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Tuning hints & tips

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The following is a collection of observations/recommendations from the Linux Performance Team for Linux on System z. These numbers are not intended for comparison with similar products on other platforms.


Disk I/O
DASD block size
ECKD and SCSI on DS8000
Fixed I/O buffers
Linux kernel 2.6 - I/O scheduler
Multipathing with SCSI disks
Volume management with LVM
Java
Journaling file systems
Memory bandwidth
Networking
Scalability of Linux kernel 2.4 and kernel 2.6
Security appliances
Cryptographic support
Resource management & analysis
FCP statistics (SLES9 / SLES10)
Web applications
Apache webserver

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Team
Please address any comments to the performance team: linux390@de.ibm.com