Optional:    true,
		},
		config.HelpKV{
			Key:         Endpoint,
			Type:        "string",
			Description: "remote cache endpoint for GET/HEAD object(s) metadata, data" + defaultHelpPostfix(Endpoint),
			Optional:    true,
		},
		config.HelpKV{
			Key:         BlockSize,
			Type:        "string",

			Optional:    true,
			Type:        "number",
		},
	}

	HelpMySQL = config.HelpKVS{
		config.HelpKV{
			Key:         target.MySQLDSNString,
			Description: `MySQL data-source-name connection string e.g. "<user>:<password>@tcp(<host>:<port>)/<database>"`,
			Optional:    true,
			Type:        "string",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         target.MySQLTable,