The sharkGrid allows connected computers to participate in spot pattern recognition scans run from Wildbook for Whale Sharks. When you start a pattern matching scan for an encounter in Wildbook, you are actually creating a scanTask made up of individual comparisons called scanWorkItems. The scanWorkItems of a scanTask are executed in efficient, parallel groups that are distributed across the grid of computers. The results are reassembled once all comparisons are complete. Each encounter can have up to two active scanTasks: one for a left side pattern and another for a right side pattern.
Once you have extracted a spot pattern for an encounter, you can look for matches to it across a global set of patterns stored in Wildbok for Whale Sharks. To start looking for matches:
1. Select a left-side or right-side radio button from the Find Pattern Match form in the Action/Edit bar. 2. Click Start Scan.
Starting a pattern matching scan creates a new scanTask in sharkGrid. The scanTask is assigned a unique identifier defined as:
Note: There can be only one left-side scanTask and one right-side scanTask for an encounter, whether they are completed or uncompleted. If you decide to redo a spot pattern and scan for a match again, you must first delete the old scanTask if it still exists.
You can manage your scanTasks in the sharkGrid Administration page by selecting sharkGrid from the Administer menu (login required).
You can check the status of and view the results of scanTasks from the sharkGrid Administration page.
Pending scanTasks are scanTasks that are:
You can delete a pending scanTask by clicking the Delete button.
You can examine the results of a pending scanTask (and move it to “Completed” status) by clicking Write Result. The scanTask will subsequently appear in the Completed scanTasks table.
Completed scanTasks are scanTasks that have been successfully completed in sharkGrid and whose results have been written out for review.
You can delete a completed scanTask that you initiated by clicking the Delete button.
You can examine the results of a completed scanTask by clicking View.
Note: Please promptly delete any completed scanTasks after viewing the results. The latest results can always be reviewed from the relevant encounter page.
This section describes how sharkGrid operates and how users with various levels of access can change its behavior.
The creation and deletion of scanTasks occurs in a single queue. This means that if several users have simultaneously created new scanTasks or attempted to delete existing ones, these changes will occur one by one. A new create/delete scanTask operation will only start after the previous one in the queue has finished. Therefore, you may not see the results of a scanTask delete (i.e. the removal of the scanTask from the sharkGrid Administration page) immediately.
The number of scanTask additions/deletions in the queue for Administrator-level users is visible in this section of the sharkGrid Administration page:
You can view information about connected client nodes doing work in sharkGrid from this section of the sharkGrid Administration page:
The following information is available for each node:
Overall performance in sharkGrid is measured by:
From the sharkGrid Administration page, you can configure the following performance parameters if you have Administrator privileges: