The zero-length objects are created for the file stripes, but if the MDT inodes were deleted, but something went wrong with the MDT before the OST objects were deleted, then the objects would be left behind.
If the objects are in lost+found with the FID as the filename, then the file itself is almost certainly already deleted, so fid2path would just return the file in lost+found. I don't think there would be any problem to delete them. Cheers, Andreas > On Oct 18, 2023, at 08:30, Daniel Szkola <dszk...@fnal.gov> wrote: > > In this case almost all, if not all, of the files look a lot like this: > > -r-------- 1 someuser somegroup 0 Dec 31 1969 > '[0x200012392:0xe0ad:0x0]-R-0’ > > stat shows: > > # stat [0x200012392:0xe0ad:0x0]-R-0 > File: [0x200012392:0xe0ad:0x0]-R-0 > Size: 0 Blocks: 1 IO Block: 4194304 regular empty file > Device: a75b4da0h/2807778720d Inode: 144116440360870061 Links: 1 > Access: (0400/-r--------) Uid: (43667/ someuser) Gid: ( 9349/somegroup) > Access: 1969-12-31 18:00:00.000000000 -0600 > Modify: 1969-12-31 18:00:00.000000000 -0600 > Change: 1969-12-31 18:00:00.000000000 -0600 > Birth: 2023-01-11 13:01:40.000000000 -0600 > > Not sure what these were or how they ended up in lost+found. I took this > lustre fs over from folks who have moved on and I’m still trying to wrap my > head around some of the finer details. In a normal linux fs, usually, not > always, the blocks will have data in them. These are all zero-length. My > inclination is to see if I can delete them and be done with it, but I’m a bit > paranoid. > > — > Dan Szkola > FNAL > > > > > >> On Oct 17, 2023, at 4:23 PM, Andreas Dilger <adil...@whamcloud.com> wrote: >> >> The files reported in .lustre/lost+found *ARE* the objects on the OSTs (at >> least when accessed through a Lustre mountpoint, not if accessed directly on >> the MDT mounted as ldiskfs), so when they are deleted the space on the OSTs >> will be freed. >> >> As for identification, the OST objects do not have any name information, but >> they should have UID/GID/PROJID and timestamps that might help >> identification. >> >> Cheers, Andreas >> >>>> On Oct 18, 2023, at 03:42, Daniel Szkola <dszk...@fnal.gov> wrote: >>> >>> OK, so I did find the hidden .lustre directory (thanks Darby) and there are >>> many, many files in the lost+found directory. I can run ’stat’ on them and >>> get some info. Is there anything else I can do to tell what these were? Is >>> it safe to delete them? Is there anyway to tell if there are matching files >>> on the OST(s) that also need to be deleted? >>> >>> — >>> Dan Szkola >>> FNAL >>> >>>> On Oct 10, 2023, at 3:44 PM, Vicker, Darby J. (JSC-EG111)[Jacobs >>>> Technology, Inc.] <darby.vicke...@nasa.gov> wrote: >>>> >>>>> I don’t have a .lustre directory at the filesystem root. >>>> >>>> It's there, but doesn't show up even with 'ls -a'. If you cd into it or >>>> ls it, it's there. Lustre magic. :) >>>> >>>> -----Original Message----- >>>> From: lustre-discuss <lustre-discuss-boun...@lists.lustre.org >>>> <mailto:lustre-discuss-boun...@lists.lustre.org>> on behalf of Daniel >>>> Szkola via lustre-discuss <lustre-discuss@lists.lustre.org >>>> <mailto:lustre-discuss@lists.lustre.org>> >>>> Reply-To: Daniel Szkola <dszk...@fnal.gov <mailto:dszk...@fnal.gov>> >>>> Date: Tuesday, October 10, 2023 at 2:30 PM >>>> To: Andreas Dilger <adil...