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Full Discussion: "find" on different OS's
Top Forums UNIX for Advanced & Expert Users "find" on different OS's Post 302480522 by citaylor on Wednesday 15th of December 2010 08:00:40 AM
Old 12-15-2010
I respectfully think the statement:
Quote:
Originally Posted by methyl
The performance of the "find" program itself is pretty consistent across various editions of unix.
Is a little misleading and needs some qualification.
Although the find program generally works in a similar way across most UNIX/Linux variants, the performance of it is wildly different depending upon lots of factors (filesystem type/performance, filesystem tuning, hardware, O/S tuning etc). Solaris for example is notoriously slow on its UFS performance.
I will qualify this qualification with some statistics:
My solaris 8 box running IDE drives is currently doing around 4940 files per second on a given find.
My solaris 10 box running striped SCSI U320 drives is currently doing around 4854 files per second.
My AIX 5.3 43p-170 box with U160 drives on JFS is getting 4766 files per second.
My HP-UX 11.11 C3600 with U160 drives on VXFS is getting 5220 files per second.
My HP-UX 11.23 Integrity box with U320 drives on VFXS 8461 files per second.
My OpenSuSE 11.2 Lenovo W500 laptop running a SATA II drive @ 7200RPM on an EXT4 filesystem is getting 13736.
As you can see - wildly different results on wildly different platforms, with my laptop being the fastest!
This is why performance tuning and benchmarking can be one of the most complex areas of computing, due to the multitude of factors involved.

I hope this helps....
 

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TAPEINFO(1)						      General Commands Manual						       TAPEINFO(1)

NAME
tapeinfo - report SCSI tape device info SYNOPSIS
tapeinfo -f <scsi-generic-device> DESCRIPTION
The tapeinfo command reads various information from SCSI tape drives that is not generally available via most vendors' tape drivers. It issues raw commands directly to the tape drive, using either the operating system's SCSI generic device ( e.g. /dev/sg0 on Linux, /dev/pass0 on FreeBSD) or the raw SCSI I/O ioctl on a tape device on some operating systems. One good time to use 'tapeinfo' is immediately after a tape i/o operation has failed. On tape drives that support HP's 'tapealert' API, 'tapeinfo' will report a more exact description of what went wrong. Do be aware that 'tapeinfo' is not a substitute for your operating system's own 'mt' or similar tape driver control program. It is intended to supplement, not replace, programs like 'mt' that access your operating system's tape driver in order to report or set information. OPTIONS
The first argument, given following -f , is the SCSI generic device corresponding to your tape drive. Consult your operating system's doc- umentation for more information (for example, under Linux these are generally start at /dev/sg0 under FreeBSD these start at /dev/pass0). Under FreeBSD, 'camcontrol devlist' will tell you what SCSI devices you have, along with which 'pass' device controls them. Under Linux, "cat /proc/scsi/scsi" will tell you what SCSI devices you have. BUGS AND LIMITATIONS
This program has only been tested on Linux with a limited number of tape drives (HP DDS4, Seagate AIT). AVAILABILITY
tapeinfo is currently being maintained by Eric Lee Green <eric@badtux.org> formerly of Enhanced Software Technologies Inc. The 'mtx' home page is http://mtx.sourceforge.net and the actual code is currently available there and via CVS from http://sourceforge.net/projects/mtx/ . SEE ALSO
mt(1),mtx(1),scsitape(1) TAPEINFO1.0 TAPEINFO(1)
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