Hi,
briefly my setup is as follows:
8 nodes with Proxmox 5.1:
In all the configurations I've found the same problem: after running several benchmarks with rados the results seems to be correct, but the performance of the LXC containers is really poor, compared to KVM. Also I've run tests with fio, sysbench and dd and in all cases the performance of LXC containers is way off the performance of a VM with the same OS.
Also, downloading a big file from a http server (~3GB) inside the container seems to get stuck every few seconds. The same download inside a VM takes place flawlessly.
I'm pretty new with Ceph and I'm not sure where to begin to isolate the problem.
briefly my setup is as follows:
8 nodes with Proxmox 5.1:
- 3 nodes for virtualization
- 5 nodes for Ceph storage, all with monitor+manager, with the following disks:
- 2 spinners (250GB) in ZFS RAID1 for the operative system.
- 4 spinners (1 TB) for data
- 1 NVMe (256G)
In all the configurations I've found the same problem: after running several benchmarks with rados the results seems to be correct, but the performance of the LXC containers is really poor, compared to KVM. Also I've run tests with fio, sysbench and dd and in all cases the performance of LXC containers is way off the performance of a VM with the same OS.
Also, downloading a big file from a http server (~3GB) inside the container seems to get stuck every few seconds. The same download inside a VM takes place flawlessly.
I'm pretty new with Ceph and I'm not sure where to begin to isolate the problem.