Product limits The following table summarizes PowerFlex supported capabilities and system limits. The PowerFlex GUI is not backward compatible. NOTE: The supported limits described might differ from system enforced limits in the list output of the scli --query_system_limits command. Table 1. Supported capabilities and system limits PowerFlex Item Limit System raw capacity Up to 16 PB . Device size Minimum: 240 GB, Maximum: 8 TB Minimum number of SDSs in a Storage Pool 3 Minimum Storage Pool size 720 GB Minimum devices (drives) per Storage Pool 3, one per Fault Unit Volume size Minimum: 8 GB, Maximum: 1 PB Maximum total number of volumes and snapshots in system 131,072 1 Maximum total number of volumes and snapshots in Protection Domain 32,768 Maximum number of snapshots in a single V-Tree 126 Maximum raw capacity per Protection Domain 8 PB Maximum raw capacity per SDS 128 TB Maximum SDCs per system 1024 Maximum SDSs per system 512 a SDSs per Protection Domain 128 a Maximum devices (drives) per SDS server NOTE: Includes NVDIMM and/or RFcache devices. 64 2 Maximum devices per Protection Domain 8192 Maximum devices per Storage Pool 300 a Maximum acceleration devices of type RFcache (only one Acceleration Pool supported) 8 3, 4 Maximum acceleration devices of type NVDIMM (maximum supported in node) 6 c, d Maximum volumes that can be mapped to a single SDC ESXi 6.0 256 ESXi 6.5 512 ESXi 6.7, 7.0 1024 Other operating systems: 8192 Maximum Protection Domains per system 256 Maximum Storage Pools per system 1024 Maximum Storage Pools per Protection Domain 64 Maximum Fault Sets per Protection Domain 64 a RMcache Minimum: 128 MB, Maximum: 300 GB RFcache The RFcache feature is only supported by 512 Byte devices for the cache use case. RFcache is not supported on 4K devices used for cache. However, RFcache acceleration of 4K storage devices is supported. RFcache capability is supported only on Linux Kernel versions lower than 5.x Fine-Granularity maximum compression 10X of raw capacity Maximum number of snapshots a Snapshot Policy can be defined to retain per V-Tree (not including locked snapshots) 60 Maximum Snapshot Policies per system 1000 Maximum user accounts 256 a Maximum number of concurrent logged-in management clients (GUI/REST/CLI) 128 Maximum volumes that can be mapped via API (scli \REST\WebUI) concurrently 1024 Maximum number of configured syslog servers 16 Volumes per local Consistency Group (snapshot) 1024 Maximum number of volume to SDC mappings per system 262,143 SCSI-3 reservation type Write exclusive registrants only Replication Limits Number of destination systems for replication 1 Maximum number of SDR per system 128 Maximum number of Replication Consistency Group (RCG) 1024 Maximum replication pairs in RCG with initial copy 1024 Maximum number of Volume Pairs per RCG 1024 Maximum Volume Pairs per system 32,000 Maximum number of remote Protection Domains 8 Maximum number of copies per RCG 1 Recovery Point Objective (RPO) Minimum: 15 seconds, Maximum: 1 hour Maximum replicated volume size 64 TB Table 2. Deployment and NDU Limits PowerFlex Item Limit Minimum latency for MDM network 200 msec SDS IP addresses Must be unique. For example, 127.0.0.1 must not be used, as it refers to several machines vSphere PowerFlex plug-in Does not support unmapping a volume from the SDC if it's disconnected Does not support VMDK and RDM mixed environments Adobe flash player is EOL as of 2020-12-31. To continue using the vSphere PowerFlex plug-in, follow the workaround described in the following article: https://www.dell.com/support/kbdoc/en-us/000181275/scaleio-vxflex-adobe-flash-end-of-life-powerflex-vsphere-plugin-workaround RFcache capability is supported only on Linux Kernel versions lower than 5.X. For example, supported RHEL versions: RHEL 8.X Kernel Base: 4.18.0 RHEL 7.X Kernel Base: 3.10.0 Parent topic Supported Product Limits and System RequirementsThe following topics describe the supported product limits and system requirements for the system. 1 If more are needed, contact Customer Support.2 On a VMware server, the maximum devices per SDS is 59.3 An Acceleration Pool can serve multiple Storage Pools, but a single Storage Pool can't use multiple Acceleration Pools. 4 An acceleration device may serve multiple SDS devices, but SDS devices can't span across multiple acceleration devices.