[lustre-discuss] OST "D" status - only 1 OSS mounting

[Sid Young]

Thanks Andreas, The ZFS pools became degraded so I have cold restarted the
storage and the OSTs and everything has come back up after about 5 minutes
of crash recovery.

Ive also worked out using the lfs_migrate and am emptying the full OST.

Is there a tool that cAn specifically check an MDT and its associated OST's?




Sid Young


On Mon, Nov 1, 2021 at 2:11 PM Andreas Dilger <adilger at whamcloud.com> wrote:

> The "D" status means the OST is marked in "Degraded" mode, see the
> lfs-df(1) man page.  The "lfs check osts" is only checking the client
> connection to the OSTs, but whether the MDS creates objects on those OSTs
> really depends on how the MDS is feeling about them.
>
> On Oct 31, 2021, at 19:28, Sid Young via lustre-discuss <
> lustre-discuss at lists.lustre.org> wrote:
>
> Hi all,
>
> I have a really odd issue, only 1 OST appears to mount despite there being
> 4 OSTS available and ACTIVE.
>
> [root at hpc-login-01 home]# lfs df -h
> UUID                       bytes        Used   Available Use% Mounted on
> home-MDT0000_UUID           4.2T       40.2G        4.1T   1% /home[MDT:0]
> home-OST0000_UUID          47.6T       37.8T        9.8T  80% /home[OST:0]
> home-OST0001_UUID          47.6T       47.2T      413.4G 100% /home[OST:1]
> D
> home-OST0002_UUID          47.6T       35.7T       11.9T  75% /home[OST:2]
> home-OST0003_UUID          47.6T       39.4T        8.2T  83% /home[OST:3]
>
> filesystem_summary:       190.4T      160.0T       30.3T  85% /home
>
> [root at hpc-login-01 home]# lfs check osts
> home-OST0000-osc-ffffa10c8f483800 active.
> home-OST0001-osc-ffffa10c8f483800 active.
> home-OST0002-osc-ffffa10c8f483800 active.
> home-OST0003-osc-ffffa10c8f483800 active.
>
> Should be 191TB... only shows 1 OST..
>
> 10.140.93.42 at o2ib:/home     *48T *  48T  414G 100% /home
>
> Where should I look?
>
>
> Cheers, Andreas
> --
> Andreas Dilger
> Lustre Principal Architect
> Whamcloud
>
>
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>
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