Updated istio doc to reflect changes#214
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does istio need to be capitalized everywhere?
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| ### Telemetry | ||
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| The running application has the default distributed tracing implementation that istio provides. These metrics are provided by default when running on an istio enavbled environment. No extra configuration is needed. Microprofile supplements istio's [metrics](https://istio.io/docs/reference/config/policy-and-telemetry/metrics/) with it's own [metrics](https://github.com/eclipse/microprofile-metrics) data. |
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| The Microprofile Spec provides fault tolerance policies that allow for timeout, retry, bulkhead, circuit breaker, and fallback properties to be configured. With the exception of fallback, istio also provides these policies. The BlueCompute application makes use of the microprofile timeout, retry, and fallback policies. | ||
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| Even though the MP fault tolerant policies are configured at the application level, it is fairly easy to disable and replace them with the istio implementation. The Blue Compute application demonstrates this with the timeout policy. When istio is enabled for the application, a config map property is passed to the application that disables the MP timeout policy, and instead enables a timeout policy that is configured at the istio level, avoiding a conflict that multiplies the configured time out level when both the MP and Istio policies are enabled. |
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