Add parallelism

docs/DETAILS.md

@@ -142,6 +142,7 @@ types:
 - **`--password`**: SSH password
 - **`--key-file`**: SSH private key file path
 - **`--port`**: SSH port (default: `22`)
+- **`--parallel`**: Maximum number of devices to process in parallel (default: `10`)
 
 ### Examples
 
@@ -160,6 +161,9 @@ ipng-router-backup --yaml config.yaml --output-dir /backup/network
 
 # With password authentication
 ipng-router-backup --yaml config.yaml --password mypassword
+
+# Process more devices in parallel
+ipng-router-backup --yaml config.yaml --parallel 20
 ```
 
 ## SSH Authentication

docs/ipng-router-backup.1

@@ -35,6 +35,9 @@ SSH port number (default: 22)
 .BR --host " \fIHOSTNAME\fR"
 Specific host(s) or glob patterns to process (can be repeated, processes all if not specified)
 .TP
+.BR --parallel " \fINUMBER\fR"
+Maximum number of devices to process in parallel (default: 10)
+.TP
 .BR --help
 Show help message
 .SH CONFIGURATION
@@ -98,6 +101,11 @@ Process hosts matching patterns:
 .EX
 ipng-router-backup --yaml config.yaml --host "asw*" --host "*switch*"
 .EE
+.TP
+Process devices in parallel:
+.EX
+ipng-router-backup --yaml config.yaml --parallel 20
+.EE
 .SH FILES
 .TP
 .I /etc/ipng-router-backup/config.yaml.example