Hello Patrick,
Thank you for the quick reply.
No, I have no particular use-case in mind, I'm just playing around with PFL.
If this is currently not properly supported, a quick fix could be to
prevent the user from creating such incomplete layouts?
Regards,
Thomas
On 2/22/19 5:33 PM, Patrick Farrell wrote:
Thomas,
This is expected, but it's also something we'd like to fix - See LU-9341.
Basically, append tries to instantiate the layout from 0 to infinity,
and it fails because your layout is incomplete (ie doesn't go to
infinity).
May I ask why you're creating a file with an incomplete layout? Do
you have a use case in mind?
- Patrick
------------------------------------------------------------------------
*From:* lustre-discuss <[email protected]> on
behalf of LEIBOVICI Thomas <[email protected]>
*Sent:* Friday, February 22, 2019 10:27:48 AM
*To:* [email protected]
*Subject:* [lustre-discuss] EINVAL error when writing to a PFL file
(lustre 2.12.0)
Hello,
Is it expected to get an error when appending a PFL file made of 2
regions [0 - 1M] and [1M to 6M]
even if writing in this range?
I get an error when appending it, even when writting in the very first
bytes:
[root@vm0]# lfs setstripe -E 1M -c 1 -E 6M -c 2 /mnt/lustre/m_fou3
[root@vm0]# lfs getstripe /mnt/lustre/m_fou3
/mnt/lustre/m_fou3
lcm_layout_gen: 2
lcm_mirror_count: 1
lcm_entry_count: 2
lcme_id: 1
lcme_mirror_id: 0
lcme_flags: init
lcme_extent.e_start: 0
lcme_extent.e_end: 1048576
lmm_stripe_count: 1
lmm_stripe_size: 1048576
lmm_pattern: raid0
lmm_layout_gen: 0
lmm_stripe_offset: 3
lmm_objects:
- 0: { l_ost_idx: 3, l_fid: [0x100030000:0x9cf:0x0] }
lcme_id: 2
lcme_mirror_id: 0
lcme_flags: 0
lcme_extent.e_start: 1048576
lcme_extent.e_end: 6291456
lmm_stripe_count: 2
lmm_stripe_size: 1048576
lmm_pattern: raid0
lmm_layout_gen: 0
lmm_stripe_offset: -1
[root@vm0]# stat -c %s /mnt/lustre/m_fou3
14
* append fails:
[root@vm0]# echo qsdkjqslkdjkj >> /mnt/lustre/m_fou3
bash: echo: write error: Invalid argument
# strace indicates that write() gets the error:
write(1, "qsdkjqslkdjkj\n", 14) = -1 EINVAL (Invalid argument)
* no error in case of an open/truncate:
[root@vm0]# echo qsdkjqslkdjkj > /mnt/lustre/m_fou3
OK
Is it expected or should I open a ticket?
Thomas
_______________________________________________
lustre-discuss mailing list
[email protected]
http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
_______________________________________________
lustre-discuss mailing list
[email protected]
http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
