Press Release

English | German Boosts Storage Performance 2,000% in the OpenStack Cloud With Excelero and Mellanox

achieves 10x lower IO latency than Ceph through all layers in the virtual machine; avoids appliance costs, hassles and sets a solid foundation for rapid business growth

SAN JOSE, CA June 6, 2018 – Excelero, a disruptor in software-defined block storage, announced that its customer, an innovative service provider offering both public and private OpenStack clouds, has deployed Excelero’s NVMesh™ Server SAN along with Mellanox SN2100 switches to enable exceptional 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.
Want 2,000% more #OpenStack storage performance than #Ceph? @teutoStack got it and more with @ExceleroStorage @MellanoxTech @BostonGermany Click To Tweet
“We based our teutoStack public Cloud around Ceph, so we know its many strengths – and challenges,” said Burkhard Noltensmeier, CEO at “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 seamless 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 Server & Storage Solutions GMBH and with Mellanox, commenced testing NVMesh. The combined Excelero/Mellanox performance delivered 8,000 IOPS per virtual machine, compared to 400 IOPS per VM with Ceph, such that now 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 latencies of up to 2.5 milliseconds – latency which drives down IOPS, especially at low queue lengths. Excelero achieves 10x lower IO Latency – around 250 microseconds – through all layers in the virtual machine.

teutoStack Cloud runs Excelero on SuperMicro servers from Boston Server & Storage Solutions GMBH along with Mellanox ConnectX®-4 and ConnectX-5 NICs running 2x25Gb Ethernet 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 at Mellanox Technologies.

“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 Server & Storage Solutions GMBH to help and others to deliver OpenStack to more markets,” said Yaniv Romem, CTO and co-founder of Excelero.

About Excelero

Excelero enables enterprises and service providers to design scale-out storage infrastructures leveraging standard servers and high-performance flash storage. Founded in 2014 by a team of storage veterans and inspired by the tech giants’ shared-nothing architectures for web-scale applications, the company has designed a software-defined block storage solution that meets performance and scalability requirements of the largest web-scale and enterprise applications.

With Excelero’s NVMesh, customers can build distributed, high-performance server SAN for mixed application workloads. Customers benefit from the performance of local flash, with the convenience of centralized storage while avoiding proprietary hardware lock-in and reducing the overall storage TCO. The solution has been deployed for hyper-scale Industrial IoT services, machine learning applications and massive-scale simulation visualization.

Follow us on Twitter @Excelerostorage, on LinkedIn or visit us at to learn more.

Press Contacts: 

Tom Leyden
Vice President of Corporate Marketing
Cell US +1 818 919 8478

Federica Monsone
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+44 (0) 1252 875 203

Mary Kae Marinac
US Media Contact
phone 978-685-3136