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COSBench - Cloud Object Storage Benchmark

COSBench is a benchmarking tool to measure the performance of Cloud Object Storage services. Object storage is an emerging technology that is different from traditional file systems (e.g., NFS) or block device systems (e.g., iSCSI). Amazon S3 and Openstack* swift are well-known object storage solutions.

COSBench now supports OpenStack* Swift, Amazon* S3, Amplidata v2.3, 2.5 and 3.1, Scality*, Ceph, CDMI, Google* Cloud Storage, Aliyun OSS as well as custom adaptors.

Important Notice and Contact Information

a) COSBench is not a product, and it does not have a full-time support team. Before you use this tool, please understand the need to invest enough effort to learn how to use it effectively and to address possible bugs.

b) To help COSBench develop further, please become an active member of the community and consider giving back by making contributions.


a) Intel source code is being released under the Apache 2.0 license.

b) Additional libraries used with COSBench have their own licensing; refer to 3rd-party-licenses.pdf for details.

Distribution Packages

Please refer to "" to get the link for distribution packages.

Installation & Usage

Please refer to "COSBenchUserGuide.pdf" for details.

Adaptor Development

If needed, adaptors can be developed for new storage services; please refer to "COSBenchAdaptorDevGuide.pdf" for details.


If a build from source code is needed, please refer to for details.


Wiki: (

Issue tracking: (

Mailing list: (

*Other names and brands may be claimed as the property of others.

Other related projects

COSBench-Workload-Generator: (

COSBench-Plot: (

COSBench-Appliance: (

COSBench Ansible Playbook:

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