22 May
2021
22 May
'21
2:19 p.m.
Sorry, above post has to be corrected as:"Out of
the info now
emerged so far seems Ceph client wanted to write an object of size
1555896 but managed to write only 1540096 bytes to the journal."
Yes, I would think so, too.
I think what we need to do now is:
1. Get the MDS.0 recover, discard if necessary part of the object
200.00006048 and bring the MSD.0 up.
Yes, I agree, I just can't tell what the best way is here, maybe
remove all three objects from the disks (make a backup before doing
that, just in case) and try the steps to recover the journal (also
make a backup of the journal first):
mds01:~ # systemctl stop ceph-mds(a)mds01.service
mds01:~ # cephfs-journal-tool journal export myjournal.bin
mds01:~ # cephfs-journal-tool --rank=cephfs:0 event recover_dentries summary
mds01:~ # cephfs-journal-tool --rank=cephfs:0 journal reset
mds01:~ # cephfs-table-tool all reset session
mds01:~ # systemctl start ceph-mds(a)mds01.service
mds01:~ # ceph mds repaired 0
mds01:~ # ceph daemon mds.mds01 scrub_path / recursive repair
2. Do the same recovery for the MSD.1 as in step 1 and
bring MDS.1 also up.
If step 1 succeeds the standby daemons will most likely also start
successfully.
Zitat von Sagara Wijetunga <sagarawmw(a)yahoo.com>om>:
> Sorry, above post has to be corrected as:"Out of the info now
> emerged so far seems Ceph client wanted to write an object of
> size 1555896 but managed to write only 1540096 bytes to the journal."
>
> Sagara
> On Saturday, May 22, 2021, 08:29:34 PM GMT+8, Sagara Wijetunga
> <sagarawmw(a)yahoo.com> wrote:
>
> Out of the info now emerged so far seems Ceph client wanted to
> write an object of size 1555896 but managed to write only 1555896
> bytes to the journal.
> I think what we need to do now is:1. Get the MDS.0 recover, discard
> if necessary part of the object 200.00006048 and bring the MSD.0 up.
2. Do the same recovery for the MSD.1 as in step 1 and
bring MDS.1 also up.
> 3. Above two steps to the most probability may bring
CephFS up.
> 4. Once the CephFS is up, scan for corrupted files, remove them and
> bring from backup.
> 5. Get the MDS.2 to sync to MSD.0 or 1 and bring the cluster to
> sync'ed stage.
>
> My question is, what exactly necessary to carry above step 1?
> Sagara
>
>
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