Lustre discuss - Aug 2010 - lfs --obd discrepancy to lctl dl (1.8.3)

Hello,

lfs prints different obd(idx) compared to lctl dl. We use single striping.


cluster1 tmp # lfs find --obd scia-OST0017_UUID
/data/scia/L0/V0.00/20100327/SCI_NL__0PNPDE20100327_193441_000040582088_00071_42209_1158.N1
/data/scia/L0/V0.00/20100327/SCI_NL__0PNPDE20100327_193441_000040582088_00071_42209_1158.N1

cluster1 tmp # lfs getstripe
/data/scia/L0/V0.00/20100327/SCI_NL__0PNPDE20100327_193441_000040582088_00071_42209_1158.N1
/data/scia/L0/V0.00/20100327/SCI_NL__0PNPDE20100327_193441_000040582088_00071_42209_1158.N1
lmm_stripe_count:   1
lmm_stripe_size:    1048576
lmm_stripe_offset:  23
        obdidx           objid          objid            group
            23           41020         0xa03c                0

cluster1 tmp # lctl dl
<snip>
 19 UP osc scia-OST0010-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 4
 20 UP osc scia-OST0011-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 4
 21 UP osc scia-OST0012-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 4
 22 UP osc scia-OST0013-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 4
 23 UP osc scia-OST0014-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 5
 24 UP osc scia-OST0015-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 5
 25 UP osc scia-OST0016-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 5
 26 UP osc scia-OST0017-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 5
 27 UP osc scia-OST0018-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 5
 28 UP osc scia-OST0019-osc-ffff8800bb076000
c50eddc4-14c3-66a0-0f8d-7bc8e2b9a1e8 5
<snap>

According to "lfs find" the stripe should be on scia-OST0017_UUID.
"lfs gestripe" reports to have it on obdidx 23 , which is scia-OST0014
according to lctl dl.
Which one is true ? As fas as i remember it worked correctly in 1.6.6.


We updated currently from 1.6.6 to 1.8.3. Could have been something broken
during upgrade ?

Thanks and Regards
Heiko

Hi!

On Wed, Aug 11, 2010 at 09:53:01AM +0200, Heiko Schr?ter
wrote:
> According to "lfs find" the stripe should be on
scia-OST0017_UUID. "lfs
> gestripe" reports to have it on obdidx 23 , which is scia-OST0014
according
> to lctl dl.  Which one is true ?
lctl dl returns a list of all Lustre components running on the local machine,
prefixed by a sequential number. It depends on the order in which components
have been started on the machine, and has nothing to do with obdidx. Your
file resides on OST 23 (== 0x17), therefore.

Regards,

Daniel.

On 08/11/2010 01:38 AM, Daniel Kobras wrote:
> On Wed, Aug 11, 2010 at 09:53:01AM +0200, Heiko Schr?ter wrote:
>> According to "lfs find" the stripe should be on
scia-OST0017_UUID. "lfs
>> gestripe" reports to have it on obdidx 23 , which is scia-OST0014
according
>> to lctl dl.  Which one is true ?
>
> lctl dl returns a list of all Lustre components running on the local
machine,
> prefixed by a sequential number. It depends on the order in which
components
> have been started on the machine, and has nothing to do with obdidx. Your
> file resides on OST 23 (== 0x17), therefore.
If you don''t want to do the math (or your indexes somehow
don''t match
your ost names), you can use the "lfs osts" command to get a mapping
of
indices to ost names.

Chris

Am Freitag 13 August 2010, um 03:07:31 schrieb Christopher J. Morrone:

Thanks a lot.
"lfs osts" is the one i''ve been looking for.

and if this one would print out the IP as well ... but i think this is asking
for too much....

Regards
Heiko
> On 08/11/2010 01:38 AM, Daniel Kobras wrote:
> 
> > On Wed, Aug 11, 2010 at 09:53:01AM +0200, Heiko Schr?ter wrote:
> >> According to "lfs find" the stripe should be on
scia-OST0017_UUID. "lfs
> >> gestripe" reports to have it on obdidx 23 , which is
scia-OST0014 according
> >> to lctl dl.  Which one is true ?
> >
> > lctl dl returns a list of all Lustre components running on the local
machine,
> > prefixed by a sequential number. It depends on the order in which
components
> > have been started on the machine, and has nothing to do with obdidx.
Your
> > file resides on OST 23 (== 0x17), therefore.
> 
> If you don''t want to do the math (or your indexes somehow
don''t match
> your ost names), you can use the "lfs osts" command to get a
mapping of
> indices to ost names.
> 
> Chris
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>