Compaq 307560-001 Performance Analysis and Capacity Planning for Microsoft Sit - Page 8

WHITE PAPER (cont.) 8... Table 2: ILS Operations Measured ILS Operation Definition and Comments Connect Add Direct Lookup Connection to the ILS directory service. This operation must be done before any application can use ILS and is always done at least once by all ILS applications. The performance of the LDAP command sequence CONNECT, BINDSIMPLE ANONYMOUS, and QUIT was measured to simulate this operation. Note, LDAP requires that CONNECT and a form of BIND are always paired and that a QUIT must be issued before another CONNECT from the same client. ** Add a new online user to the ILS directory. This operation is done after a Connect operation to make the new user accessible to ILS applications. It is done only once by an ILS application, typically just after the connection is made. We measured performance by doing one LDAP CONNECT and one BINDSIMPLE ANONYMOUS, then issuing 100 LDAP ADD commands, and then issuing an LDAP QUIT command. ** Search the ILS directory for a specified user. It must be done after a Connect operation. This is typically the most frequent ILS operation. We measured performance by doing one LDAP CONNECT and one BINDSIMPLE ANONYMOUS, then issuing 100 ILS SEARCH RETURN ALL commands looking for a random user, and then issuing an LDAP QUIT command. ** ** Disk performance is not a significant factor affecting ILS performance, and the amount of memory on a system is not a significant factor affecting PS performance. ILS User Scenario With a goal of determining how many users the SUT can support, a scenario to represent a typical ILS user was developed (see Table 3). Table 3: ILS User Scenario Operation # ILS Command 1 Connect 2 Bind anonymous 3 Retrieve directory 4 Direct Lookup 5 Direct Lookup 6 Direct Lookup 7 Direct Lookup 8 Direct Lookup 9 Direct Lookup Comment Connect to the ILS server Start ILS services Get a listing of all online users Find a specific user Find a specific user Find a specific user Find a specific user Keep this user online Keep this user online Other user scenarios are possible and different scenarios may produce varied platform transaction capacities. For this reason, an Excel spreadsheet computing platform transaction capacities based on different user scenarios has been provided in Appendix A of this paper.