Supported Configurations and Known Limits for Qumulo Core

This section provides an overview of supported configurations and known limits for Qumulo Core.

Supported Configurations

Protocols

FTP
FTPS
NFSv3
NFSv4.1
S3 API (aws CLI)
SMB 2.002
SMB 2.1
SMB 3.0
SMB 3.1
SMB 3.1.1

Clients and Environments

Clients over SMB
- macOS 10.14 (and higher)
- Windows 7 (and higher)
Clients over NFS
- macOS 10.14 (and higher)
- Linux Kernel 2.6.x (and higher)
Qumulo Core Web UI: Google Chrome 80 (and higher)
qq CLI: Python 3.8 (and higher)

Authentication and Directory Services

Domain Functional Level: Microsoft Windows Server 2008 R2 (and higher)

Note
Qumulo Core doesn’t support Samba Domain Controllers.
LDAP Servers: OpenLDAP for Group Expansion

Encryption in Transit

Kerberos V5 Encryption:
- AES128-CTS-HMAC-SHA1
- AES256-CTS-HMAC-SHA1
- RC4-HMAC-MD5

Host System Security

Qumulo Core is up to date with all Ubuntu 24.04 security updates

Known Maximum Limits

Authentication

Active Directory Domains: 1
LDAP Domains: 1

Authorization

Access Control Entries (ACEs) in an Access Control List (ACL): 200

Cluster

Cluster size: 265 nodes
Characters in a cluster name: 2-15, alphanumeric and hyphen (-)

File System

Characters in a file path component (file or directory): 255

Note
Limited by protocol
Characters in a full path (path name): 32,760

Note
Limited by protocol
Hard links for each file: 1,024
File size: 9 exabytes
Number of files in a directory: 4.3 billion
Total number of files: 18 quintillion
Replication relationships: 100

Note
If a directory is more than 100 levels below the file system root directory, it isn’t possible to use it as a replication source.
Snapshots: 40,000
Quotas: 4.3 billion

Note
This approximate value of 2³² is equivalent to the possible maximum of directories or the entire inode space.
S3 Bucket object versions: Unlimited

Note
Theoretically, 4,294,967,296

File System Protocols

REST API

TCP Sockets for each node: 1,000

NFS

Exports: 64,000
Groups: 16

Note
When not using LDAP or Active Directory for RFC 2307 attributes
NFSv4.1 connections for each node: 1,000
TCP sockets for each node: 8,000

Note
A client configured by using the NFS nconnect mount option uses multiple sockets.

SMB

Shares: 40,000
TCP sockets for each node: 5,000

Note
A client configured with the SMB Multichannel feature uses multiple sockets.

S3 API

TCP sockets for each node: 8,000

Note
By default, a maximum of 5,000 connections can execute actively.
Presigned URL expiration (X-Amz-Expires): 604,800 seconds (7 days)

Cloud Data Fabric (CDF)

Portals for each node in a cluster:
- Qumulo Core 7.5.2 (and higher): 32 hub portals and 32 spoke portals
- Qumulo Core 7.5.0.1 to 7.5.1.2: 32 hub portals or 32 spoke portals
Portal root directories for each cluster: 32 spoke portal root directories for each portal relationship