NSS - DIRECT IO Support - Query

Team,
I am new to Novell OES usage.
My configuration: SLES 11 SP2 + OES 11 SP1
I created NSS Pools & volumes:
bl480g-196-167:~ # df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/cciss/c0d0p2 68455984 4761396 62651368 8% /
udev 4029532 516 4029016 1% /dev
tmpfs 4029532 264 4029268 1% /dev/shm
admin 4096 0 4096 0% /_admin
/dev/pool/POOL_167 83843072 3492432 80350640 5% /opt/novell/nss/mnt/.pools/POOL_167
167_VOL1 83843072 820776 80350640 2% /media/nss/167_VOL1
167_VOL2 83843072 818140 80350640 2% /media/nss/167_VOL2
167_VOL3 83843072 776684 80350640 1% /media/nss/167_VOL3
167_VOL4 83843072 812016 80350640 2% /media/nss/167_VOL4
Issue: Now i attempt to run dt tool (Direct IO option) as test run. The test fails & dt fails to write.
without direct io flag, dt tool run is working.
I read Novell Support Doc ID: 7001517 & understand there's an option to enable/disable Direct IO to file/volume.
Question: Can you suggest how can i toggle DIO & non DIO? Procedure please.
arun

Originally Posted by ab
Can you show the actual command you're using, as well as how you are
configuring Direct I/O exactly? From which package does 'dt' originate (I
cannot find it on my system)?
Good luck.
Hello
-> flags=direct option in the below syntax does direct io to file system.
bl460g8-196-164:~ # /x/eng/localtest/arch/x86_64-redhat-rhel5/bin/dt.stable of=/media/nss/164_VOL2/bl460g8-196-164/nate_test limit=600m oncerr=abort disable=pstats notime=fsync,close oflags=trunc errors=1 procs=3 incr=var min=2k max=256k dispose=keep pattern=iot prefix='%d@%h' iotype=random keepalivet=300 keepalive="300SecKeepAliveMsg##%h@%d##PassCount:%p ##IOMode:%i##TotalTestTime:%T##PassTestTime:%t##Bl ocksTransferred:%l##RecordsRead:%r##RecordsWritten :%w##KBsPerSecond:%kbps##IOsPerSecond:%iops" enable=noprog noprogt=120s noprogtt=600s alarm=3s trigger="cmd:/x/eng/localtest/noarch/bin/dt_noprog_script.ksh" history=3 enable=syslog history=3 enable=syslog hdsize=128 stopon=/tmp/1378279342.dt flags=direct runtime=2592000
dt.stable (5356): No history entries to report!
dt.stable (5356): ERROR: 'open -> /media/nss/164_VOL2/bl460g8-196-164/nate_test-5356', errno = 22 - Invalid argument
dt.stable (5357): No history entries to report!
dt.stable (5357): ERROR: 'open -> /media/nss/164_VOL2/bl460g8-196-164/nate_test-5357', errno = 22 - Invalid argument
dt.stable (5358): No history entries to report!
dt.stable (5357): Error number 1 occured on Wed Sep 4 17:28:40 2013
dt.stable (5357): Executing: /x/eng/localtest/noarch/bin/dt_noprog_script.ksh /media/nss/164_VOL2/bl460g8-196-164/nate_test-5357 open 512 0 0 0 22 0
dt.stable (5356): Error number 1 occured on Wed Sep 4 17:28:40 2013
dt.stable (5356): Executing: /x/eng/localtest/noarch/bin/dt_noprog_script.ksh /media/nss/164_VOL2/bl460g8-196-164/nate_test-5356 open 512 0 0 0 22 0
dt.stable (5358): ERROR: 'open -> /media/nss/164_VOL2/bl460g8-196-164/nate_test-5358', errno = 22 - Invalid argument
dt.stable (5358): Error number 1 occured on Wed Sep 4 17:28:40 2013
dt.stable (5358): Executing: /x/eng/localtest/noarch/bin/dt_noprog_script.ksh /media/nss/164_VOL2/bl460g8-196-164/nate_test-5358 open 512 0 0 0 22 0
dt trigger scripting being called - /x/eng/localtest/noarch/bin/dt_noprog_script.ksh
dt trigger scripting being called - /x/eng/localtest/noarch/bin/dt_noprog_script.ksh
The device name is /media/nss/164_VOL2/bl460g8-196-164/nate_test-5357
The operation is open
The device name is /media/nss/164_VOL2/bl460g8-196-164/nate_test-5356
The operation is open
The device block size is 512
The device block size is 512
The offset, position and lba are 0, 0, 0
