The sizing is referencing Accelario server
CPU, RAM and Network sizing by data size
Given: | Recommended: | |||
Shape | Data size | Network | CPU | RAM GB |
small | up to 500 GB | 1 Gbps | 4 | 8 |
medium | 500 GB - 1TB | 1 - 5 Gbps | 8 | 16 |
large | 1 - 3 TB | 5 -10 Gbps | 16 | 32 |
X large | 5 - 10 TB | 10 - 20 Gbps | 32 | 64 |
XX large | 10 TB and higher | 10 - 40 Gbps | 64 | 128 |
Boundaries of NFS throughput are defined by 2 parameters:
Disk throughput (throttling) - real speed is usually 10% less than defined due to NFS protocol behavior
Network throughput - real speed is usually 30% less than defined due to TCP protocol implementation
The NFS throughput is defined by lower value either of parameters
Examples
Examples of expected NFS throughput (NFS read/write speed) by different settings:
Given: | Expected: | |||
Network | Disk throughput | IOPS | NFS version | NFS throughput (NFS read/write speed) |
1 Gbps | 125 MB/s | 2000 | 3 or higher | 100 - 120 MB/s |
5 Gbps | 600 MB/s | 4000 | 3 or higher | 500 - 600 MB/s |
10 Gbps | 1000 MB/s | 4000 | 4,1 | 800 - 1000 MB/s |
Equation:
MIN("DISK THROUGHPUT", "NETWORK BANDWIDTH") - 30 PERCENT
e.g
Netwokr = 10 Gbps = 1.25 GB/s
Disk throughput = 1 GB/s
Then expected NFS throughput will be
min(1.25, 1) = 1 GB/s - 30 percent ~ 800 MB/s,
we can expect sometimes the pick can be up to 1000 MB/s
The system requirements for the NFS server can vary based on several factors such as the number of concurrent sessions and the volume of data that has to be moved. Here are some of the factors to be considered while configuring the NFS server and client to maximize performance.
Network traffic must be well-balanced across client networks, and the networks themselves must never be overloaded.
Ensure that there is sufficient disk bandwidth and that it is not driven at more than 60 percent of its random I/O capacity to minimize the chances of bottlenecks.
Ensure that the percent system time of the CPU does not exceed 50% for optimal NFS performance.
Use the formula, Virtual memory = RAM (main memory) + swap space to calculate the memory requirements depending on the type of workload deployed on the server.