Goofys is a high-performance, POSIX-ish Amazon S3 file system written in Go
Goofys allows you to mount an S3 bucket as a filey system.
It's a Filey System instead of a File System because goofys strives for performance first and POSIX second. Particularly things that are difficult to support on S3 or would translate into more than one round-trip would either fail (random writes) or faked (no per-file permission). Goofys does not have an on disk data cache (checkout catfs), and consistency model is close-to-open.
On Linux, install via pre-built binaries. You may also need to install fuse too if you want to mount it on startup.
On macOS, install via Homebrew:
$ brew cask install osxfuse
$ brew install goofys
$ export GOPATH=$HOME/work
$ go get github.com/kahing/goofys
$ go install github.com/kahing/goofys
$ cat ~/.aws/credentials
[default]
aws_access_key_id = AKID1234567890
aws_secret_access_key = MY-SECRET-KEY
$ $GOPATH/bin/goofys <bucket> <mountpoint>
$ $GOPATH/bin/goofys <bucket:prefix> <mountpoint> # if you only want to mount objects under a prefix
Users can also configure credentials via the AWS CLI or the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables.
To mount an S3 bucket on startup, make sure the credential is configured for root, and can add this to /etc/fstab:
goofys#bucket /mnt/mountpoint fuse _netdev,allow_other,--file-mode=0666,--dir-mode=0777 0 0
See also: Instruction for Azure Blob Storage, Azure Data Lake Gen1, and Azure Data Lake Gen2.
Got more questions? Check out questions other people asked
Using --stat-cache-ttl 1s --type-cache-ttl 1s for goofys -ostat_cache_expire=1 for s3fs to simulate cold runs. Detail for the benchmark can be found in bench.sh. Raw data is available as well. The test was run on an EC2 m5.4xlarge in us-west-2a connected to a bucket in us-west-2. Units are seconds.
To run the benchmark, configure EC2's instance role to be able to write to $TESTBUCKET, and then do:
$ sudo docker run -e BUCKET=$TESTBUCKET -e CACHE=false --rm --privileged --net=host -v /tmp/cache:/tmp/cache kahing/goofys-bench
# result will be written to $TESTBUCKET
See also: cached benchmark result and result on Azure.
Copyright (C) 2015 - 2019 Ka-Hing Cheung
Licensed under the Apache License, Version 2.0
goofys has been tested under Linux and macOS.
List of non-POSIX behaviors/limitations:
--(dir|file)-mode or --(uid|gid) optionsctime, atime is always the same as mtimerename directories with more than 1000 childrenunlink returns success even if file is not presentfsync is ignored, files are only flushed on closegoofys has been tested with the following non-AWS S3 providers:
Additionally, goofys also works with the following non-S3 object stores:
go testgcsfuse