Hello, We have deployed ceph cluster and we are trying to debug a massive drop in performance between the RADOS layer vs the RGW layer
## Cluster config 4 OSD nodes (12 Drives each, NVME Journals, 1 SSD drive) 40GbE NIC 2 RGW nodes ( DNS RR load balancing) 40GbE NIC 3 MON nodes 1 GbE NIC ## Pool configuration RGW data pool - replicated 3x 4M stripe (HDD) RGW metadata pool - replicated 3x (SSD) pool ## Benchmarks 4K Read IOP/s performance using RADOS Bench 48,000~ IOP/s 4K Read RGW performance via s3 interface ~ 130 IOP/s Really trying to understand how to debug this issue. all the nodes never break 15% CPU utilization and there is plenty of RAM. The one pathological issue in our cluster is that the MON nodes are currently on VMs that are sitting behind a single 1 GbE NIC. (We are in the process of moving them, but are unsure if that will fix the issue. What metrics should we be looking at to debug the RGW layer. Where do we need to look? --- Ravi Patel, PhD Machine Learning Systems Lead Email: r...@kheironmed.com -- *Kheiron Medical Technologies* kheironmed.com <http://kheironmed.com/> | supporting radiologists with deep learning Kheiron Medical Technologies Ltd. is a registered company in England and Wales. This e-mail and its attachment(s) are intended for the above named only and are confidential. If they have come to you in error then you must take no action based upon them but contact us immediately. Any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it is prohibited and may be unlawful. Although this e-mail and its attachments are believed to be free of any virus, it is the responsibility of the recipient to ensure that they are virus free. If you contact us by e-mail then we will store your name and address to facilitate communications. Any statements contained herein are those of the individual and not the organisation. Registered number: 10184103. Registered office: RocketSpace, 40 Islington High Street, London, N1 8EQ
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