[Lustre-discuss] lfs find bug

Colin Faber cfaber at gmail.com
Mon Jun 13 09:54:57 PDT 2011


What version of lustre are you running. I seem to recall a bug back in 
the early 1.8 releases relating to how lfs find walks through the OST 
index and if one was missing there were issues.

-cf


On 06/13/2011 09:44 AM, Michael Barnes wrote:
> List,
>
> lfs find is not finding all OSTs on our system.  This may be due to a bug we
> triggered by having deactivated OSTs.  OST9-28 don't exist, and lustre find
> cannot find OST29, which is the first OST after a sequence of missing ones.
>
> Example:
>
> $ lfs getstripe .
> OBDS:
> 0: lustre-OST0000_UUID ACTIVE
> 1: lustre-OST0001_UUID ACTIVE
> 2: lustre-OST0002_UUID ACTIVE
> 3: lustre-OST0003_UUID ACTIVE
> 4: lustre-OST0004_UUID ACTIVE
> 5: lustre-OST0005_UUID ACTIVE
> 6: lustre-OST0006_UUID ACTIVE
> 7: lustre-OST0007_UUID ACTIVE
> 8: lustre-OST0008_UUID ACTIVE
> 41: lustre-OST0029_UUID ACTIVE
> 42: lustre-OST002a_UUID ACTIVE
> 43: lustre-OST002b_UUID ACTIVE
> 44: lustre-OST002c_UUID ACTIVE
> 45: lustre-OST002d_UUID ACTIVE
> 46: lustre-OST002e_UUID ACTIVE
> 47: lustre-OST002f_UUID ACTIVE
> 48: lustre-OST0030_UUID ACTIVE
> 49: lustre-OST0031_UUID ACTIVE
> 50: lustre-OST0032_UUID ACTIVE
> 51: lustre-OST0033_UUID ACTIVE
> 52: lustre-OST0034_UUID ACTIVE
> 53: lustre-OST0035_UUID ACTIVE
> 54: lustre-OST0036_UUID ACTIVE
> 55: lustre-OST0037_UUID ACTIVE
> 56: lustre-OST0038_UUID ACTIVE
> 57: lustre-OST0039_UUID ACTIVE
> 58: lustre-OST003a_UUID ACTIVE
> 59: lustre-OST003b_UUID ACTIVE
> 60: lustre-OST003c_UUID ACTIVE
> 61: lustre-OST003d_UUID ACTIVE
> 62: lustre-OST003e_UUID ACTIVE
> 63: lustre-OST003f_UUID ACTIVE
> 64: lustre-OST0040_UUID ACTIVE
> 65: lustre-OST0041_UUID ACTIVE
> 66: lustre-OST0042_UUID ACTIVE
> 67: lustre-OST0043_UUID ACTIVE
> 68: lustre-OST0044_UUID ACTIVE
> .
> (Default) stripe_count: 1 stripe_size: 1048576 stripe_offset: -1
> ./loss12.out
> 	obdidx		 objid		objid		 group
> 	    42	       6678168	     0x65e698	             0
>
> ./lustre-OST0029
> 	obdidx		 objid		objid		 group
> 	    41	       6953217	     0x6a1901	             0
>
> ./lustre-OST002a
> 	obdidx		 objid		objid		 group
> 	    42	       6841347	     0x686403	             0
>
>
> $ lfs find -O lustre-OST002a_UUID .
> ./loss12.out
> ./lustre-OST002a
>
> $ lfs find -O lustre-OST0029_UUID .
> <NOTHING>
>
> -mb
>
> --
> +-----------------------------------------------
> | Michael Barnes
> |
> | Thomas Jefferson National Accelerator Facility
> | Scientific Computing Group
> | 12000 Jefferson Ave.
> | Newport News, VA 23606
> | (757) 269-7634
> +-----------------------------------------------
>
>
>
>
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