I suspect that (deep-)scrubbing also has an impact on the epoch
increment. I see those in completely idle clusters as well, the
timestamps of deep-scrubs and epoch changes seem to align more or
less. It's not easy to tell without digging really deep into debug logs.
Zitat von Joel Davidow :
I'm seeing a similar increase in osdmap epochs with the only diff from `ceph
osd dump` being epoch and modified date. Duration of osdmap epochs varies a lot
on scale of seconds but are generally less than 10 minutes with a max of about
half an hour. This is in a cephadm cluster running 18.2.4 (u
Sent: Monday, November 18, 2024 4:47 PM
To: Eugen Block; ceph-users@ceph.io
Subject: [ceph-users] Re: constant increase in osdmap epoch
Hi Eugen.
how much changes do you see?
About 1 new map every 5-10 seconds. The time interval varies.
but I would first try to find out what exactly is causing
Campus
Bygning 109, rum S14
From: Frank Schilder
Sent: Monday, November 18, 2024 4:47 PM
To: Eugen Block; ceph-users@ceph.io
Subject: [ceph-users] Re: constant increase in osdmap epoch
Hi Eugen.
> how much changes do you see?
About 1 new map every 5
___
From: Eugen Block
Sent: Monday, November 18, 2024 4:38 PM
To: ceph-users@ceph.io
Subject: [ceph-users] Re: constant increase in osdmap epoch
Hi Frank,
do you use snapshots a lot? Purging snaps would create a new osdmap as
well. Have you checked debug logs of the mon leader to see what
triggers
===
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
From: Eugen Block
Sent: Monday, November 18, 2024 4:38 PM
To: ceph-users@ceph.io
Subject: [ceph-users] Re: constant increase in osdmap epoch
Hi Frank,
do you use snapshots a lot? Purging sna
Hi Frank,
do you use snapshots a lot? Purging snaps would create a new osdmap as
well. Have you checked debug logs of the mon leader to see what
triggers the osdmap change? I see in our moderately used Pacific
cluster "only" around 60 osdmap changes per day (I haven't looked too
deep yet)
