linuxsambaperf - Nin Lei Duane Mauler J B Mills John Mullin...

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© Copyright IBM Corp. 2005. All rights reserved. ibm.com /redbooks 1 Red books Paper Chapter 1. Linux on zSeries: Samba-3 Performance Observations This Redpaper was developed to provide readers with basic performance guidelines for Samba Version 3.0.5 on zSeries® Linux® and to give background information that can be used in configuring and tuning the Samba V3 environment. The data collected was developed using an IBM internal workload generator to simulate a heavy transaction load. The paper identifies parameters for optimum performance of Samba V3. Nin Lei Duane Mauler J B Mills John Mullin Gene Ong Judy Viccica
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2 Linux on zSeries: Samba-3 Performance Observations The system configuration The test system was a zSeries 990 configuration with a FICON®-attached Enterprise Storage System (ESS 800). Table 1 summarizes the system configuration. Table 1 Summary of the system configuration The network interface An Ethernet network was used to connect the zSeries Samba V3 server to the Client xSeries® x335 workstations that executed the test application. Table 2 summarizes the network interface. Table 2 Summary of the network interface The hardware configuration Figure 1 shows the hardware environment for the testing when one OSA card was enabled. Server model CPCs and CPUs Mode Storage System zSeries 2084 (z990) 1 LPAR up to 4 CPs Native 1 GB Main Memory per LPAR ESS 800 24 3390 Mod 9 Volumes SuSE Linux SLES 8 SP3 2.4.21-241 Kernel Samba V3 Transport Type NIC Code level Switch TCP/IP Ethernet OSA Express Gigabit Ethernet MTU=1500 QDIO base support level Rev 1.145.4.5 Rev 1.66.4.3 level 0615 QETH Rev 1.337.4.22 Rev 1.113.4.8 Cisco 6509
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Chapter 1. Linux on zSeries: Samba-3 Performance Observations 3 Figure 1 Single OSA interface card configuration Figure 2 on page 4 shows the hardware environment when multiple OSA interface cards were enabled. Cisco 6509 Network switch zSeries 990 IBM Enterprise Storage Server (ESS) X335 2cpu 2.8GHz Xeon FICON connection Gigabit Ethernet Connection Gigabit Ethernet Connection Native LPAR with SuSE SLES 8 Server Test Client Workload simulator RedHat 9 Linux Gigabit OSA Card Windows 2000 Domain Controller Mod 9 drives With eight paths
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4 Linux on zSeries: Samba-3 Performance Observations Figure 2 Multiple OSA interface cards configuration Configuration, setup, preliminary tests, and the challenges In the following sections we describe the configuration, workload driver, Samba configuration parameters, and tests that we performed. System configuration The test environment was a native LPAR on a zSeries 990 system. SUSE SLES 8 31-bit Linux distribution with Service Pack 3 was installed in the LPAR to provide the execution platform. Samba Version 2.2.8, the default version packaged with SUSE SLES 8, was used to run a number of tests to serve as a baseline measurement against Version 3.0.5. Then Samba Version 3.0.5 was manually downloaded, compiled and configured. The majority of measurements taken were on Samba Version 3.0.5.
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linuxsambaperf - Nin Lei Duane Mauler J B Mills John Mullin...

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