Added data retention and restructured

Author: ntrogh

articles/load-testing/resource-limits-quotas-capacity.md

@@ -12,24 +12,50 @@ ms.date: 08/30/2022
 
 # Service limits in Azure Load Testing Preview
 
-This section lists basic quotas and limits for Azure Load Testing Preview.
+Azure uses limits and quotas to prevent budget overruns due to fraud, and to honor Azure capacity constraints. Consider these limits as you scale for production workloads. In this article, you learn about:
+
+- Default limits on Azure resources related to Azure Load Testing Preview.
+- Requesting quota increases.
 
 > [!IMPORTANT]
 > Azure Load Testing is currently in preview. For legal terms that apply to Azure features that are in beta, in preview, or otherwise not yet released into general availability, see the [Supplemental Terms of Use for Microsoft Azure Previews](https://azure.microsoft.com/support/legal/preview-supplemental-terms/).
 
-## Limits
+## Default resource quotas
+
+In this section, you learn about the default and maximum quota limits.
+
+### Test engine instances
+
+The following limits apply on a per-region, per-subscription basis.
+
+| Resource  | Limit | 
+|---------|---------| 
+| Concurrent engine instances |    100     |
+| Engine instances per test run | 45 |
+
+### Test runs
 
-|Resource  |Limit  |
+The following limits apply on a per-region, per-subscription basis.
+
+| Resource  | Limit |
+|---------|---------|
+| Concurrent test runs | 25 |
+| Test duration | 3 hours |
+
+### Data retention
+
+When you run a load test, Azure Load Testing stores both client-side and [server-side metrics](./how-to-monitor-server-side-metrics.md) for the test run. Azure Load Testing has a per-test-run limit on the retention period for this data:
+
+| Resource  | Limit |
 |---------|---------|
-|Maximum concurrent engine instances that can be utilized per region per subscription     |    100     |
-|Maximum concurrent test runs per region per subscription     |    25     |
-|Maximum engine instances per test run | 45 |
-|Maximum test duration | 3 hours |
-|Data retention policy | 90 days |
+| Server-side metrics | 90 days |
+| Client-side metrics | 365 days |
+
+The test run associated with the load test isn't removed.
 
-## Increase quotas
+## Request quota increases
 
-You can increase the default limits and quotas by requesting the increase through an [Azure support request](https://portal.azure.com/#blade/Microsoft_Azure_Support/HelpAndSupportBlade/newsupportrequest).
+To raise the limit or quota above the default limit, [open an online customer support request](https://portal.azure.com/#blade/Microsoft_Azure_Support/HelpAndSupportBlade/newsupportrequest) at no charge.
 
 1. Select **create a support ticket**.