nk Schilder
AIT Risø Campus
Bygning 109, rum S14
From: Eugen Block
Sent: Monday, January 20, 2025 6:49 PM
To: Frank Schilder
Cc: ceph-users@ceph.io
Subject: Re: [ceph-users] Re: MDS hung in purge_stale_snap_data after
populating cache
A colleague of mine s
9, rum S14
From: Frank Schilder
Sent: Monday, January 20, 2025 1:51 PM
To: Eugen Block
Cc: ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after
populating cache
which is 3758096384. I'm not even sure what the unit is,
Schilder
AIT Risø Campus
Bygning 109, rum S14
From: Frank Schilder
Sent: Monday, January 20, 2025 1:51 PM
To: Eugen Block
Cc: ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after populating
cache
> which is 3758096384. I
er
AIT Risø Campus
Bygning 109, rum S14
From: Frank Schilder
Sent: Monday, January 20, 2025 1:38 PM
To: Eugen Block
Cc: ceph-users@ceph.io
Subject: Re: [ceph-users] Re: MDS hung in purge_stale_snap_data after
populating cache
Hi Eugen,
I think the default is
s,
=
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
From: Eugen Block
Sent: Monday, January 20, 2025 1:25 PM
To: Frank Schilder
Cc: ceph-users@ceph.io
Subject: Re: [ceph-users] Re: MDS hung in purge_stale_snap_data after
populating cache
Hi,
right, I ha
: Monday, January 20, 2025 12:40 PM
To: Frank Schilder
Cc: ceph-users@ceph.io
Subject: Re: [ceph-users] Re: MDS hung in purge_stale_snap_data
after populating cache
It looks like a hard-coded max for the throttle:
write_buf_throttle(cct, "write_buf_throttle", UINT_MAX - (UINT_MAX >>
: Frank Schilder
Cc: ceph-users@ceph.io
Subject: Re: [ceph-users] Re: MDS hung in purge_stale_snap_data after
populating cache
It looks like a hard-coded max for the throttle:
write_buf_throttle(cct, "write_buf_throttle", UINT_MAX - (UINT_MAX >> 3)),
which is 3758096384. I'm n
ed.
Best regards,
=
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
____________
From: Eugen Block
Sent: Monday, January 20, 2025 11:12 AM
To: ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after
populating
=
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
________
From: Eugen Block
Sent: Monday, January 20, 2025 11:12 AM
To: ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after populating
cache
Hi Frank,
are you able to
, rum S14
________________
From: Frank Schilder
Sent: Friday, January 17, 2025 3:02 PM
To: Bailey Allison; ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after
populating cache
Hi Bailey.
ceph-14 (rank=0): num_stray=205532
ceph-13 (rank=1):
ocklist_on_timeoutfalse
Best regards,
=
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
________________
From: Bailey Allison
Sent: Thursday, January 16, 2025 10:08 PM
To: ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after populating
cache
Fra
mpus
Bygning 109, rum S14
From: Bailey Allison
Sent: Thursday, January 16, 2025 10:08 PM
To: ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after populating
cache
Frank,
Are you able to share an update to date ceph config dump a
10:08 PM
To: ceph-users@ceph.io
Subject: [ceph-users] Re: MDS hung in purge_stale_snap_data after populating
cache
Frank,
Are you able to share an update to date ceph config dump and ceph daemon
mds.X perf dump | grep strays from the cluster?
We're just getting through our comically long
Frank,
Are you able to share an update to date ceph config dump and ceph daemon
mds.X perf dump | grep strays from the cluster?
We're just getting through our comically long ceph outage, so i'd like
to be able to share the love here hahahaha
Regards,
Bailey Allison
Service Team Lead
45Driv
I think I finally found the moment where everything goes downhill. Please take
a look at this comment:
https://tracker.ceph.com/issues/69547?next_issue_id=69546#note-4 . This looks a
lot like a timeout, but I have no clue what to look for. Any hint is greatly
appreciated.
Thanks and best regar
The MDS was up over night and it started showing CPU load again. I added a
screen show to the imgur post
(https://imgur.com/a/mds-hung-purge-stale-snap-data-after-populating-cache-RF7ExSP).
Unfortunately, its only the messenger threads. The MDS seems to idle around.
Best regards,
==
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