@whamcloud.com <mailto:adil...@whamcloud.com>> >>>> Cc: lustre <lustre-discuss@lists.lustre.org >>>> <mailto:lustre-discuss@lists.lustre.org>> >>>> Subject: [EXTERNAL] [BULK] Re: [lustre-discuss] Ongoing issues with quota >>>> >>>> >>>> CAUTION: This email originated from outside of NASA. Please take care when >>>> clicking links or opening attachments. Use the "Report Message" button to >>>> report suspicious messages to the NASA SOC. >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> Hello Andreas, >>>> >>>> >>>> lfs df -i reports 19,204,412 inodes used. When I did the full robinhood >>>> scan, it reported scanning 18,673,874 entries, so fairly close. >>>> >>>> >>>> I don’t have a .lustre directory at the filesystem root. >>>> >>>> >>>> Another interesting aspect of this particular issue is I can run lctl >>>> lfsck and every time I get: >>>> >>>> >>>> layout_repaired: 1468299 >>>> >>>> >>>> But it doesn’t seem to be actually repairing anything because if I run it >>>> again, I’ll get the same or a similar number. >>>> >>>> >>>> I run it like this: >>>> lctl lfsck_start -t layout -t namespace -o -M lfsc-MDT0000 >>>> >>>> >>>> — >>>> Dan Szkola >>>> FNAL >>>> >>>> >>>> >>>> >>>>> On Oct 10, 2023, at 10:47 AM, Andreas Dilger <adil...@whamcloud.com >>>>> <mailto:adil...@whamcloud.com>> wrote: >>>>> >>>>> There is a $ROOT/.lustre/lost+found that you could check. >>>>> >>>>> What does "lfs df -i" report for the used inode count? Maybe it is RBH >>>>> that is reporting the wrong count? >>>>> >>>>> The other alternative would be to mount the MDT filesystem directly as >>>>> type ZFS and see what df -i and find report? >>>>> >>>>> Cheers, Andreas >>>>> >>>>>> On Oct 10, 2023, at 22:16, Daniel Szkola via lustre-discuss >>>>>> <lustre-discuss@lists.lustre.org >>>>>> <mailto:lustre-discuss@lists.lustre.org>> wrote: >>>>>> >>>>>> OK, I disabled, waited for a while, then reenabled. I still get the same >>>>>> numbers. The only thing I can think is somehow the count is correct, >>>>>> despite the huge difference. Robinhood and find show about 1.7M files, >>>>>> dirs, and links. The quota is showing a bit over 3.1M inodes used. We >>>>>> only have one MDS and MGS. Any ideas where the discrepancy may lie? >>>>>> Orphans? Is there a lost+found area in lustre? >>>>>> >>>>>> — >>>>>> Dan Szkola >>>>>> FNAL >>>>>> >>>>>> >>>>>>> On Oct 10, 2023, at 8:24 AM, Daniel Szkola <dszk...@fnal.gov >>>>>>> <mailto:dszk...@fnal.gov>> wrote: >>>>>>> >>>>>>> Hi Robert, >>>>>>> >>>>>>> Thanks for the response. Do you remember exactly how you did it? Did >>>>>>> you bring everything down at any point? I know you can do this: >>>>>>> >>>>>>> lctl conf_param fsname.quota.mdt=none >>>>>>> >>>>>>> but is that all you did? Did you wait or bring everything down before >>>>>>> reenabling? I’m worried because that allegedly just enables/disables >>>>>>> enforcement and space accounting is always on. Andreas stated that >>>>>>> quotas are controlled by ZFS, but there has been no quota support >>>>>>> enabled on any of the ZFS volumes in our lustre filesystem. >>>>>>> >>>>>>> — >>>>>>> Dan Szkola >>>>>>> FNAL >>>>>>> >>>>>>>>> On Oct 10, 2023, at 2:17 AM, Redl, Robert <robert.r...@lmu.de >>>>>>>>> <mailto:robert.r...