Technical Parameters and Limitations
HDD storage
The following performance and configuration limits apply per HDD volume. The performance of HDD storage is static and independent of its volume size.
HDD storage performance
Read/write speed, sequential: 200 Mb/s at 1 MB block size
Read/write speed, full random:
Regular: 1,100 IOPS at 4 kB block size
Burst: 2,500 IOPS at 4 kB block size
HDD storage limits
Minimum Size per Volume: 1 GB
Maximum Size per Volume: 4 TB
Larger volumes can be made available on request. For more information, contact IONOS Cloud Support.
SSD storage
SSD storage volumes are available in two performance classes - SSD Premium and SSD Standard. The performance of SSD storage depends on the volume size. Find the respective performance and configuration limits listed below.
SSD Premium storage performance
Read/write speed, sequential: 1 Mb/s pro GB at 1 MB block size
Read speed, full random: 75 IOPS per GB at 4 KB block size
Write speed, full random: 50 IOPS per GB at 4 KB block size
SSD Premium storage limits
Minimum Size per Volume: 1 GB
Maximum Size per Volume: 4 TB
Maximum Read/write speed, sequential: 600 Mb/s per volume at 1 MB block size
Maximum Read speed, full random: 45,000 IOPS at 4 KB block size and min. 4 Cores, 4 GB RAM per volume
Maximum Write speed, full random: 30,000 IOPS at 4 KB block size and min. 4 Cores, 4 GB RAM per volume
Larger volumes can be made available on request. For more information, contact IONOS Cloud Support.
SSD storage performance
The performance of SSD storage is directly related to the volume size. To get the full benefits of high-speed SSDs, we recommend that you book SSD storage units of at least 100 GB. You can use smaller volumes for your VDC, but performance will be suboptimal, compared to that of the larger units. When storage units are configured in DCD, expected performance is predicted based on the volume size (Inspector > Settings). For storage volumes of more than 600 GB the performance is capped at the maximum as specified in the documentation above.
Limitations
IONOS is focused on ensuring the uninterrupted and cost-efficient operation of your services. This is why we offer a selection of tested operating systems for immediate use in your virtual cloud instances. To ensure uninterrupted, secure, and stable performance, all operating systems, regardless of their source, should meet the following requirements:
VirtIO drivers are essential for the operation of virtual network cards.
The following are the recommended drivers for the operation of virtual storage:
VirtIO (maximum performance)
IDE (for vStorage, an alternative connection by IDE is available, but it will not deliver the potential performance offered by IONOS).
QXL drivers are required to use the Remote Console.
We guarantee operation for the selected operating system as long as vendor or upstream support is available.
In general, all current Linux distributions and their derivatives are supported.
Microsoft Windows Server versions are also supported as long as vendor support is available.
The older an OS version, the greater the risk of performance and stability losses. It is recommended that you always switch to the current versions well before the manufacturer's support for your old version expires. This will greatly improve your operating system's security and functionality.
When operating software appliances, it is recommended that you use the images that have been specially prepared for the KVM hypervisor.
If you are using special software appliances or operating systems that are not listed here, contact IONOS Cloud Support. We would be happy to explore the possibility of using such systems within the IONOS Enterprise Cloud and advise you on the best possible implementation.
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