[Lustre-discuss] Find all files on a specific OST

[Anselm Strauss]

On 30.01.2008, at 02:09, Cliff White wrote:

> Anselm Strauss wrote:
>> Hi,
>> I want to know all files that are located on a specific OST, but   
>> neither 'lfs find ...' nor 'lfs getstripe ...' can give me an  
>> answer.  I do not use striping. This is what I tried:
>> gnode30 ~ # lfs df -h
>> UUID                     bytes      Used Available  Use% Mounted on
>> scratch-MDT0000_UUID    710.0G     41.0G    668.9G    5% /mnt/  
>> lustre[MDT:0]
>> scratch-OST0001_UUID      6.3T    327.3G      5.9T    5% /mnt/  
>> lustre[OST:1]
>> scratch-OST0002_UUID      6.3T    327.3G      5.9T    5% /mnt/  
>> lustre[OST:2]
>> scratch-OST0003_UUID      6.3T    328.3G      5.9T    5% /mnt/  
>> lustre[OST:3]
>> scratch-OST0004_UUID      6.3T    327.3G      5.9T    5% /mnt/  
>> lustre[OST:4]
>> scratch-OST0006_UUID      6.3T    327.3G      5.9T    5% /mnt/  
>> lustre[OST:6]
>> scratch-OST0007_UUID      6.3T    326.3G      5.9T    5% /mnt/  
>> lustre[OST:7]
>> filesystem summary:      37.6T      1.9T     35.7T    5% /mnt/lustre
>> gnode30 ~ # lctl dl
>>   0 UP mgc MGC10.1.140.1 at tcp 5c3be07b-fab6-390e-0fe6-044a5dd0b5c9 5
>>   1 UP lov scratch-clilov-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 4
>>   2 UP mdc scratch-MDT0000-mdc-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 5
>>   3 UP osc scratch-OST0001-osc-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 5
>>   4 UP osc scratch-OST0002-osc-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 5
>>   5 UP osc scratch-OST0003-osc-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 5
>>   6 UP osc scratch-OST0004-osc-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 5
>>   7 UP osc scratch-OST0006-osc-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 5
>>   8 UP osc scratch-OST0007-osc-ffff8100de423000 9ad18aa7-  
>> e0e4-9766-0f26-9cabac1f9a28 5
>> gnode30 ~ # cd /mnt/lustre/
>> gnode30 lustre # ls -lh
>> total 5.9G
>> -rw-r--r-- 1 root root 1000M Jan 29 19:41 zero1
>> -rw-r--r-- 1 root root 1000M Jan 29 19:41 zero2
>> -rw-r--r-- 1 root root 1000M Jan 29 19:41 zero3
>> -rw-r--r-- 1 root root 1000M Jan 29 19:41 zero4
>> -rw-r--r-- 1 root root 1000M Jan 29 19:41 zero5
>> -rw-r--r-- 1 root root 1000M Jan 29 19:42 zero6
>> gnode30 lustre # lfs find -O scratch-OST0003_UUID /mnt/lustre
>> gnode30 lustre # lfs find -O 7 /mnt/lustre
>> gnode30 lustre # lfs getstripe -O scratch-OST0003_UUID /mnt/lustre
>> error: setup_obd_uuid: unknown obduuid: scratch-OST0003_UUID
>> /mnt/lustre/zero1
>> /mnt/lustre/zero2
>> /mnt/lustre/zero3
>> /mnt/lustre/zero4
>> /mnt/lustre/zero5
>> /mnt/lustre/zero6
>> gnode30 lustre #
>> Am I missing the right syntax? Is this only possible if I use   
>> striping? Do I use the wrong UUID, how to determine the right UUID?
>
> Use the fourth field in 'lctl dl'
> lfs getstripe -r --obd scratch-OST0003-osc-ffff8100de423000 /mnt/ 
> lustre
>
> should work.

This didn't help either, the UUID is still unknown:

gnode30 ~ # lfs getstripe -r --obd scratch-OST0003-osc- 
ffff8100de423000 /mnt/lustre
error: setup_obd_uuid: unknown obduuid: scratch-OST0003-osc- 
ffff8100de423000
/mnt/lustre
default stripe_count: 6 stripe_size: 0 stripe_offset: 1
/mnt/lustre/zero2
/mnt/lustre/zero
gnode30 ~ #

> cliffw
>
>> Thanks,
>> Anselm Strauss

Thanks for your help,
Anselm Strauss