@lmu.de>> wrote: >>>>>>>> >>>>>>>> Dear Dan, >>>>>>>> >>>>>>>> I had a similar problem some time ago. We are also using ZFS for MDT >>>>>>>> and OSTs. For us, the used disk space was reported wrong. The problem >>>>>>>> was fixed by switching quota support off on the MGS and then on again. >>>>>>>> >>>>>>>> Cheers, >>>>>>>> Robert >>>>>>>> >>>>>>>>> Am 09.10.2023 um 17:55 schrieb Daniel Szkola via lustre-discuss >>>>>>>>> <lustre-discuss@lists.lustre.org >>>>>>>>> <mailto:lustre-discuss@lists.lustre.org>>: >>>>>>>>> >>>>>>>>> Thanks, I will look into the ZFS quota since we are using ZFS for all >>>>>>>>> storage, MDT and OSTs. >>>>>>>>> >>>>>>>>> In our case, there is a single MDS/MDT. I have used Robinhood and lfs >>>>>>>>> find (by group) commands to verify what the numbers should apparently >>>>>>>>> be. >>>>>>>>> >>>>>>>>> — >>>>>>>>> Dan Szkola >>>>>>>>> FNAL >>>>>>>>> >>>>>>>>>> On Oct 9, 2023, at 10:13 AM, Andreas Dilger <adil...@whamcloud.com >>>>>>>>>> <mailto:adil...@whamcloud.com>> wrote: >>>>>>>>>> >>>>>>>>>> The quota accounting is controlled by the backing filesystem of the >>>>>>>>>> OSTs and MDTs. >>>>>>>>>> >>>>>>>>>> For ldiskfs/ext4 you could run e2fsck to re-count all of the inode >>>>>>>>>> and block usage. >>>>>>>>>> >>>>>>>>>> For ZFS you would have to ask on the ZFS list to see if there is >>>>>>>>>> some way to re-count the quota usage. >>>>>>>>>> >>>>>>>>>> The "inode" quota is accounted from the MDTs, while the "block" >>>>>>>>>> quota is accounted from the OSTs. You might be able to see with "lfs >>>>>>>>>> quota -v -g group" to see if there is one particular MDT that is >>>>>>>>>> returning too many inodes. >>>>>>>>>> >>>>>>>>>> Possibly if you have directories that are striped across many MDTs >>>>>>>>>> it would inflate the used inode count. For example, if every one of >>>>>>>>>> the 426k directories reported by RBH was striped across 4 MDTs then >>>>>>>>>> you would see the inode count add up to 3.6M. >>>>>>>>>> >>>>>>>>>> If that was the case, then I would really, really advise against >>>>>>>>>> striping every directory in the filesystem. That will cause problems >>>>>>>>>> far worse than just inflating the inode quota accounting. >>>>>>>>>> >>>>>>>>>> Cheers, Andreas >>>>>>>>>> >>>>>>>>>>> On Oct 9, 2023, at 22:33, Daniel Szkola via lustre-discuss >>>>>>>>>>> <lustre-discuss@lists.lustre.org >>>>>>>>>>> <mailto:lustre-discuss@lists.lustre.org>> wrote: >>>>>>>>>>> >>>>>>>>>>> Is there really no way to force a recount of files used by the >>>>>>>>>>> quota? All indications are we have accounts where files were >>>>>>>>>>> removed and this is not reflected in the used file count in the >>>>>>>>>>> quota. The space used seems correct but the inodes used numbers are >>>>>>>>>>> way high. There must be a way to clear these numbers and have a >>>>>>>>>>> fresh count done. >>>>>>>>>>> >>>>>>>>>>> — >>>>>>>>>>> Dan Szkola >>>>>>>>>>> FNAL >>>>>>>>>>> >>>>>>>>>>>> On Oct 4, 2023, at 11:37 AM, Daniel Szkola via lustre-discuss >>>>>>>>>>>> <lustre-discuss@lists.lustre.org >>>>>>>>>>>> <mailto:lustre-discuss@lists.lustre.org>> wrote: >>>>>>>>>>>> >>>>>>>>>>>> Also, quotas on the OSTS don’t add up to near 3 million files >>>>>>>>>>>> either: >>>>>>>>>>>> >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode0 lfs quota -g somegroup >>>>>>>>>>>> -I 0 