Reference Guide

4 Service Infrastructure
This chapter describes the service level of HP ePrint Enterprise, assisting IT professionals with dimension
deployments. It also describes how the system behaves in situations of peak and stress, which helps
understand the limitations of the system.
4.1 Assumptions
All performance and load analysis stated in this chapter are based on a set of assumptions which attempt to
describe a real use scenario. This means that any deviation from these assumptions will necessarily impact
the actual results observed during normal use.
For this analysis, the following assumptions were made:
4.1.1 Average Print Job (APJ)
An APJ refers to the average computational power necessary to transfer, open, render, and print any one of
the following files:
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Microsoft Word document: .docx, 14 pages, 3 images, 8,000 characters, 505 KB.
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Microsoft Excel spreadsheet: .xlsx, 3 tabs, 116 KB.
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Adobe PDF file: 8 pages, 830 KB.
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JPG image: 2512 x 2011 resolution, 612 KB.
Although each file is different in size and complexity of processing, in practical terms, this service level
analysis assumes that the files are sent to HP ePrint Enterprise using an equal distribution (e.g., in a batch of
100 files, 25 of each). The job unit under analysis (from this point forward, called APJ) is, in fact, the average
job generated by the combination of these four samples.
4.1.2 Hardware profile
The hardware assumed in this analysis refers to the following configuration:
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Dual Core 2.0 GHz Intel® Xeon®
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2GB of RAM
Increases of memory and processing power do not represent equivalent improvement in performance or
service level. Lower levels of the same resources (less memory or slower processors), however, have an
observable degradation on service level, leading to the conclusion that the above described configuration
should be considered as optimal for HP ePrint Enterprise. Increases of performance beyond these levels
should be addressed by other means (i.e. scalability through primary and secondary server deployments. See
the Scalability chapter in this document for details).
4.1.3 Network conditions
The average round trip time considered for 32-byte packets between HP ePrint Enterprise server and the
printer is 250ms.
12 Chapter 4 Service Infrastructure