15. System Limits and Requirements
This chapter describes general limits and requirements of VDURA systems.
| Limit | Description |
|---|---|
| Smallest V5000 system | 3 Directors and 3 Storage Nodes |
| Largest system | • No enforced limit • VDURA has tested up to 1300 OSDs |
| Maximum number of files or directories | No enforced limit |
| Maximum file size | • 32-bit Linux DirectFlow: 16 TB • 64-bit Linux DirectFlow: 8192 PB |
| Maximum number of volumes | • Per Director: no limit • Per StorageSet: no limit • Per realm: Default of 1200, up to 4096 |
| Maximum number of Realm Managers (RMs) in repset | 5 |
| Maximum StorageSet size | No enforced limit |
| Maximum number of entries per directory | • 1,000,000 (contact VDURA if more are needed) • 250,000 (recommended) |
| Maximum number of clients | 5000 |
| Maximum path length | 4096 bytes |
| Maximum file name length | • 512 bytes • May be limited further by the client operating system |
| Minimum physical client memory | 1 GB |
| Maximum number of mounted realms | 1024 total global and local mounts |
| Maximum number of IP aliases | • 100 per NIC per Director, but no more than 512 per realm • This is configured when the realm is created |
| Maximum number of hard links | 255 |