Hi Mark,
I just verified the following commands on my 2.11 system. It works.
[root@centos7-3 tests]# ../utils/lfs setstripe -N2 /mnt/lustre/dir
[root@centos7-3 tests]# touch /mnt/lustre/dir/file
[root@centos7-3 tests]# ../utils/lfs getstripe /mnt/lustre/dir/file
/mnt/lustre/dir/file
lcm_layout_gen: 2
lcm_mirror_count: 2
lcm_entry_count: 2
lcme_id: 65537
lcme_mirror_id: 1
lcme_flags: init
lcme_extent.e_start: 0
lcme_extent.e_end: EOF
lmm_stripe_count: 1
lmm_stripe_size: 1048576
lmm_pattern: raid0
lmm_layout_gen: 0
lmm_stripe_offset: 1
lmm_objects:
- 0: { l_ost_idx: 1, l_fid: [0x100010000:0x6:0x0] }
lcme_id: 131074
lcme_mirror_id: 2
lcme_flags: init
lcme_extent.e_start: 0
lcme_extent.e_end: EOF
lmm_stripe_count: 1
lmm_stripe_size: 1048576
lmm_pattern: raid0
lmm_layout_gen: 0
lmm_stripe_offset: 0
lmm_objects:
- 0: { l_ost_idx: 0, l_fid: [0x100000000:0x6:0x0] }
B.R.,
Emoly
From: Andreas Dilger <[email protected]>
Date: Monday, June 25, 2018 at 3:59 PM
To: Emoly Liu <[email protected]>
Subject: Fwd: [lustre-discuss] Lustre 2.11 File Level Replication
Begin forwarded message:
From: Patrick Farrell <[email protected]<mailto:[email protected]>>
Date: June 22, 2018 at 21:54:26 GMT+2
To: Mark Roper <[email protected]<mailto:[email protected]>>
Cc: "[email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]>>
Subject: Re: [lustre-discuss] Lustre 2.11 File Level Replication
Mark,
Hmm.
I’m adding the list back on here, because that *seems* like it’s wrong. Don’t
have time to check right now, but I’m curious if others can weigh in.
* Patrick
From: Mark Roper <[email protected]<mailto:[email protected]>>
Date: Friday, June 22, 2018 at 2:29 PM
To: Patrick Farrell <[email protected]<mailto:[email protected]>>
Subject: Re: [lustre-discuss] Lustre 2.11 File Level Replication
Thanks Patrick! It looks like you can't set default mirroring with setstripe.
I appreciate the lead and the response!
On Thu, Jun 21, 2018 at 10:09 AM Patrick Farrell
<[email protected]<mailto:[email protected]>> wrote:
Mark,
I haven’t played specifically with FLR and inheritance/templates, but if you
want to set a default layout on a directory, you’ll want to look at lfs
setstripe. Mirror extend is specifically for modifying individual, existing
files.
- Patrick
________________________________
From: lustre-discuss
<[email protected]<mailto:[email protected]>>
on behalf of Mark Roper <[email protected]<mailto:[email protected]>>
Sent: Thursday, June 21, 2018 8:36:43 AM
To: [email protected]<mailto:[email protected]>
Subject: [lustre-discuss] Lustre 2.11 File Level Replication
Hi Lustre Users,
I have set up a Lustre 2.11 cluster with multiple OSS's in order to experiment
with the File Level Replication feature in Lustre 2.11, which I'm excited about
since it raises the bar on availability for cloud deployment of Lustre. I
cannot seem to get files created within a directory to inherit the mirror
settings from the parent directory, which I thought might be possible given the
documentation at
http://wiki.lustre.org/File_Level_Replication_High_Level_Design :
'lfs mirror extend [--no-verify] <-N[mirror_count]> [other setstripe options|-f
<victim_file>] <file_name>
This command will append a replica indicated by setstripe options or just take
the layout from existing file victim_file into the file file_name. The
file_name must be an existing file but it can be a mirrored or normal file.
This command will create new volatile file with any optional setstripe options
that are specified, or using the defaults inherited from the parent directory
or filesystem.'
I was hoping to be able to make all files written to particular directories or
within a filesystem inherit a mirror count transparently to the client writing
or reading files. Does anyone know if this is possible?
Cheers!
Mark Roper
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