Purchasing
1
Single Server
100 MB
2

3 Wards, plus Maternity & Surgery
2
Clustered, integrates with other depts.
500 MB
15

Admitting 1
Single Server 200 MB
2

Percentage of total available bandwidth used (assuming peak usage) = 47%
Givens and Assumptions:
150 Patients at any given time
Patient files are accessed 5 times per day (but only in the period of 7am-7pm)
Average patient file size is 100 MB (including medical images)
100 Mbps Ethernet throughout the building

Using these assumptions, the medical records bandwidth estimation can be made by using the follow formula: Where A is the number of KB transferred in an operation (100 MB = ~100,000 KB)
B is the number of operations per second performed (5 accesses/day * 150 patients = 600 accesses/day. 600 accesses/day *1/86400 days/second * 2 (files only accessed in a 12 hour period) = .0139 operations per second

C is the total bandwidth available in Mbps (according to the Microsoft website, a 100 Mbps Ethernet can expect roughly 80 Mbps of actual bandwidth)

Using the formula on the previous page, we come up with a Bandwidth percentage of roughly 17%. Of that 17%, 15% is used by the 3 Wards of the hospital, with the other 2% being occupied by the Billing, Pharmacy, and Food Services Departments.

The remaining bandwidth and storage capacity estimations are just assumptions based around the notion of whether or not their files will contain images or text-only files, while some departments (like Food Services) are
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