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-utils first.
-
On macOS, install via Homebrew:
$ brew cask install osxfuse
$ brew install goofys
- Or build from source with Go 1.9 or later:
$ 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 0 0
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 m4.16xlarge in us-west-2a
connected to a bucket in us-west-2. Units are seconds.
(โ ) riofs does not wait for HTTP response before returning from release()
, so the create files benchmarks do not measure the right thing for it
Enabling --cache
has little impact on write speed (since catfs
implements a write-through cache) but read has a large variance. Time
to first byte is competitive with s3fs
which suggests layering fuse
filesystems can be a viable approach.
$ cat > ~/.passwd-riofs
export AWS_ACCESS_KEY_ID=AKID1234567890
export AWS_SECRET_ACCESS_KEY=MY-SECRET-KEY
$ sudo docker run -e BUCKET=$TESTBUCKET -e CACHE=false --rm --privileged --net=host -v ~/.passwd-riofs:/root/.passwd-riofs -v /tmp/cache:/tmp/cache kahing/goofys-bench
# result will be written to $TESTBUCKET
if CACHE
is set to true
, the read benchmarks ('Read 1GB' and 'Time to 1st byte') will be cached read.
Copyright (C) 2015 - 2018 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:
- only sequential writes supported
- does not store file mode/owner/group
- use
--(dir|file)-mode
or--(uid|gid)
options
- use
- does not support symlink or hardlink
ctime
,atime
is always the same asmtime
- cannot rename non-empty directories
unlink
returns success even if file is not presentfsync
is ignored, files are only flushed onclose
In addition to the items above, the following are supportable but not yet implemented:
- creating files larger than 1TB
goofys has been tested with the following non-AWS providers:
- Amplidata
- Ceph (ex: Digital Ocean Spaces, DreamObjects, gridscale)
- EMC Atmos
- Google Cloud Storage
- OpenStack Swift
- S3Proxy
- Minio (limited)
- Wasabi
- Data is stored on Amazon S3
- Amazon SDK for Go
- Other related fuse filesystems
- catfs: caching layer that can be used with goofys
- s3fs: another popular filesystem for S3
- gcsfuse: filesystem for Google Cloud Storage. Goofys borrowed some skeleton code from this project.
- S3Proxy is used for
go test
- fuse binding, also used by
gcsfuse