E-HPC Instant enforces two categories of limits: quotas (soft limits that can be increased by submitting a ticket) and service limits (fixed constraints that cannot be changed). Review these limits before deploying workloads to plan your resource requirements.
Quota limits
Quotas apply per Alibaba Cloud account. To request a quota increase, submit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticket.
| Resource | Quota |
|---|
| Total jobs (non-terminal states: Initializing, Waiting, Retrying, Stopping, and Restarting; plus Running) | 10,000 |
| Running jobs | 2,000 |
| Total execution nodes (Initializing, Waiting, Retrying, Stopping, Restarting, and Running states) | 10,000 |
| Running execution nodes | 2,000 |
| Job record retention period | 30 days |
Service limits
| Resource | Limit | How to request an exception |
|---|
| Scheduling policy | Medium scheduling only | None |
| Computing resources | Fixed vCPU and memory combinations only. Custom configurations are not supported. See Available CPU and memory. | Submit a ticketSubmit a ticketSubmit a ticketSubmit a ticketSubmit a ticketSubmit a ticketSubmit a ticketSubmit a ticket |
| Disk size | 20 GiB to 2,048 GiB. The disk must be larger than the application image. | None |
| Supported operating systems | Linux: CentOS 7.x; Ubuntu 18.04, 20.04, 22.04, or 24.04; Alibaba Cloud Linux 2.1903 or 3.2104; Rocky Linux 8.8, 8.9, 9.0, 9.1, 9.2, 9.3, 9.4, or 9.5. Windows: Windows Server 2016, 2019, 2022, or 2025. | None |
| Storage mount | CentOS 7.x, Ubuntu, and Alibaba Cloud Linux only | None |
Available CPU and memory
To request additional vCPU and memory specifications or ratios, submit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticketsubmit a ticket.
| vCPU | Memory (GiB) |
|---|
| 2 | 2, 4, 8, 12, 16 |
| 4 | 4, 8, 16, 24, 32 |
| 6 | 6, 12, 24, 36, 48 |
| 8 | 8, 16, 32, 48, 64 |
| 10 | 10, 20, 40, 60, 80 |
| 12 | 12, 24, 48, 72, 96 |
| 14 | 14, 28, 56, 84, 112 |
| 16 | 16, 32, 64, 96, 128 |