Longhorn is cloud native distributed block storage for Kubernetes, supported by Rancher Labs headquartered in Cupertino.
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Quantum ActiveScale
Score 7.0 out of 10
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Quantum offers the ActiveScale cloud object storage system, acquired from Western Digital February 2020, designed to provide a highly durable, scale-out economic storage system. ActiveScale is a more recent model replacing the former Amplidata Object Storage product line that was acquired by Western Digital from HGST in 2015.
Longhorn is performing well as storage for databases and in almost any solution that uses exclusive access to volumes (ReadWriteOnce in Kubernetes nomenclature). When write access is required from many clients (ReadWriteMany) Longhorn Block Storage covers its volumes with NFS (file-based) access. Longhorn Block Storage also is well fitted in every architecture where data security (snapshots, backups, multiple replicas) is more important than access speed (in terms on IOPS and MiB/s).
Enterprise grade organizations with B2B clientele would be served well by using this product. It alleviates the need for an on-premise storage solution by offering a cloud-based alternative. Smaller organizations with less data capacity needs would be better served with an in-house solution, unless they come out with more reasonable pricing down the road.
ReadWriteMany Longhorn volumes are still using NFS (file-based) protocol in the core.
Using iSCSI as main protocol instead of FC ties Longhorn to Ethernet-based LAN which is in most architectures much slower that FC-based SAN.
Longhorn could implement S3 as alternative access protocol to its volumes.
Backups, and snapshots configuration could be configured at each volume-level by administrators (maybe from additional CRD object?), because currently is configured at storage-class level which is not granular enough.
It has been a fantastic solution, and now it is so highly integrated into our business, it would be difficult to imagine continuing to without it. It is part of our customer contracts as well, and it saves us from having to invest in the on-premise alternative to provide the required storage capacity.
Longhorn is mature software defined storage solution that is still developed and receive new functionalities. From the beginning every Longhorn volume have multiple (at least two) replicas, can leverage manual or automatic snapshots and backup to external S3 volume. Longhorn provides nice and clear GUI for administrators, but also can be managed from CLI.
GlusterFS was first Persistent Storage solution used in our Kubernetes-based clusters. It is file-based what in some usages led us to many data corruptions. CEPH is object-based persistent storage which can be used as file-based Persistent Storage in Kubernetes. It is also is much more resource-hungry than other solutions including Longhorn. Dell PowerScale (or Isilon) is a hardware-software solution, that provides volumes that can be accessed by file-based NFS and CIFS protocols. Recently was added access to its volumes with object-based S3 protocol. Longhorn is in the middle. It is block-based, it is build on industry standards like iSCSI, performs very well on 10Gbit or faster LAN and commodity hardware (or in virtual machines)
What sets Amplidata apart is the cloud-based storage capability. We’ve realized cost savings due to the fact that we are no longer housing the data on premise, and clients rest assured that they have greater visibility into their data.
Amplidata has enabled us to replace our on-premise data storage for many of our larger clients, thus reducing the cost to deploy and house this ourselves
Clients feel confident in storing their sensitive data with us knowing that they have full management and visibility at their fingertips
The ability to quickly scale allows us to meet the needs of clients of all sizes
