To get to this page: Select Option Profiles from the left menu. Go to New > Option Profile or select a profile to edit. On the Map tab, under Performance, click Configure.
Configure map performance settings to determine the intensity and speed in which the service maps netblocks. The overall map performance level determines the number of netblocks to map in parallel, the number of IPs included in each netblock, and the delay between groups of packets sent to each netblock. When you select a pre-defined performance level from the Overall Performance menu, individual performance settings are automatically updated based on your selection. If you select Custom, you can customize each of the individual performance settings.
Map performance settings only apply when mapping a domain with a specified netblock or netblocks. If the domain does not have a netblock defined, only the packet delay option is relevant. If you do not currently have a netblock defined and would like to take advantage of these performance settings, it is recommended that you run a map on your domain and identify the netblock from the map results. Then add the netblock to the domain's configuration.
Note that map performance settings are optimized for adjusting performance when mapping netblocks that are greater than 4 Class C networks. These settings will have little effect when mapping smaller netblocks.
There are three pre-defined performance levels to choose from: High, Normal and Low. Select one of these levels or select Custom to customize performance settings.
• High. The High performance level is optimized for speed. As compared to the other levels, more netblocks are mapped in parallel, the netblocks contain fewer IPs so the processing is quicker, and the delay between groups of packets sent is shorter. Maps at a High performance level may be faster to complete but may overload firewalls and other networking devices.
• Normal. The Normal performance level is recommended as best practice in most cases. Maps at a Normal performance level are well balanced between intensity and speed.
• Low. The Low performance level is optimized for low bandwidth network connections. As compared to the other levels, fewer netblocks are mapped in parallel, the netblocks contain more IPs, and the delay between groups of packets sent is longer. Maps at a Low performance level may take longer to complete.
• Custom. The Custom performance level allows you to change one or more performance settings. Performance settings should only be customized under special circumstances by users with an in-depth knowledge of the target network and available bandwidth resources.
The following settings may have an impact on your network bandwidth. These settings do not affect responsiveness for individual hosts and services. If your network or network devices become overloaded, adjust these settings accordingly.
External Scanners. The maximum number of netblocks to map at the same time per external scanner.
Scanner Appliances. The maximum number of netblocks to map at the same time per scanner appliance. If you do not have scanner appliances, then disregard this setting.
Netblock Size. The maximum number of IPs per netblock being mapped. The netblock specified for the domain is broken into smaller netblocks for processing. Each of these smaller netblocks equals a single map process. Use this setting to define how many IPs should be included in each process.
Example: Let's say you're mapping a Class B network (64000 IPs) using the Normal performance level. For the Normal performance level, the netblock size is set to 16384 IPs which means that the Class B range will be split into 4 netblocks. A separate map process will handle each of these smaller netblocks, which completes faster than if you mapped all 64000 IPs in a single process.
Packet (Burst) Delay. Each level represents the delay between groups of packets sent to the netblocks being mapped. A short delay means that packets are sent more frequently, resulting in more bandwidth utilization and a shorter mapping time. A long delay means that packets are sent less frequently, resulting in less bandwidth utilization and a longer mapping time. The packet delay is set in seconds. Each performance level has been assigned a delay time appropriate for the performance level.