Test environment

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The test environment used for the process of suspending and resuming a Linux™ instance on IBM® System z® consisted of IBM system z hardware and various software running on Linux.

Hardware

Table 1 lists the hardware used to test suspending and resuming a Linux instance.
Table 1. Hardware used for Linux suspend and resume testing
System Operating System Number of systems Number of processors Memory in GB Network Architecture
z/VM® LPAR z/VM 5.4 1 10 10 GB + 2 GB One 1Gb OSA z10™ LPAR
Linux server SUSE SLES 11 6 or 11 1 or 2 768 MB (WAS) 650 MB (RDB) Shared OSA z/VM guest
The workload generating clients use two 4-way systems running Linux:
  • One system for creating the DayTrader workload
  • One system for creating the SwingBench workload

Software

Table 2 lists the software used to test suspending and resuming a Linux instance.
Table 2. Software used for Linux suspend and resume testing
Product Version and release Comments
DayTrader 2.0 ee5, r343 Use with normal database
WebSphere® ND 7.1 (31-bit)
  • Latest fix pack
  • The 31-bit version is used because a system of less than 2 GB does not require 64-bit
DB2® for Linux 9.7 Latest fix pack
z/VM 5.4 RSU 0902 Order number UM97540
Linux SUSE SLES 11 SP1 Latest update SP1
SwingBench 2.3.0.422 Use with read only database

Environment

Figure 1 illustrates the environment used to test the suspend and resume of a Linux instance.
Figure 1. Environment for the Linux suspend and resume versus CP STOP and BEGIN test, using a VSWITCH
Diagram of the test environment used to test Linux suspend and resume versus z/VM CP STOP and BEGIN commands. A z/VM LPAR houses several guests connected with a VSWITCH. Each guest runs identical software, the WebSphere Application Server and DB2. The OSA express connects the VSWITCH to the Performance network. The Performance network has two systems used to generate the workload, one running DayTrader and one running SwingBench.

Network

The network used to perform Linux suspend and resume testing consisted of an external interface using a one Gb Ethernet card, and internal connectivity provided by a VSWITCH.