The offset, position and lba are 0, 0, 0
The errno is 22
The errno is 22
The no progress time is 0
The no progress time is 0
TimeStamp: Wednesday 04Sep2013 05:28:40 PM
dt trigger scripting being called - /x/eng/localtest/noarch/bin/dt_noprog_script.ksh
The device name is /media/nss/164_VOL2/bl460g8-196-164/nate_test-5358
/x/eng/localtest/noarch/bin/dt_noprog_script.ksh: An error 22 has occurred
The operation is open
The device block size is 512
The offset, position and lba are 0, 0, 0
The errno is 22
The no progress time is 0
/x/eng/localtest/noarch/bin/dt_noprog_script.ksh: No additional user supplied script was specified
TimeStamp: Wednesday 04Sep2013 05:28:40 PM
/x/eng/localtest/noarch/bin/dt_noprog_script.ksh: An error 22 has occurred
/x/eng/localtest/noarch/bin/dt_noprog_script.ksh: No additional user supplied script was specified
The return code that /x/eng/localtest/noarch/bin/dt_noprog_script.ksh is sending to dt is 1
dt.stable (5356): Trigger exited with status 1!
The return code that /x/eng/localtest/noarch/bin/dt_noprog_script.ksh is sending to dt is 1
Total Statistics (5357):
Output device/file name: /media/nss/164_VOL2/bl460g8-196-164/nate_test-5357 (device type=regular)
Mounted from device: 164_VOL2
Mounted on directory: /media/nss/164_VOL2
Filesystem type: nssvol
Filesystem options: rw,name=164_VOL2
Type of I/O's performed: random (rseed=0)
Random I/O Parameters: position=0, ralign=512, rlimit=0
Current Process Reported: 2/3
Data pattern string used: 'IOT Pattern' (blocking is 512 bytes)
IOT seed value used: 0x00000000
Total records processed: 0 with min=2048, max=262144, incr=variable
Total bytes transferred: 0 (0.000 Kbytes, 0.000 Mbytes)
Average transfer rates: 0 bytes/sec, 0.000 Kbytes/sec
Number I/O's per second: 0.000
Number seconds per I/O: 0.0000 (0.00ms)
Total passes completed: 0
Total errors detected: 1/1
Total elapsed time: 4773h16m30.11s
Total system time: 00m00.00s
Total user time: 00m00.00s
Total Statistics (5358):
Output device/file name: /media/nss/164_VOL2/bl460g8-196-164/nate_test-5358 (device type=regular)
Mounted from device: 164_VOL2
Mounted on directory: /media/nss/164_VOL2
Filesystem type: nssvol
Filesystem options: rw,name=164_VOL2
Type of I/O's performed: random (rseed=0)
Random I/O Parameters: position=0, ralign=512, rlimit=0
Current Process Reported: 3/3
Data pattern string used: 'IOT Pattern' (blocking is 512 bytes)
IOT seed value used: 0x00000000
Total records processed: 0 with min=2048, max=262144, incr=variable
Total bytes transferred: 0 (0.000 Kbytes, 0.000 Mbytes)
Average transfer rates: 0 bytes/sec, 0.000 Kbytes/sec
Number I/O's per second: 0.000
Number seconds per I/O: 0.0000 (0.00ms)
Total passes completed: 0
Total errors detected: 1/1
Total elapsed time: 4773h16m30.11s
Total system time: 00m00.00s
Total user time: 00m00.00s
Starting time: Wed Sep 4 17:28:40 2013
Starting time: Wed Sep 4 17:28:40 2013
Ending time: Wed Sep 4 17:28:40 2013
Ending time: Wed Sep 4 17:28:40 2013
bl460g8-196-164:~ # df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/cciss/c0d0p2 68464176 9031496 58389340 14% /
udev 4029532 520 4029012 1% /dev
tmpfs 4029532 180 4029352 1% /dev/shm
admin 4096 0 4096 0% /_admin
/dev/pool/POOL_164 83843072 1335580 82507492 2% /opt/novell/nss/mnt/.pools/POOL_164
164_VOL1 83843072 540620 82507492 1% /media/nss/164_VOL1
164_VOL2 83843072 564 82507492 1% /media/nss/164_VOL2
164_VOL3 83843072 544824 82507492 1% /media/nss/164_VOL3
164_VOL4 83843072 556 82507492 1% /media/nss/164_VOL4
btcinf02.eng.btc.in:/vol/localtest 419430400 272625088 146805312 65% /x/eng/localtest
bl460g8-196-164:~ #
arun

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