I see that Andreas opened LU-11099 for that issue with `lfs setstripe -N` usage. Thank you, Andreas. For completeness, I opened LUDOC-408 to track the corresponding improvement to the Lustre Ops Manual.
-Cory -- From: lustre-discuss <[email protected]> on behalf of Andreas Dilger <[email protected]> Date: Monday, June 25, 2018 at 10:08 AM To: Mark Roper <[email protected]> Cc: "[email protected]" <[email protected]> Subject: Re: [lustre-discuss] Lustre 2.11 File Level Replication It looks like the "-N" option is not documented for "lfs setstripe", only for "lfs mirror create". These two commands use the same code in the background, so it makes sense to also document "-N" for setstripe, since this is the command commonly used to set default file layouts on directories. Cheers, Andreas On Jun 25, 2018, at 12:46, Mark Roper <[email protected]<mailto:[email protected]>> wrote: Thank you Emoly, This is a really useful feature! I must have been reading old setstripe doc last week - I appreciate the email! Mark On Mon, Jun 25, 2018 at 4:09 AM Emoly Liu <[email protected]<mailto:[email protected]>> wrote: 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]<mailto:[email protected]>> Date: Monday, June 25, 2018 at 3:59 PM To: Emoly Liu <[email protected]<mailto:[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 _______________________________________________ lustre-discuss mailing list [email protected]<mailto:[email protected]> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org _______________________________________________ lustre-discuss mailing list [email protected]<mailto:[email protected]> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
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