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

[Cliff White]

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.


cliffw

> 
> Thanks,
> Anselm Strauss
> 
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