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 1394853459 0 1913344192 - 132863 0 0 - >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode0 lfs quota -g somegroup >>>>>>>>>>>> -I 1 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 1411579601 0 1963246413 - 120643 0 0 - >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode1 lfs quota -g somegroup >>>>>>>>>>>> -I 2 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 1416507527 0 1789950778 - 190687 0 0 - >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode1 lfs quota -g somegroup >>>>>>>>>>>> -I 3 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 1636465724 0 1926578117 - 195034 0 0 - >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode2 lfs quota -g somegroup >>>>>>>>>>>> -I 4 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 2202272244 0 3020159313 - 185097 0 0 - >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode2 lfs quota -g somegroup >>>>>>>>>>>> -I 5 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 1324770165 0 1371244768 - 145347 0 0 - >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode3 lfs quota -g somegroup >>>>>>>>>>>> -I 6 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 2892027349 0 3221225472 - 169386 0 0 - >>>>>>>>>>>> [root@lustreclient scratch]# ssh ossnode3 lfs quota -g somegroup >>>>>>>>>>>> -I 7 /lustre1 >>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>> Filesystem kbytes quota limit grace files quota limit grace >>>>>>>>>>>> 2076201636 0 2474853207 - 171552 0 0 - >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> — >>>>>>>>>>>> Dan Szkola >>>>>>>>>>>> FNAL >>>>>>>>>>>> >>>>>>>>>>>>>> On Oct 4, 2023, at 8:45 AM, Daniel Szkola via lustre-discuss >>>>>>>>>>>>>> <lustre-discuss@lists.lustre.org >>>>>>>>>>>>>> <mailto:lustre-discuss@lists.lustre.org>> wrote: >>>>>>>>>>>>> >>>>>>>>>>>>> No combination of ossnodek runs has helped with this. >>>>>>>>>>>>> >>>>>>>>>>>>> Again, robinhood shows 1796104 files for the group, an 'lfs find >>>>>>>>>>>>> -G gid' found 1796104 files as well. >>>>>>>>>>>>> >>>>>>>>>>>>> So why is the quota command showing over 3 million inodes used? >>>>>>>>>>>>> >>>>>>>>>>>>> There must be a way to force it to recount or clear all stale >>>>>>>>>>>>> quota data and have it regenerate it? >>>>>>>>>>>>> >>>>>>>>>>>>> Anyone? >>>>>>>>>>>>> >>>>>>>>>>>>> — >>>>>>>>>>>>> Dan Szkola >>>>>>>>>>>>> FNAL >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>>> On Sep 27, 2023, at 9:42 AM, Daniel Szkola via lustre-discuss >>>>>>>>>>>>>> <lustre-discuss@lists.lustre.org >>>>>>>>>>>>>> <mailto:lustre-discuss@lists.lustre.org>> wrote: >>>>>>>>>>>>>> >>>>>>>>>>>>>> We have a lustre filesystem that we just upgraded to 2.15.3, >>>>>>>>>>>>>> however this problem has been going on for some time. >>>>>>>>>>>>>> >>>>>>>>>>>>>> The quota command shows this: >>>>>>>>>>>>>> >>>>>>>>>>>>>> Disk quotas for grp somegroup (gid 9544): >>>>>>>>>>>>>> Filesystem used quota limit grace files quota limit grace >>>>>>>>>>>>>> /lustre1 13.38T 40T 45T - 3136761* 2621440 3670016 expired >>>>>>>>>>>>>> >>>>>>>>>>>>>> The group is not using nearly that many files. We have robinhood >>>>>>>>>>>>>> installed and it show this: >>>>>>>>>>>>>> >>>>>>>>>>>>>> Using config file '/etc/robinhood.d/lustre1.conf'. >>>>>>>>>>>>>> group, type, count, volume, spc_used, avg_size >>>>>>>>>>>>>> somegroup, symlink, 59071, 5.12 MB, 103.16 MB, 91 >>>>>>>>>>>>>> somegroup, dir, 426619, 5.24 GB, 5.24 GB, 12.87 KB >>>>>>>>>>>>>> somegroup, file, 1310414, 16.24 TB, 13.37 TB, 13.00 MB >>>>>>>>>>>>>> >>>>>>>>>>>>>> Total: 1796104 entries, volume: 17866508365925 bytes (16.25 TB), >>>>>>>>>>>>>> space used: 14704924899840 bytes (13.37 TB) >>>>>>>>>>>>>> >>>>>>>>>>>>>> Any ideas what is wrong here? >>>>>>>>>>>>>> >>>>>>>>>>>>>> — >>>>>>>>>>>>>> Dan Szkola >>>>>>>>>>>>>> FNAL >>>>>>>>> >>>>>>>>> _______________________________________________ >>>>>>>>> lustre-discuss mailing list >>>>>>>>> lustre-discuss@lists.lustre.org >>>>>>>>> <mailto:lustre-discuss@lists.lustre.org> >>>>>>>>> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.lustre.org_listinfo.cgi_lustre-2Ddiscuss-2Dlustre.org&d=DwIGaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=e9DXjyTaQ786Tg7WH7oIVaQOA1YDRqyxHOUaYU2_LQw&m=fBsuy6PvJ6sM0CR4j5XQgdmXVIcfg7TPKCS_M1GPMH4gO9ZYMYzNwrtCk4VsbxsJ&s=G9xyFTfK33CmMEh4Da4Vor1Iu5u_EwwX04fX1YarFPI&e= >>>>>>>>> >>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.lustre.org_listinfo.cgi_lustre-2Ddiscuss-2Dlustre.org&d=DwIGaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=e9DXjyTaQ786Tg7WH7oIVaQOA1YDRqyxHOUaYU2_LQw&m=fBsuy6PvJ6sM0CR4j5XQgdmXVIcfg7TPKCS_M1GPMH4gO9ZYMYzNwrtCk4VsbxsJ&s=G9xyFTfK33CmMEh4Da4Vor1Iu5u_EwwX04fX1YarFPI&e=> >>>>>>>> >>>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> lustre-discuss mailing list >>>>>> lustre-discuss@lists.lustre.org <mailto:lustre-discuss@lists.lustre.org> >>>>>> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.lustre.org_listinfo.cgi_lustre-2Ddiscuss-2Dlustre.org&d=DwIGaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=e9DXjyTaQ786Tg7WH7oIVaQOA1YDRqyxHOUaYU2_LQw&m=fBsuy6PvJ6sM0CR4j5XQgdmXVIcfg7TPKCS_M1GPMH4gO9ZYMYzNwrtCk4VsbxsJ&s=G9xyFTfK33CmMEh4Da4Vor1Iu5u_EwwX04fX1YarFPI&e= >>>>>> >>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.lustre.org_listinfo.cgi_lustre-2Ddiscuss-2Dlustre.org&d=DwIGaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=e9DXjyTaQ786Tg7WH7oIVaQOA1YDRqyxHOUaYU2_LQw&m=fBsuy6PvJ6sM0CR4j5XQgdmXVIcfg7TPKCS_M1GPMH4gO9ZYMYzNwrtCk4VsbxsJ&s=G9xyFTfK33CmMEh4Da4Vor1Iu5u_EwwX04fX1YarFPI&e=> >>>> >>>> >>>> _______________________________________________ >>>> lustre-discuss mailing list >>>> lustre-discuss@lists.lustre.org <mailto:lustre-discuss@lists.lustre.org> >>>> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.lustre.org_listinfo.cgi_lustre-2Ddiscuss-2Dlustre.org&d=DwIGaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=e9DXjyTaQ786Tg7WH7oIVaQOA1YDRqyxHOUaYU2_LQw&m=0w70-kOuiuQFGBYkAfiiTTpCg4Y0hyNsE5eiNjaEKABgaZXRMVf3O2sqLq2-1HIC&s=LcunTK-Jz7cEyPzFriWsTM8uxubSE1NHq-DZOLUHXZ4&e= >>>> >>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.lustre.org_listinfo.cgi_lustre-2Ddiscuss-2Dlustre.org&d=DwIGaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=e9DXjyTaQ786Tg7WH7oIVaQOA1YDRqyxHOUaYU2_LQw&m=0w70-kOuiuQFGBYkAfiiTTpCg4Y0hyNsE5eiNjaEKABgaZXRMVf3O2sqLq2-1HIC&s=LcunTK-Jz7cEyPzFriWsTM8uxubSE1NHq-DZOLUHXZ4&e= >>>> > >>>> >>>> >>>> >>> >> >> Cheers, Andreas >> -- >> Andreas Dilger >> Lustre Principal Architect >> Whamcloud >> >> >> >> >> >> >> > _______________________________________________ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
