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One question out of a few experiments: What is the prerequisite for the Ceph GUI to communicate with the cluster? I always thought the monitor daemon is needed on a node to have a working Ceph GUI on that same node. But today we tested to deploy big clusters with few monitor nodes. So we had a...

Is it working?

Ich bin gerade zufällig über diesen Thread gestolpert. Auch wenn er ein wenig älter ist: Linux Bridges verhalten sich im Normalfall NICHT wie ein Hub, sondern wie ein Switch. Das kann recht einfach nachvollzogen werden: 3 Linux-VM an der gleichen vmbr, z.B. vmbr5 ping VM1 -> VM2 auf VM3...

We came over that topic for one our customers from our it security department a time ago. We got quite deep in this. Our strong recommendation is to use SED - self encrypting devices. In fact, a lot of server HDD are SED and only depend on a supporting BIOS. LUKS is great for older setups, but...

Tried also with and without jemalloc - same problem.

Same here. I opened a ticket at Ceph's Bug Tracker. But it could really be a problem that there is no stable Ceph release available for PVE 5.0, especially if someone could run into this issue after upgrading from 4.4, expecting a stable release.

There is a Bug in openVZ that prevents using KSM. But as tom said: 3.4 is way out of support - we are closely to 5.0 now. You really should upgrade.