docs: ask direct CDN users to set a user agent

docs/concepts/driver_registry.md

@@ -18,6 +18,13 @@ limitations under the License.
 
 dbc installs drivers from a "driver registry" which is an internet-accessible index of installable [ADBC driver](./driver.md) packages.
 
-By default, dbc is configured to communicate with Columnar's public and private driver registries. Most drivers will be from the public registry but some will be marked with a `[private]` label which means they're from the private registry. See [Private Drivers](../guides/private_drivers.md) for information on how to install and use private drivers.
+By default, dbc is configured to communicate with two driver registries: the public ADBC driver registry, which is affiliated with the [ADBC Driver Foundry](https://adbc-drivers.org) and hosted by Columnar, and Columnar's private driver registry. Most drivers will be from the public registry but some will be marked with a `[private]` label which means they're from the private registry. See [Private Drivers](../guides/private_drivers.md) for information on how to install and use private drivers.
+
+- Public: [https://dbc-cdn.columnar.tech](https://dbc-cdn.columnar.tech)
+- Private: [https://dbc-cdn-private.columnar.tech](https://dbc-cdn-private.columnar.tech)
+
+!!! note
+
+    If you access these registries without dbc, please set a user agent. See [Can I download drivers directly from the driver registries?](../getting_started/faq.md#can-i-download-drivers-directly-from-the-driver-registries).
 
 When you run a command like [`dbc search`](../reference/cli.md#search) or [`dbc install`](../reference/cli.md#install), dbc gets information about the drivers that are available from each configured registry by downloading its `index.yaml` or using a cached copy.

docs/getting_started/faq.md

@@ -35,3 +35,11 @@ ADBC is [Apache Arrow ADBC](http://arrow.apache.org/adbc), a cross-platform, dat
 ## Who makes dbc?
 
 dbc is built and maintained by [Columnar](https://columnar.tech).
+
+## Can I download drivers directly from the driver registries?
+
+Yes. We ask that you set an HTTP user agent that identifies your tool so we can understand how the registries are used:
+
+```console
+$ curl -A "my-tool/1.0 (+https://github.com/me/my-tool)" -O https://dbc-cdn.columnar.tech/index.yaml
+```

docs/guides/installing.md

@@ -48,7 +48,7 @@ teradata   [private] An ADBC driver for Teradata developed by Columnar
 ```
 <!-- /dbc-output -->
 
-The short names in lowercase on the left of the output are the names you need to pass to [`dbc install`](../reference/cli.md#install). These drivers are available from Columnar's [driver registry](../concepts/driver_registry.md).
+The short names in lowercase on the left of the output are the names you need to pass to [`dbc install`](../reference/cli.md#install). These drivers are available from the public ADBC [driver registry](../concepts/driver_registry.md).
 
 !!! note
 

docs/guides/private_drivers.md

@@ -18,7 +18,7 @@ limitations under the License.
 
 {{ since_version('v0.2.0') }}
 
-Most [drivers](../concepts/driver.md) available with [dbc](../index.md) are hosted on Columnar's public [driver registry](../concepts/driver_registry.md). However, some of the drivers you see when you run [`dbc search`](../reference/cli.md#search) may be marked with a `[private]` label.
+Most [drivers](../concepts/driver.md) available with [dbc](../index.md) are hosted on the public ADBC [driver registry](../concepts/driver_registry.md). However, some of the drivers you see when you run [`dbc search`](../reference/cli.md#search) may be marked with a `[private]` label.
 
 To install and use these drivers, you must:
 

docs/reference/analytics.md

@@ -4,13 +4,20 @@ Columnar collects basic, anonymized information in order to help us better under
 
 ## What data do we collect?
 
-When you use dbc to search for or install a driver, dbc communicates with Columnar's CDN which is hosted using [Amazon Web Services](http://aws.amazon.com). Requests to the CDN include information such as:
+When you use dbc to search for or install a driver, dbc sends requests to the [driver registries](../concepts/driver_registry.md) it's configured to use. By default, these are:
+
+- The public ADBC driver registry (https://dbc-cdn.columnar.tech), which is affiliated with the [ADBC Driver Foundry](https://adbc-drivers.org) and hosted by Columnar
+- Columnar's private driver registry (https://dbc-cdn-private.columnar.tech)
+
+Both registries are served from a CDN that Columnar operates on [Amazon Web Services](http://aws.amazon.com). Requests to the CDN include information such as:
 
 - IP address
 - dbc version
 - Operating system name and architecture (e.g., linux/amd64)
 - A non-reversible but stable per-machine ID and a random UUID (generated once per install)
 
+Tools that access the registries without dbc are asked to set a user agent that identifies them. See the [FAQ](../getting_started/faq.md#can-i-download-drivers-directly-from-the-driver-registries).
+
 ## Where does it get stored?
 
 The above data is stored as part of the normal recording of HTTP request logs to the CDN. Logs are stored in a private S3 bucket which is only accessible to authorized Columnar staff.