As a sidenote: there's the windows rbd driver which will get you waaaay
more performance. It's labeled beta, but it seems to work fine for a lot
of people. If you have a testlab you could try that.
Angelo.
On 19/06/2023 18:16, Work Ceph wrote:
I see, thanks for the feedback guys!
It is interesting that Ceph Manager does not allow us to export iSCSI
blocks without selecting 2 or more iSCSI portals. Therefore, we will always
use at least two, and as a consequence that feature is not going to be
supported. Can I export an RBD image via iSCSI gateway using only one
portal via GwCli?
@Maged Mokhtar, I am not sure I follow. Do you guys have an iSCSI
implementation that we can use to somehow replace the default iSCSI server
in the default Ceph iSCSI Gateway? I didn't quite understand what the
petasan project is, and if it is an OpenSource solution that we can somehow
just pick/select/use one of its modules (e.g. just the iSCSI
implementation) that you guys have.
On Mon, Jun 19, 2023 at 10:07 AM Maged Mokhtar <mmokhtar@xxxxxxxxxxx> wrote:
Windows Clustered Shared Volumes and Failover Clustering require the
support of clustered persistence reservations by the block device to
coordinate access by multiple hosts. The default iSCSI implementation in
Ceph does not support this, you can use the iSCSI implementation in
PetaSAN project:
www.petasan.org
which supports this feature and provides a high performance
implementation. We currently use Ceph 17.2.5
On 19/06/2023 14:47, Work Ceph wrote:
Hello guys,
We have a Ceph cluster that runs just fine with Ceph Octopus; we use RBD
for some workloads, RadosGW (via S3) for others, and iSCSI for some
Windows
clients.
Recently, we had the need to add some VMWare clusters as clients for the
iSCSI GW and also Windows systems with the use of Clustered Storage
Volumes
(CSV), and we are facing a weird situation. In windows for instance, the
iSCSI block can be mounted, formatted and consumed by all nodes, but when
we add in the CSV it fails with some generic exception. The same happens
in
VMWare, when we try to use it with VMFS it fails.
We do not seem to find the root cause for these errors. However, the
errors
seem to be linked to the situation of multiple nodes consuming the same
block by shared file systems. Have you guys seen this before?
Are we missing some basic configuration in the iSCSI GW?
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