Disk types in Yandex Managed Service for Valkey™
Yandex Managed Service for Valkey™ allows you to use network and local storage drives for database clusters. Network drives are based on network blocks, which are virtual disks in the Yandex Cloud infrastructure. Local disks are physically located on the database host servers.
When creating a cluster, you can select the following disk types for data storage:
-
Network SSDs (
network-ssd): Balanced solution. Such disks are slower than local SSD storage, but, unlike local disks, they ensure data integrity if Yandex Cloud hardware fails. -
Non-replicated SSDs (
network-ssd-nonreplicated): Network SSDs with enhanced performance achieved by eliminating redundancy.This disk type is only available for Intel Cascade Lake and Intel Ice Lake. For a list of host classes and their respective platforms, see Valkey™ host classes.
The storage size can only be increased in 93 GB increments.
-
Ultra high-speed network SSDs with three replicas (
network-ssd-io-m3): Network disks with the same performance characteristics as non-replicated ones. This disk type provides redundancy.Such disks can be increased in size only in 93 GB increments.
Access to high-performance SSDs is available on request. Contact support or your account manager.
-
Local SSDs (
local-ssd): Disks with the best performance.The size of such a storage can be increased:
- For Intel Broadwell and Intel Cascade Lake: Only in 100 GB increments.
- For Intel Ice Lake: In 368 GB increments only.
For a list of host classes and their respective platforms, see Valkey™ host classes.
For clusters with hosts residing in the
ru-central1-davailability zone, local SSD storage is not available if using Intel Cascade Lake.
Note
Up to 5% of disk space is reserved for system use, so the disks may have less available space than indicated when creating a cluster.
Selecting the disk type during cluster creation
The number of hosts you can create together with a Valkey™ cluster depends on the disk type you select and whether you enabled sharding:
| Disk type | Non-sharded cluster | Sharded cluster |
|---|---|---|
Network SSDs (network-ssd), ultra high-speed network SSDs with three replicas (network-ssd-io-m3) |
1 host or more | 1 host or more (1 shard × 1 host) |
Local SSDs (local-ssd) |
3 hosts or more | 2 hosts or more (1 shard × 2 hosts) |
Non-replicated SSDs (network-ssd-nonreplicated) |
3 hosts or more | 3 hosts or more (1 shard × 3 hosts) |
Sharded clusters with the local-ssd disk type and only one host per shard are not considered fault-tolerant. You cannot create such a cluster.
For more information about limits on the number of hosts per cluster or shard, see Quotas and limits.