VMware VCLOUD SDK FOR JAVA 1.0 - DEVELOPER S GUIDE Manuale Utente Scaricare il pdf (Pagina 26)

Hybrid Cloud Application Architecture

Deployment Guide 24

Creating the pool

To create the pool, use the procedure Creating the pool, on page 13. Give

the pool a unique name. In our example we used petshop_http. 

Important: Do NOT add any members to this pool. After Step 7, click the

Finished button.

Creating the profiles

To create the profiles, use the following procedures. Note that we configure

an new Statistics Profile.

• Creating an HTTP profile, on page 15

• Creating the TCP profile, on page 15

• Optional: Creating persistence profile, on page 16

• Creating a OneConnect profile, on page 17

Creating the Statistics profile

In this procedure, we create a Statistics profile. In our deployment scenario

there are two distinct scaling actions that take place and are initiated by our

workflow process according to our established business rules. We define the

vertical scaling action as an event that our workflow process executes to

initially activate and begin consuming public cloud resources. We define the

horizontal scaling action as an event that our workflow process executes to

deploy additional application capacity in the public cloud. These state

changes and capacity operations are affected using the VMware vCloud API

and the F5 iControl API.

The two rules governing our infrastructure operations are:

1. When 40% of the orders confirmed in the system over a one minute

period exceed 15ms of processing time activate public cloud

resources.

2. vApp systems running in the public cloud shall accept a maximum

number of 30 connections at any given time.

In measuring application response time, we build a histogram using a

Statistics profile and an iRule, then our workflow process periodically

retrieves the values using iControl. The Statistics profile is composed of

fields for response time ranges, each with a counter in it. The rages are

<5ms, 5-7ms, 7-12ms, 12-15ms, and >15ms. The iRule to appropriately

increment these counters according to the order confirmation page latency is

in the following procedure.

Important

You must follow this procedure exactly as described below, including all

names and fields. If you do not, the iRule you create in the following section

will not work correctly.

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VMware VCLOUD SDK FOR JAVA 1.0 - DEVELOPER S GUIDE Manuale Utente Pagina 26