Product Structure
StorM allows you to extend existing clusters or build new clusters by purchasing additional IBM Storage Ceph Ready Nodes hardware for IBM Storage Ceph systems.
Minimum Hardware architecture
▪4 (*) bare metal nodes minimum to support Block and Object protocols
▪gateway servers can be virtualized
▪storage managers and monitors (OSD and MON/MGR) are collocated
▪Supported CPU architecture: x86_64
▪It is recommended to use at least one node more than the number of data redundancy slices. Thus Replica 3 deploys on 3 nodes minimum, but 4 or more are recommended. EC4+2 deploys on 6
nodes minimum, but 7 or more are recommended, etc. This is due to Ceph's self-healing / data redistribution mechanism after temporary node outages. Below the recommended minimum,
performance impact from self-healing will be significant.
▪StorM defaults to the smallest recommended node count that fulfils the given capacity requirements. If the node count is manually decreased below the recommended minimum, there will be a
warning.
▪Small capacity clusters: Generally prefer building these with more nodes, but smaller drives (or drive slots left empty), rather than configuring fewer nodes with highest capacity. The
only way to seriously break Ceph is a lack of nodes & capacity during partial outages.
Figure 286 IBM Storage Ceph minimum hardware configuration
Individual Ceph Components Sizing
Figure 287 Ceph Individual Component Sizing
IBM Storage Ceph Ready Nodes Configurations
IBM Storage Ceph Ready Nodes feature a dedicated 100 GB storage network with redundant switches and server connectivity to enable workloads to stay up in the event of switch or NIC
failure. NVMe drives in the storage rich servers are virtualized with container-native 4+2p Erasure Coding accessed with industry standard CSI drivers.
Table 21 .Product structure comparisons
|
Attribute
|
R750
|
R760
|
|---|---|---|
|
Processors
|
2x Intel Xeon Silver 4314 2.4G 16C processors
|
2x 4th Gen Intel Xeon with up to 56 cores
|
|
RAM
|
256 GB
|
Up to 512 GB
|
|
OS Drives
|
2x 240 GB SSD
|
2x 480 GB M.2 SSD
|
|
Data Acceleration Drives
|
2x 3.84 TB SSD
|
|
|
Chassis - Rack Height
|
2U
|
2U
|
|
Width
|
482 mm (18.97 in.)
|
482 mm (18.97 in.)
|
|
Depth
|
772.11 mm (30.29 in.)
|
772.11 mm (30.29 in.)
|
|
Weight
|
35.3 kg (77.82 lb) max
|
35.3kg (77.82 lb) max
|
|
# of Capacity Drives
|
12
|
Up to 24 NVMe SSD
|
|
Disk Sizes
|
8 TB, 12 TB, 16 TB, 20 TB
|
NVMe SSD: 3.84 TB, 7.68 TB,
15.36 TB
|
|
Network
|
1x 1 GbE
|
1x dual-port 1GbE (motherboard)
|
|
Network
|
1x 10 GbE
|
1x dual-port 10/25GbE (OCP)
|
|
Network
|
|
1x dual-port 100GbE (PCIe),
more optional
|