This page describes the expected average performance and the recommended performance settings for Filestore. It also shows you how you can test the performance of your Filestore instances.

Expected performance

Each Filestore service tier provides a different level of performance. The Basic tiers offer consistent performance beyond a 10 TB instance capacity. For High Scale tier instances, performance grows or shrinks linearly as the capacity scales up or down.

The performance of any given instance may vary from the reported numbers due to a variety of factors, such as the use of caching on the client or server, the Compute Engine machine type used for the client VM instance, and the workload being tested.

The following tables show the expected performance of Filestore instances based on its service tier and configured capacity:

Performance Capacity (TB) Read/Write IOPS Read/Write Tput (MB/s)
BASIC_HDD 1-10 600/1,000 100/100
BASIC_HDD 10-63.9 1,000/5,000 180/120
BASIC_SSD 2.5-63.9 60,000/25,000 1,200/350
HIGH_SCALE_SSD 60 90,000/30,000 3,000/660
HIGH_SCALE_SSD 320 480,000/160,000 16,000/3,520

High Scale SSD tier performance scaling and per client performance

The performance of High Scale tier instances scales linearly with the allocated capacity in 10 TB steps. The following table shows the amount of performance gained with each 10 TB of capacity.

Specification Maximum sustained IOPS1 Maximum sustained Tput2 (MB/s)
Read per 10TB 15,000 500
Write per 10TB 5,000 110

These performance numbers also correspond to the performance cap per client for each instance. For example, even though a High Scale tier instance with 60 TB of capacity has a total maximum sustained read/write throughput of 3,000/660 MB/s, the maximum throughput achievable per client is 500/110 MB/s. There is no per-client performance cap for Basic tier instances.

Recommended client machine type

We recommend having a Compute Engine machine type of n1-standard-8 or better for the client VM instance. This allows the client to achieve approximately 16 Gbps read bandwidth for cache-friendly workloads.

Linux client mount options

We recommend using the default NFS mount options, especially using a hard mount, async, and having the rsize and wsize options set to 1 MB, to achieve the best performance on Linux client VM instances. For more information on NFS mount options, see nfs.

Click to expand - Default NFS mount options

Default option Description
hard The NFS client retries NFS requests indefinitely.
timeo=600 The NFS client waits 600 deciseconds (60 seconds) before retrying an NFS request.
retrans=3 The NFS client attempts NFS requests three times before taking further recovery action.
rsize=1048576 The NFS client can receive a maximum of 1048576 bytes (1 MiB) from the NFS server per READ request.
wsize=1048576 The NFS client can receive a maximum of 1048576 bytes (1 MiB) from the NFS server per WRITE request.
resvport The NFS client uses a privileged source port when communicating with the NFS server for this mount point.
async The NFS client delays sending application writes to the NFS server until certain conditions are met.
Caution: Using the sync option significantly reduces performance.

Testing performance

If you are using Linux, you can use the fio tool to benchmark read and write throughput and IOPS for Basic tier instances. The examples in this section show common benchmarks you might want to run. You may need to run fio from multiple client VM instances to achieve maximum performance. This method for benchmarking performance will not provide accurate results for High Scale tier instances.

The following example benchmarks maximum write throughput:

fio --ioengine=sync --direct=0 \
--fsync_on_close=1 --randrepeat=0 --nrfiles=1  --name=seqwrite --rw=write \
--bs=1m --size=20G --end_fsync=1 --fallocate=none  --overwrite=0 --numjobs=1 \
--directory=/mnt/gcfs --loops=10

The following example benchmarks maximum write IOPS:

fio --ioengine=sync --direct=0 \
--fsync_on_close=1 --randrepeat=0 --nrfiles=1  --name=randwrite --rw=randwrite \
--bs=4K --size=1G --end_fsync=1 --fallocate=none  --overwrite=0 --numjobs=80 \
--sync=1 --directory=/mnt/standard --loops=10

The following example benchmarks maximum read throughput:

fio --ioengine=sync --direct=0 \
--fsync_on_close=1 --randrepeat=0 --nrfiles=1  --name=seqread --rw=read \
--bs=1m --size=240G --end_fsync=1 --fallocate=none  --overwrite=0 --numjobs=1 \
--directory=/mnt/ssd --invalidate=1 --loops=10

The following example benchmarks maximum read IOPS:

fio --ioengine=sync --direct=0 \
--fsync_on_close=1 --randrepeat=0 --nrfiles=1  --name=randread --rw=randread \
--bs=4K --size=1G --end_fsync=1 --fallocate=none  --overwrite=0 --numjobs=20 \
--sync=1 --invalidate=1 --directory=/mnt/standard  --loops=10

  1. Numbers are measured based on 4K reads/writes IO. 

  2. Numbers are measured based on 1M reads/writes IO.