out_s3: Add an instruction for enabling parquet compression

Signed-off-by: Hiroshi Hatake <[email protected]>

Author: cosmo0920

pipeline/outputs/s3.md

@@ -45,7 +45,8 @@ The [Prometheus success/retry/error metrics values](../../administration/monitor
 | `sts_endpoint` | Custom endpoint for the STS API. | _none_ |
 | `profile`   | Option to specify an AWS Profile for credentials.   | `default` |
 | `canned_acl` | [Predefined Canned ACL policy](https://docs.aws.amazon.com/AmazonS3/latest/dev/acl-overview.html#canned-acl) for S3 objects. | _none_ |
-| `compression` | Compression type for S3 objects. `gzip` is currently the only supported value by default. If Apache Arrow support was enabled at compile time, you can use `arrow`. For gzip compression, the Content-Encoding HTTP Header will be set to `gzip`. Gzip compression can be enabled when `use_put_object` is `on` or `off` (`PutObject` and Multipart). Arrow compression can only be enabled with `use_put_object On`. | _none_ |
+| `compression` | Compression/format for S3 objects. Supported: `gzip` (always available) and `parquet` (requires Arrow build). For `gzip`, the `Content-Encoding` header is set to `gzip`. `parquet` is available **only when Fluent Bit is built with `-DFLB_ARROW=On`** and Arrow GLib/Parquet GLib are installed. Parquet is typically used with `use_put_object On`. | *none*  |
+
 | `content_type` | A standard MIME type for the S3 object, set as the Content-Type HTTP header. | _none_ |
 | `send_content_md5` | Send the Content-MD5 header with `PutObject` and UploadPart requests, as is required when Object Lock is enabled. | `false` |
 | `auto_retry_requests` | Immediately retry failed requests to AWS services once. This option doesn't affect the normal Fluent Bit retry mechanism with backoff. Instead, it enables an immediate retry with no delay for networking errors, which can help improve throughput during transient network issues. | `true` |
@@ -649,3 +650,54 @@ The following example uses `pyarrow` to analyze the uploaded data:
 3  2021-04-27T09:33:56.539430Z    0.0     0.0       0.0         0.0          0.0            0.0
 4  2021-04-27T09:33:57.539803Z    0.0     0.0       0.0         0.0          0.0            0.0
 ```
+
+## Enable Parquet support
+
+### Build requirements for Parquet
+
+To enable Parquet, build Fluent Bit with Apache Arrow support and install Arrow GLib/Parquet GLib:
+
+```bash
+# Ubuntu/Debian example
+sudo apt-get update
+sudo apt-get install -y -V ca-certificates lsb-release wget
+wget https://packages.apache.org/artifactory/arrow/$(lsb_release --id --short | tr 'A-Z' 'a-z')/apache-arrow-apt-source-latest-$(lsb_release --codename --short).deb
+sudo apt-get install -y -V ./apache-arrow-apt-source-latest-$(lsb_release --codename --short).deb
+sudo apt-get update
+sudo apt-get install -y -V libarrow-glib-dev libparquet-glib-dev
+
+# Build Fluent Bit with Arrow:
+cd build/
+cmake -DFLB_ARROW=On ..
+cmake --build .
+
+### Testing Parquet compression
+
+
+```md
+## Testing (Parquet)
+
+Example configuration:
+
+```yaml
+service:
+    flush: 5
+    daemon: Off
+    log_level: debug
+    http_server:  Off
+
+pipeline:
+  inputs:
+    - name:  dummy
+      tag:   dummy.local
+      dummy {"boolean": false, "int": 1, "long": 1, "float": 1.1, "double": 1.1, "bytes": "foo", "string": "foo"}
+
+  outputs:
+    - name: s3
+      match:           dummy*
+      region:          us-east-2
+      bucket:          <your_testing_bucket>
+      use_put_object:  On
+      compression:     parquet
+      # other parameters
+```