Cirrus Migrate Cloud vs StoneFly Migrate

Cirrus Migrate Cloud is a web-based service for moving block-storage data to and between cloud environments. It can migrate data while workloads remain in use, helping organizations continue operating during the move. Cirrus Data says its Transparent Data Intercept and cMotion technologies support minimal-downtime migrations. The service provides more than 30 block-storage plugins, automated migration operations, predefined playbooks, actionable insights, cutover orchestration, and migration reporting. It supports Windows and Linux workloads and is described as working with any block-storage vendor or public cloud, with migrations from hypervisors, bare metal, or hosted environments. It is available through the AWS, Microsoft Azure, and Oracle Cloud marketplaces. Cirrus Data says data is encrypted in flight using AES 256-bit encryption; its Customer Center offers basic and premium support 24x7x365. The general service is paid with pricing on request, and its product page invites visitors to schedule a demo. A separate Amazon FSx for NetApp ONTAP trial offers 1 TB free for 30 days. The service is aimed at organizations moving block storage across on-premises, cloud, and multicloud environments.

StoneFly Migrate transfers unstructured NFS and CIFS/SMB data volumes over LAN or WAN. It supports scheduled migration jobs and real-time replication for those volumes, with a centralized console for managing jobs and monitoring resource consumption. Files are divided into smaller data sets, transferred in parallel and recombined at the destination. Hash checks verify individual shards; if one is corrupted, that shard can be retransferred rather than sending the whole file again. The software also analyzes CPU, memory and network resources and dynamically assigns them to processes.

StoneFly presents it for moving NAS volumes to new appliances, maintenance moves, offloading infrequently accessed data to capacity tiers and syncing critical volumes. The software is free, with no data-transfer limit, but technical support and professional services are sold separately. It is delivered as an OVA virtual machine and is compatible with VMware; the FAQ also lists VMware, Hyper-V, KVM, Citrix and XenServer for virtual NAS deployments. For physical NAS to virtual NAS transfers, both appliances must be on the same subnet. File transfers can be encrypted.