• Home Boosts Storage Performance “2,000%” in OpenStack Cloud

With Excelero and Mellanox, vetoing Dell EMC ScaleIO not supporting NVMe-oF and costly
This is a Press Release edited by on 2018.06.12

Excelero, Inc. announced that its customer Netzdienste GmbH, a service provider offering both public and private OpenStack clouds, has deployed its NVMesh Server SAN along with Mellanox SN2100 switches to enable performance with low-latency block storage in its teutoStack Cloud.

As more customers need storage suitable for demanding databases that exceed Ceph's performance, achieved a 2,000% performance gain and 10x lower IO latency with NVMesh compared to Ceph while avoiding costly, less scalable appliances and proprietary vendor solutions.

"We based our teutoStack public cloud around Ceph, so we know its many strengths - and challenges," said Burkhard Noltensmeier, CEO, "Ceph is durable, scalable and fast for most uses, but with low-latency workloads like databases, Ceph's performance lagged. By moving to Excelero and Mellanox for our teutoStack public cloud offering, we achieved stunning performance with an all-Linux implementation that is streamlined, resilient and automated. More importantly, we're positioned to capture growth areas such as analytics, machine learning and AI where demanding databases require storage to match."

After researching NVMe over Fabrics (NVMe-oF) options, tried iSCSI appliance-based storage solutions, then vetoed them as limiting growth and increasing costs - as well as vetoing Dell EMC ScaleIO which didn't support NVMe-oF and was costly.

In noting Excelero was software-only, hardware-agnostic and partnered with both its long-time system integrator Boston Limited and with Mellanox, commenced testing NVMesh. The combined Excelero/Mellanox performance delivered 8,000 IO/s per VM, compared to 400 IO/s per VM with Ceph, such that recommends the Excelero-based teutoStack cloud for customers with demanding private cloud OpenStack requirements.

In addition, due to its design Ceph typically runs at higher latency of up to 2.5ms  - latency which drives down IO/s, especially at low queue lengths. Excelero achieves 10x lower IO Latency - around 250μs - through all layers in the VM. 

teutoStack Cloud runs Excelero on SuperMicro servers from Boston Limited along with Mellanox ConnectX-4 and ConnectX-5 NICs running 2x25GbE to each client node. It uses OpenStack Cinder to manage storage. With both Mellanox and Excelero's support for Ubuntu, has an all-Linux implementation for easy integrated orchestration and monitoring.

"Demanding IaaS or PaaS services need more than just performance from Ethernet switches today - they also need easy automation and management. After trying another switch vendor failed to meet these key requirements, the Mellanox SN2100 was an obvious choice. Mellanox makes it easy to integrate its switches with Linux operations, so service providers like can keep their focus on running their business and not running their infrastructure," said John F. Kim, director, storage marketing, Mellanox. 

"There's tremendous interest in high-performance OpenStack storage as data centers move away from iSCSI and toward hardware-agnostic architectures, yet few vendors who can deliver what's needed.  We're delighted that Excelero's NVMesh proved itself in's demanding private OpenStack cloud, and look forward to working with Mellanox and Boston Ltd. to help and others to deliver OpenStack to more markets," said Yaniv Romem, CTO and co-founder, Excelero.

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