| ZEN Block Storage FAST | ZEN Block Storage HDD | vNAS | BigStor ISCSI | |
| List price for 1TB per month | 250,00€ | 120,00€ | 27,00€ | Between €12.50 and €25.00 in proportion to the subscribed space |
| Technology |
SDS NVMe Block Storage VM VM Persistent Disk Primary VM Disk |
SDS HDD Block Storage VM VM Persistent Disk VM Secondary Disk |
HDD ISCSI/SMB/NFS/S3/Rsync/FTP Persistent O.S. Network Secondary Disk |
HDD ISCSI Persistent O.S. Network Secondary Disk |
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The disk is seen by the hypervisor as a local disk. |
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The disk is mounted by the operating system in iSCSI/SMB/NFS mode. Under Windows with iSCSI, the disk is seen as a "local" disk on the server and is always mounted when Windows starts, while disks connected via SMB/NFS are mounted only after logging in. Under Linux, however, by configuring FSTAB correctly, the disks are mounted with any protocol at startup without problems. |
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| Use Cases |
Database Mail server |
File Server Log MailStore archives Database archives Archives in general |
Second File Server archive Log Archives Shared disk (SMB/NFS only) Systems that do not require the shared disk |
Second File Server archive Log Archives Systems that do not require the shared disk |
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Suitable for all types of data that do not require highly performing disks, but need the disk to always be available. |
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| Minimum size | 10 GB | 100 GB | 10 TB | 1 TB |
| Increments | 10 GB | 100 GB | 10/20/50 TB | Variables |
| Maximum capacity | 1 TB | 10 TB | 50 TB | 500 TB |
| Hardware Architecture | 6 node cluster | 14-node cluster | Single knot | Single knot |
| Suitable for critical data | High | High | Low | Low |
| Data Backup 1Backup + Geographic Replication | ||||
Software-defined storage (SDS) is a system that separates storage management and provisioning from the underlying hardware, enabling greater scalability and fault tolerance.
ZEN storage is based on CEPH technology.
Hypervisors have multiple physical disks that, within a storage domain, are all connected together via two 40Gbit network cards to form a single disk that is larger than the capacity of the individual disks. This is similar to a RAID array of disks created over the network. This storage is created in REPLICA 3 mode. Replica 3 means that to provide 1TB of space, 3 1TB disks are needed.
Data is written to all three disks simultaneously. This configuration allows for simultaneous loss of two of the three disks before the system and operations come to a complete halt.
I Cluster ZEN di CoreTech sono composti da 6 hypervisor. In ogni hypervisor sono presenti almeno 2 dischi NVMe (enterprise per data center) da 7TB, per un totale di 84TB RAW in replica 3 con un totale utilizzabile di 28TB. Tale capacità disco è proporzionata al numero massimo di Cloud Server ZEN che ogni cluster deve ospitare.
To meet the "budget needs" the ZEN Block Storage HDD LP offering was born which uses the combination of SDS CEPH (with 3-way replication) to maintain maximum scalability and fault tolerance and mechanical Hard Disks to contain costs.
Each storage domain consists of at least 14 physical servers.
Su ogni server ci sono diversi dischi meccanici che sono molto più economici degli NVMe. Per aumentare le performance in capo ai dischi meccanici viene utilizzato un sistema di chaching che fa uso di dischi NVMe.
The result of ZEN Block Storage HDD LP is the ability to have very large capacities at a much lower cost, almost half that of ZEB Block Storage.
Persistent disk is a disk that is always available regardless of the type of Operating System, and the login to it.
The two types of ZEN Block Storage disks are persistent disks on the Hypervisor side, this means that even by turning on the server with an ISO of a LIVE operating system, it will be possible to access and see the data present on the various disks.
The disk is connected at the user level, it is a network disk so it cannot be formatted. It can be used simultaneously on multiple servers.
This type of disk cannot be used simultaneously on multiple servers.
For Windows operating systems, this can be automatically reconnected to the operating system only if you log in to it.
For Windows operating systems, this can be automatically reconnected to the operating system only if you log in to it.
On Linux, by properly configuring the /etc/fstab file, it is possible to mount the disk at system startup.
