Seagate ST318404LC Podręcznik Użytkownika Pobierz pdf (Strona 46)

Dell Compellent Confidential HP-UX Best Practices 11i v2 and 11i v1

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Tuning for Performance

In order to achieve optimized I/O with any OS platform, the proper tuning/configuration of various

kernel, SCSI, network and filesystem parameters may be required; the process of tuning in itself is not

a science but an art of understanding the performance and various I/O requirements of the respective

environment and application ecosystem that you manage. Though the following information is shared

as best practice for HP-UX with the Dell Compellent Storage Center products, it is neither a complete

nor thorough representation of all possible tuning scenarios within any managed HP-UX environment.

Consult with your respective vendor and software support engineers for your environment-centric

tuning needs and for further assistance.

Kernel Tuning

Issue the following command against each the kernel, thereby increasing the SCSI Max Queue Depth to

32.

Type: kctune -vs scsi_max_qdepth=32

SCSI Configuration

Issue the following command against each Dell Compellent Storage Center-presented LUN, increasing

its queue depth to 32.

Type: scsictl –m queue_depth=32 /dev/rdsk/c27t0d0

Filesystem Configuration

When creating a new filesystem on a Logical Volume, apply an 8k block size as part of the filesystem

build options.

Type: newfs –F vxfs –o largefiles –b 8192 /dev/vg<XX>/rlvol<name>

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Seagate ST318404LC Podręcznik Użytkownika Strona 46