The Global Statistics page for the Public Zone outlines the resolution status for all domain names that have network traffic analysis enabled. You can use this feature to view global resolution trends and overall performance metrics.
Scenarios
Assess the overall health of your DNS resolution service.
Monitor change trends in global resolution volume.
Evaluate the overall resolution success rate.
Analyze the distribution of global request types and resolution quality.
Procedure
Go to the Alibaba Cloud DNS - Statistics Dashboard.
Go to the Resolution Dashboard > Public Zone tab.
The Global Statistics tab is displayed by default.
You can also switch the DNS resolution cluster using the drop-down list in the upper-right corner of the module.
Features
The data for the Global Statistics feature is collected from domain names that have DNS network traffic analysis enabled. Ensure that DNS network traffic analysis is enabled for at least one domain name.
1. Overview
This section displays the following metrics:
Metric Name | Description |
Total resolutions in the last 24 hours | Displays the total number of resolution requests in the last 24 hours and provides a day-over-day comparison. You can use this metric to evaluate the overall load of the resolution service. |
Average resolution success rate in the last 24 hours | Displays the average resolution success rate in the last 24 hours and provides a day-over-day comparison. You can use this metric to evaluate the availability and stability of the resolution service. |
You can perform the following operations:
Click Set Period to set the statistical period for the overview data, such as daily, weekly, or monthly.
In the upper-right corner of the page, switch the DNS resolution cluster from the drop-down list.
Click Alert Notifications to configure alert notification rules.
2. Statistics Details
This section provides data analytics from the following three dimensions:
Query Volume
This section displays trend charts for request volume metrics, such as queries per second (QPS). You can use these charts to analyze the distribution and peak values of resolution request volumes over time.
Rtype and Rcode Analysis
This section displays data on request and response features, such as request type statistics and negative response type statistics. You can use this data to analyze the composition of DNS requests and the characteristics of their responses.
Request type statistics
Negative response type statistics
Type descriptions:
NXDOMAIN (Non-Existent Domain): The queried domain name does not exist.
NXRRSET: The domain name exists, but the requested record type (RRset) does not. This is also known as a NODATA scenario.
SERVFAIL (Server Failure): The query could not be processed because of a problem with the target DNS server.
REFUSED: The DNS server refuses to perform the specified operation for policy reasons. For example, the server may refuse to provide resolution to a specific requester or perform a specific operation on the specified data, such as a zone transfer.
You may want to provide resolution for specific requesters, or prevent certain operations, such as a zone transfer, on specified data.
FORMERR (Format Error): The DNS server could not interpret the query request.
NOTIMP (Not Implemented): The DNS server does not support the requested query type.
Click a negative response type card.
The table in the upper-right section aggregates data by domain name and displays the data in descending order of detection count.
Click View in the Actions column for a domain name. The table in the lower-right section then aggregates data by source address and displays the data in descending order of detection count.
Resolution Quality Metrics
This section displays metric data and trend charts related to resolution quality. You can use this information to evaluate the response quality and performance of the resolution service.
How resolution success rate is calculated
Resolution success rate = Number of valid responses that match the requested record type (QTYPE) / Total number of resolutions
Valid response: A response that contains resource record data that matches the requested type. For example, a request for an A record is successful if an IPv4 address is returned. The request is considered failed if the response is an NXDOMAIN, NODATA, or another status that does not include an A record. Similarly, a request for an AAAA record is successful only if an IPv6 address is returned.
Recommendation: The resolution success rate is used to measure the stability and availability of the resolution service. This metric is heavily influenced by invalid queries because the domain names and record types that clients query cannot be controlled. For example, a client might query for randomly generated, non-existent domain names. In general, a stable curve indicates normal performance. You do not need to aim for the highest possible value. Instead, you should consider this metric as one part of a comprehensive analysis.
