Linux Kernel Performance

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Introduction

• Most of today's computer systems need to process large amount of data. The data are stored in internal or external hard disks. It is critical for the computer servers be able to move large amount of data as fast as possible. Therefore, the performance of the I/O channel, including both software and hardware, is very important to the overall system performance. Disk I/O performance test is focusing on the raw and  Direct IO with read and readv features. The test provides an indicator of disk I/O performance. This is the typical I/O environment used by database management systems like Oracle and DB2 in the telco industries.

Results

 5/03/2002,      Data Center
 5/02/2002,      Scalabilitybld1
 5/01/2002,      ols charts
 4/23/2002,      ols results
 4/11/2002,      Carrier Grade
 4/10/2002,      Disk I/O Performance

Test Environment

• Hardware :    xSeries 8-way pIII @ 700 MHz with 1 MB L2; 4 GB RAM w/ kernel built 4 GB support; 4 IBM ServerRAID 4H controllers; 8 trays of 10 SCSI disks with 2 trays attached to each controller; 32 logical disks with  2 physical SCSI disks attached to each logical disk; 9.1 GB SCSI disk.      

• Software :      Red Hat 7.1;   2.4.6 and 2.4.17 kernels.

Resources

• Project team
• Process
• Run rules
• Test scripts
• External postings
• Relevant links