CPFS for Lingjun file systems support dual-channel parallel access via VSC high-speed access and VPC. This topic describes the performance specifications, capacity specifications, and applicable advanced features of CPFS for Lingjun.
File system performance specifications
When you access a CPFS for Lingjun file system over the VSC high-speed access channel using RDMA, the performance specifications are as follows:
|
Metric |
CPFS for Lingjun 400 MB/s/TiB baseline (invitational preview) |
|
Read throughput |
min{400 × storage capacity (TiB), 400,000} MBps. Up to 2 TB/s. To increase read throughput, submit a ticket. |
|
Write throughput |
min{200 × storage capacity (TiB), 200,000} MBps |
|
Maximum throughput per client (the maximum speed at which a single server accesses the file system) |
25 GB/s |
|
Read IOPS |
min{6,800 × storage capacity (TiB), 6,800,000}. Up to 30,000,000. To increase read IOPS, submit a ticket. |
|
Write IOPS |
min{2,300 × storage capacity (TiB), 2,300,000} |
|
Average single-stream 4 KB read latency |
0.25 ms |
|
Average single-stream 4 KB write latency |
0.6 ms |
When you access a CPFS for Lingjun file system over a VPC, the performance specifications are as follows:
|
Metric |
CPFS for Lingjun 400 MB/s/TiB baseline (invitational preview) |
|
Read throughput |
The default read bandwidth of a single file system is 10 GB/s. If you require higher VPC bandwidth, submit a ticket. |
|
Write throughput |
The default write bandwidth of a single file system is 5 GB/s. If you require higher VPC bandwidth, submit a ticket. |
|
Maximum throughput per client |
5 GB/s |
|
Average single-stream 4 KB read latency |
0.75 ms |
|
Average single-stream 4 KB write latency |
1 ms |
When a CPFS for Lingjun file system is accessed simultaneously over VSC and VPC, the larger the VPC bandwidth, the smaller the VSC-RDMA bandwidth.
Cross-zone access through VPC mount targets is supported. Latency and throughput are affected by the network distance between zones and are higher than in same-zone scenarios. If you are sensitive to latency, we recommend that you deploy compute instances and the CPFS for Lingjun file system in the same zone.
Capacity specifications
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Minimum capacity: 10 TiB
-
Scale-up step size: 10 TiB
-
Maximum capacity: 1 PiB
File systems up to 20 PiB can be created with a step size of 300 TiB. To apply, submit a ticket.
For scale-up limits, see Limitations.