Displaying the Spool Server
Hierarchy
Use
The spool servers are displayed in their hierarchical structure in the display of the spool server hierarchy. This display shows the relationships between real, logical, and alternative servers.
To call the display, start transaction SPAD, and, on the Devices/servers tab page, choose the Spool Servers pushbutton. A list of available spool servers appears. Click the name of the server for which you want to see the hierarchy, and choose one of the following display functions:
· Complete Hierarchy:
Use the 
Complete Hierarchy function to display
all server hierarchies that share any nodes. It shows the hierarchies of
logical servers and alternate servers that proceed from the server you mark.
It also shows all other spool server hierarchies that share one or more nodes
(server references) with the server you mark.
You display the complete hierarchy for the logical server LogServ1. It maps to real server host1_c11_01. If any other logical server or real server also references either of these servers ‑ host1_c11_01 or LogServ1 ‑ in its Mapping or Alternate server fields, then the Complete hierarchy display will also show you these hierarchies.
· Mapping Relationship:
By choosing Goto → Mapping Relationship, you display only the logical servers and alternate servers that proceed from the server that you select. In effect, you look "down" the server hierarchies from the point of view of the server you mark.
· Usage Relationship
By choosing Goto → Usage Relationship, you display all logical server and alternate server hierarchies that lead to the server that you mark. In effect, you look "up" the server hierarchies from the point of view of the server you select.
Structure
The relationships between the servers are shown in the display by vertical and horizontal lines. These lines have the following meanings:
· Horizontal Lines:
"Mapping relationships”, those from a logical server to another logical or real server, are shown with horizontal lines. The spool system follows these lines when it resolves a logical server into a real server that it can use for processing output requests.
· Vertical Lines:
“Alternative server relationships”, those from a real or logical server to a substitute or replacement server, are shown with vertical lines. The spool system follows these lines when it searches for an alternate server. This search can take place either when a server has become unavailable for processing output requests, or when load balancing is active.
Color Coding
The servers are highlighted in different colors. The legend for these colors is displayed directly below the hierarchy. The color coding in the spool server list has the following meaning:
· Active Server with Spool Work Process: This is a real spool server. It is active, has at least one spool work process, and can process output requests.
· Active Server with Assigned Spool Service: This is an active SAP spool server. However, it does not currently have any free spool work processes. It does have an alternate spool server that is able to substitute for it. Output requests assigned to this server are therefore processed by an alternate server.
· Logical Server with Assigned Spool Service: This is a logical server (a name representing a hierarchy of one or more servers). In its logical server and/or alternate server hierarchies (the Mapping and Alt. server fields, respectively), there is a real spool server that can process its output requests. Output requests assigned to this server are therefore processed by another server.
· Inactive Server with Assigned Spool Service: This is a real SAP spool server that is not currently active. However, a replacement spool server is specified in its hierarchy of Alternative Servers. Output requests assigned to this server are therefore processed by an alternate server.
· Server Without Assigned Spool Service: This is a logical or real SAP spool server whose output requests cannot currently be processed. If it is a logical server, then there is no active server in its server hierarchies. If it is a real server, then neither the server nor any alternate server is available for processing output requests.
· Passive Server with Assigned Spool Service: Passive servers are servers that are to be stopped in a controlled manner; that is, passive servers do not accept any new requests, but process the existing requests. However a replacement spool server is specified in the alternative server hierarchy of the passive server with assigned spool service. This alternative server can process new output requests that are assigned to this server.
· Passive Server with Spool Service Without Assigned Spool -Service: This is a passive server with a spool service. However, it does not have a replacement server in its hierarchy. As passive servers do not accept any more spool requests and this passive server does not have an alternative server, new requests assigned to this server are no longer processed.
See also:
