Recent content by lucaferr

Hello! I have a 10 nodes hyperconverged cluster. Each node has 4 OSDs (total 40 OSDs). I have 2 different questions: QUESTION 1 - OSD REPLACEMENT (with identical SSD) Since I need to replace an SSD (one OSD has crashed 3 times in latest months so I prefer to replace it with a brand new one)...

I answer myself: the procedure worked perfectly. However, you must take into account that, once the disk of the VM is GTP, you can no longer expand it with growpart: you have to do it like this

I can confirm that in latest PVE 6.4, as well as in PVE 5.4, a pve-firewall restart set them all to 1 and fixes the problem (and can be safely run in production, since it doesn't interrupt the networking, I've run it dozens of times on hosts running tens of mission critical VMs). Unfortunately I...

Hi, I have a growing Linux Debian 9 VM that I need to expand to 3 TB. I've expanded it from Proxmox interface and it correctly reports 3 TB size. But I'm unable to grow the partition over 2 TB because the virtual disk has a MBR. The VM is mission critical so I must carefully plan the operation...

I apologise, the monitoring system was reporting incorrect I/O data because the iostat output used changed between PVE 5 and PVE 6. So false alarm, PVE 6 with Ceph Octopus works perfectly! I mark the topic as [SOLVED]

Hi Fabian, the first OSD restart did took 5 to 10 minutes, during which the upgraded OSD where down and the CPU on the node very high....but then, once all the OSDs went up on all nodes and Ceph went back to HEALTH_OK I assumed that the upgrade process was completed. Did I assume wrong? Also...

Hi! Last night we upgraded our production 9-nodes cluster from PVE 5.4 to PVE 6.4 and from Ceph 12 to 14 and then to 15 (Octopus), following the official tutorials. Everything went smoothly and all running VMs have been online during the upgrade, so we're very happy about the operation. Now the...

As I wrote above, Samsung 960 Pro and Samsung 970 Pro

Thank you for all your considerations. I'll go for the cheaper 10 Gb/s switch for this small cluster (the unmanaged 5 ports). Regarding 960/970 Pro SSDs, I've built much bigger clusters (10 nodes, hundreds of VMs) with Ceph using only Samsung NVMe prosumer drives and I'm really satisfied with...

For this particular cluster, which is very small (3 nodes) I was considering a 8 port managed 10 Gb/s (Netgear XS708T) vs a 5 port unmanaged 10 Gb/s (Netgear XS505M). The last one is cheaper and has 4.8 microseconds latency, while the first one costs more and has 2.8 microseconds latency. I've...

I just downloaded the datasheets :) Ok guys, I googled and thought about it a bit (maybe I should have done it sooner). As I told you, the two switches differ by 2 microseconds. Then I figured out that: A SATA SSD has a read latency of not less than 30 ms (30 milliseconds --> 30000...

Hi! I'm comparing 2 switches with 10 Gb/s ports, tu build a small 3-nodes cluster with with PVE+Ceph. Ceph will run on NVMe drives. One switch has a latency of 2.8 microseconds at 10 Gb/s, while the other (which is cheaper) has 4.8 microseconds at 10 Gb/s. Does this difference matters at all...

Unfortunately the problem is still there: every couple of months I have to shutdown and restart the machine to free up the tons of memory consumed (instead of the 4 GB allocated)

Many thanks, it worked! Here the steps that I followed, for anyone else interested: rbd ls -l <poolname> (to get the snapshot name) rbd showmapped (just to check that the snapshot is not already mapped) mkdir <mountpoint> rbd map --read-only <poolname>/<diskname>@snapname rbd showmapped (just...

Thank you Alwin! Could you please tell me the steps to map in read-only on the Proxmox VE node? I think you already answered "yes, this is safe". It was just a warning not to point me to an emergency hack if it involved any risk, since I have a plan B ;) Yep, you're perfectly right, upgrade to...