Hi !

I respond to the list, as it may help others.
I also reorder the response.

> On Mon, Jan 18, 2021 at 2:41 PM Gilles Mocellin <
>
> gilles.mocellin@nuagelibre.org> wrote:
> > Hello Cephers,
> >
> > On a new cluster, I only have 2 RBD block images, and the Dashboard
> > doesn't manage to list them correctly.
> >
> > I have this message :
> >    Warning
> >    Displaying previously cached data for pool veeam-repos.
> >
> > Sometime it disappears, but as soon as I reload or return to the listing
> > page, it's there.
> >
> > What I've seen, is a high CPU load due to ceph-mgr on the active
> > manager.
> > And also stack-traces like this :
[...]
> > dashboard.exceptions.ViewCacheNoDataException: ViewCache: unable to
> > retrieve data
> >
> > I also see that, when I try to edit an image :
> >
> > 2021-01-18T11:13:26.383+0100 7f00199ca700  0 [dashboard ERROR
> > frontend.error]
> > (https://fidcl-mrs4-sto-sds.fidcl.cloud:8443/#/block/rbd/edit/veeam-> > repos%252Fveeam-repo2-vol1
> > <https://fidcl-mrs4-sto-sds.fidcl.cloud:8443/#/block/rbd/edit/veeam-repos%
> > 252Fveeam-repo2-vol1>): Cannot read property 'features_name' of
> > undefined
> >
> >   TypeError: Cannot read property 'features_name' of undefined
[...]
> >
> > But that's perhaps just becaus I open an Edit window on the image and it
> > does not have the datas.
> > The Edit window is empty, and I can't edit things, especially, I wan't
> > to resize the image.
> >
[...]
> > --
> > Gilles

Le jeudi 21 janvier 2021, 21:56:58 CET Ernesto Puerta a écrit :
> Hey Gilles,
>
> If I'm not wrong, that exception (ViewCacheNoDataException) happens when
> the dashboard is unable to gather all required data from Ceph within a
> defined timeout (5 secs I think, since the UI refreshes the data every ~5
> seconds).
>
> It'd be great if you could provide the steps to reproduce it and some
> insights into your environment (number of RBD pools, number of RBD images,
> snapshots, etc.).
>
> Kind Regards,
>
> Ernesto

OK,
As it is now, it always hapens, on the image listing, I have the Warning and
the list is not always up to date, if I create an image, I must wait very long
to see it.
Also, I can not edit the 2 big images I have. Perhaps the size is important,
they are 2 images of 40 TB.
If I create a 1 GB test image, I can edit and resize it.
But impossible withe the big image, the windows opens but all the fields are
empty.

Also, if it can matter, the images use a data pool (EC 3+2).

I have 2 pools, a replicated one for metadatas veeam-repos (replic x3), and a
data pool veeam-repos.data (EC 3+2).
My cluster has 6 nodes with AMD 16 cores CPU, 128 GB RAM, 10 8 TB HDD.
So 60 OSD. Soon doubling everything to 12 nodes.

Usage, as the pool and image names can tell, is to mount RBD image as a XFS
filesystem for a Veeam Backup Repository (krbd, because nbd-rbd tailed
regularly, especially during fstrim).