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				. 'at the newest, and the daemon resumes from it at startup when it exists. With --set '
				. 'the set name is appended as a subdirectory.',
			{ 'default' => '/var/db/iforest_streamd', 'completion' => 'files' }
		],
		[
			'save-interval=i',
			'Seconds between periodic model saves (only when learning happened).',
			{ 'default' => 300 }
		],
		[ 'keep=i',       'Prune all but the newest N timestamped model files after each save.' ],
		[ 'f|foreground', 'Do not daemonize; log to stderr unless --log is given.' ],
		[
			'log=s',
			'Log file. Defaults to <model-dir>/streamd.log when daemonized; stderr in the foreground.',
			{ 'completion' => 'files' }
		],
		[ 'socket-mode=s', 'Octal permissions to chmod the socket file to (e.g. 0660).' ],
		[ 'threshold=f',   'Alternative decision threshold to use for the label field. 0 < $val < 1' ],

		# creation knobs, used only when <model-dir>/latest.json does not exist yet
		[ 'n=i',         'Number of isolation trees in the ensemble (new models only).' ],
		[ 'window=i',    'Sliding window size; 0 disables forgetting (new models only).' ],
		[ 'eta=i',       'max_leaf_samples: points a leaf accumulates before splitting (new models only).' ],
		[ 'growth=s',    "Leaf split-requirement growth, 'adaptive' or 'fixed' (new models only)." ],