Engineering Notes & Research
The Sendense Blog
Plain-language engineering writing on backup, disaster recovery and cross-platform mobility — CloudStack, VMware exit planning, changed block tracking, immutability and provable recovery.
Apache CloudStack Storage and Backup: KVM, Ceph, NFS, Raw Block and Other Data Paths
How primary and secondary storage, the hypervisor and the storage backend decide the backup data path in an Apache CloudStack estate, with the Sendense path for Ceph RBD, NFS, raw block, ZFS, Linstor and more.
Migrating and Protecting VMware Workloads Without VDDK
Sendense uses native VMware integration to migrate and provide backup and continuous replication protection of VMware workloads without the need for VDDK.
EBA Smart Transport: Reduce Backup Traffic on Claims-Enabled Paths
EBA Smart Transport skips repository-held blocks before upload on claims-enabled paths, reducing backup traffic across cloud and tenant networks.
Migrate VMware to CloudStack with Sendense
Configure Sendense replication from VMware to Apache CloudStack in five guided screens, then synchronize, validate, cut over and continue protection.
The VMware Pricing Problem in 2026: Your Backup History Is the Hostage
Subscription-only licensing and bundled renewals are the visible cost. The real lock-in is years of restore points in a VMware-only format — and how to move them.
How to Back Up CloudStack: Host-Assisted CBT for QCOW2/NFS, ZFS, and Linstor/DRBD
CloudStack storage paths expose change signals. See where native or host-assisted change tracking applies and where backup uses a full-source-read EBA path.
What Is Changed Block Tracking (CBT)?
Changed block tracking records which disk blocks changed since the last backup, so incrementals read only those blocks. How CBT works on VMware and CloudStack/KVM.