trouble using raidtest on gstripe array
On 6.2 STABLE GENERIC, I have set up RAID0 using gstripe on two SATA
drives and installed benchmarks/raidtest for testing.
The array is known as /dev/stripe/data.
These were my steps:
# export mediasize=`diskinfo /dev/stripe/data | awk '{print $3}'`
# export sectorsize=`diskinfo /dev/stripe/data | awk '{print $2}'`
# raidtest genfile -s $mediasize -S $sectorsize -n 5
# ls
-rw-r--r-- 1 root super 781K Jan 27 08:42 raidtest.data
# raidtest test -d /dev/stripe/data -n 10 raidtest.data
raidtest: Cannot open 'raidtest.data' device: Operation not permitted
# ktrace raidtest test -d /dev/stripe/data -n 10 raidtest.data
# kdump
1222 raidtest CALL open(0xbfbfed3f,0,0x8049e6c)
1222 raidtest NAMI raidtest.data
1222 raidtest RET open 3
1222 raidtest CALL fstat(0x3,0xbfbfeb30)
1222 raidtest RET fstat 0
1222 raidtest CALL open(0xbfbfed28,0x10002,0x8049e6c)
1222 raidtest NAMI /dev/stripe/data
1222 raidtest RET open -1 errno 1 Operation not permitted
1222 raidtest CALL write(0x2,0xbfbde3d0,0xa)
1222 raidtest GIO fd 2 wrote 10 bytes
raidtest:
1222 raidtest RET write 10/0xa
1222 raidtest CALL write(0x2,0xbfbde3f0,0x22)
1222 raidtest GIO fd 2 wrote 34 bytes
Cannot open 'raidtest.data' device
1222 raidtest RET write 34/0x22
1222 raidtest CALL write(0x2,0x2813ed98,0x2)
1222 raidtest GIO fd 2 wrote 2 bytes
:
1222 raidtest RET write 2
1222 raidtest CALL write(0x2,0xbfbde3d0,0x18)
1222 raidtest GIO fd 2 wrote 24 bytes
Operation not permitted
1222 raidtest RET write 24/0x18
1222 raidtest CALL exit(0x1)
---
Looks like the gstripe label (/dev/stripe/data) is not available
somehow. Is there any known workaround?
---
Port info:
This utility can be used to test performance of storage devices.
First, one need to generate file with I/O operations:
# set mediasize=`diskinfo /dev/device | awk '{print $3}'`
# set sectorsize=`diskinfo /dev/device | awk '{print $2}'`
# raidtest genfile -s $mediasize -S $sectorsize -n 5
It will generate test which contains 5 I/O requests with random
size and random offset. Size is a multiple of sectorsize, but less than
or
equal to 128kB (maxium size of I/O request). I/O request type (READ or
WRITE)
is random as well.
All test data are stored in 'raidtest.data' file in current working
directory.
To run test, one should type:
# raidtest test -d /dev/device -n 10
This command will read test data from 'raidtest.data' file, run 10
processes
which will be used to send requests to the given device in parallel.
When test is finished you will see statistics:
Bytes per second: x
Requests per second: y
If you compare performance of two storage devices, use the same data
file!
usage: raidtest genfile [-frw] -s mediasize [-S sectorsize] -n
nrequests [file]
raidtest test [-Rrw] -d device [-n processes] [file]
where:
-d device path to tested device
-f if raidtest.data file or specified file already
exists,
remove it and create new one
-n nrequests number of requests to generate
-n processes number of processes to run
-r generate/run only READ requests
-R generate random data for write requests
-s size of destination device
-S sector size of destination device
-w generate/run only WRITE requests
file path to the data file instead of
default 'raidtest.data'
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trouble using raidtest on gstripe array
On 6.2 STABLE GENERIC, I have set up RAID0 using gstripe on two SATA
drives and installed benchmarks/raidtest for testing.
The array is known as /dev/stripe/data.
These were my steps:
# export mediasize=`diskinfo /dev/stripe/data | awk '{print $3}'`
# export sectorsize=`diskinfo /dev/stripe/data | awk '{print $2}'`
# raidtest genfile -s $mediasize -S $sectorsize -n 5
# ls
-rw-r--r-- 1 root super 781K Jan 27 08:42 raidtest.data
# raidtest test -d /dev/stripe/data -n 10 raidtest.data
raidtest: Cannot open 'raidtest.data' device: Operation not permitted
# ktrace raidtest test -d /dev/stripe/data -n 10 raidtest.data
# kdump
1222 raidtest CALL open(0xbfbfed3f,0,0x8049e6c)
1222 raidtest NAMI raidtest.data
1222 raidtest RET open 3
1222 raidtest CALL fstat(0x3,0xbfbfeb30)
1222 raidtest RET fstat 0
1222 raidtest CALL open(0xbfbfed28,0x10002,0x8049e6c)
1222 raidtest NAMI /dev/stripe/data
1222 raidtest RET open -1 errno 1 Operation not permitted
1222 raidtest CALL write(0x2,0xbfbde3d0,0xa)
1222 raidtest GIO fd 2 wrote 10 bytes
raidtest:
1222 raidtest RET write 10/0xa
1222 raidtest CALL write(0x2,0xbfbde3f0,0x22)
1222 raidtest GIO fd 2 wrote 34 bytes
Cannot open 'raidtest.data' device
1222 raidtest RET write 34/0x22
1222 raidtest CALL write(0x2,0x2813ed98,0x2)
1222 raidtest GIO fd 2 wrote 2 bytes
:
1222 raidtest RET write 2
1222 raidtest CALL write(0x2,0xbfbde3d0,0x18)
1222 raidtest GIO fd 2 wrote 24 bytes
Operation not permitted
1222 raidtest RET write 24/0x18
1222 raidtest CALL exit(0x1)
---
Looks like the gstripe label (/dev/stripe/data) is not available
somehow. Is there any known workaround?
---
Port info:
This utility can be used to test performance of storage devices.
First, one need to generate file with I/O operations:
# set mediasize=`diskinfo /dev/device | awk '{print $3}'`
# set sectorsize=`diskinfo /dev/device | awk '{print $2}'`
# raidtest genfile -s $mediasize -S $sectorsize -n 5
It will generate test which contains 5 I/O requests with random
size and random offset. Size is a multiple of sectorsize, but less than
or
equal to 128kB (maxium size of I/O request). I/O request type (READ or
WRITE)
is random as well.
All test data are stored in 'raidtest.data' file in current working
directory.
To run test, one should type:
# raidtest test -d /dev/device -n 10
This command will read test data from 'raidtest.data' file, run 10
processes
which will be used to send requests to the given device in parallel.
When test is finished you will see statistics:
Bytes per second: x
Requests per second: y
If you compare performance of two storage devices, use the same data
file!
usage: raidtest genfile [-frw] -s mediasize [-S sectorsize] -n
nrequests [file]
raidtest test [-Rrw] -d device [-n processes] [file]
where:
-d device path to tested device
-f if raidtest.data file or specified file already
exists,
remove it and create new one
-n nrequestsnumber of requests to generate
-n processesnumber of processes to run
-r generate/run only READ requests
-R generate random data for write requests
-s size of destination device
-S sector size of destination device
-w generate/run only WRITE requests
filepath to the data file instead of
default 'raidtest.data'
___
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To unsubscribe, send any mail to [EMAIL PROTECTED]
