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Dear CephFS gurus...
I would like your advise on how to improve performance without compromising reliability for CephFS clients deployed under a WAN. Currently, our infrastructure relies on: - ceph infernalis - a ceph object cluster, with all core infrastructure components sitting in the same data centre: a./ 8 storage servers (8 OSDs per server running on single spins; 2 SSDs with 4 partitions each for OSD journals) b. 3 MONS - one active MDS and another MDS on standby replay mode, also in the same data centre. - OSDs, MONs and MDS all natively connected at 10 Gb/s - cephfs clients mounted via ceph-fuse in different physical geographical locations (different network ranges) - The communication bottleneck between cephfs clients and the core Ceph/CephFS infrastructure is not the network but the 1 GB Eth cards of some of the hosts where cephfs clients are deployed. Although this setup is not exactly what we are aiming in the future, for now, I would like to ask for suggestions of what parameters to tune to improve performance without compromising reliability, specially for those cephfs clients under 1 Gb/s links. In the past I have found some generic article which debated this issue but I am not able to find it now, nor other relevant info. Help is appreciated. Thank you for you feedback Cheers Goncalo |
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