Details
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Bug
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Resolution: Duplicate
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Major
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None
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None
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None
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3
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9223372036854775807
Description
A customer application benchmark required for acceptance testing shows terrible i/o performance. A simple test case was created to mimic the customer application behavior. This test never completes when run with a walltime limit of 30 minutes (job is killed after walltime exceeded); the same test run to the /tmp fs on the client node completes within a few seconds.
The tests completes in few seconds in Lustre-2.1.
program iotest PARAMETER (NA=6400) dimension IA(NA) call init (IA,NA) call sleep(1) open (unit=22, file='time.step') do i=1,na call my_write(iA,NA,i) end do STOP END SUBROUTINE my_write(IA,NA,I) dimension ia(na) kt=ia(i) WRITE ( 22, '(1x, i8)' ) kt REWIND (22) return end subroutine init(IA,NA) dimension iA(na) do i=1,NA ia(i)=i end do return end
Attachments
Issue Links
- duplicates
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LU-10048 osd-ldiskfs to truncate outside of main transaction
- Resolved