S3FS

S3FS is a library built on top of botocore that allows you to mount Akave storage as a local file system while preserving the native object format for files.

The s3fs-fuse driver is a user-space file system that provides a virtual file system interface to S3-compatible storage. It allows you to access your Akave storage as a local file system, making it easy to work with your data as if it were stored on your local machine.

Prerequisites

• Akave Cloud Credentials
  These can be requested by contacting Akave at Akave Cloud Contact.

• Install dependencies (Requirements: Python 3.9+, pip, s3fs)

Installation

Pip Installation Instructions

Pip comes pre-installed with Python 3.4 and later. If you don’t already have Python installed, you can download it from https://www.python.org/downloads/.

You can verify that pip is installed by running the following command:

pip --version

S3FS Installation Instructions

The simplest way to install the S3FS library is to use pip:

pip install s3fs

Run the following command to verify installation:

pip show s3fs

S3FS Fuse Installation Instructions

MacOS

macOS 10.12 and newer via Homebrew:

brew install --cask macfuse
brew install gromgit/fuse/s3fs-mac

Linux

Debian 9 and Ubuntu 16.04 or newer:

sudo apt install s3fs

Authentication

Before using S3FS with Akave, you need to configure authentication. There are several ways to do this, for this guide we’ll focus on those that use the default AWS CLI profile functionality.

For more information on using the AWS CLI with Akave O3 see the documentation on setup.

For other authentication methods see the S3FS Fuse Github.

Option 1: Credentials File

Create or edit ~/.aws/credentials and add your Akave credentials:

[akave-o3]
aws_access_key_id = your_access_key_id
aws_secret_access_key = your_secret_access_key
endpoint_url = https://o3-rc2.akave.xyz

Option 2: AWS CLI

Run the below command and follow the prompts to add your access key, secret key, and region.

aws configure --profile akave-o3

• AWS Access Key ID: <your_access_key>
• AWS Secret Access Key: <your_secret_key>
• Default region name: akave-network
• Default output format: json

Usage

CLI (s3fs-fuse)

Mounting an Akave Bucket

Create a directory to mount your bucket

mkdir -p ~/akave-mount

Mount the bucket

s3fs your-bucket-name ~/akave-mount \
  -o url=https://o3-rc2.akave.xyz \
  -o profile=akave-o3

Check active mounts

mount | grep s3fs

Unmount when done

umount ~/akave-mount

Additional mounting options

Enable Debugging

-o dbglevel=info -f

The -f flag is used to run s3fs in foreground mode, which is useful for debugging.

To modify the verbosity of the output, use dbglevel= followed by one of the following:

• debug
• warn
• info
• err

Use Cache

-o use_cache=/path/to/cache

Specifies a directory to use for caching files.

Parallel Upload

-o parallel_count=1       

Controls the number of parallel upload threads.

Multi-Request Maximum

-o multireq_max=1

Controls the maximum number of requests that can be made in parallel.

Basic Operations

Once mounted, you can use standard file system commands:

List files in bucket with their sizes

ls -l ~/akave-mount

Copy a local file to the bucket

cp myfile.txt ~/akave-mount/

Download a file from the bucket

cp ~/akave-mount/myfile.txt ./

Delete a file from the bucket

rm ~/akave-mount/myfile.txt

S3FS Specific Operations

Edit a file in place

nano ~/akave-mount/notes/todo.txt

View S3FS Logs

On MacOS:

log show --predicate 'process == "s3fs"' --last 1h

On Linux:

journalctl -t s3fs --since "1 hour ago"

Python

The S3FS Python library provides a powerful interface to work with Akave O3 storage programmatically. Below are examples of common operations and best practices.

Imports

To use S3FS in Python, you need to import the s3fs module:

import s3fs

Some other imports that are helpful are OS for environment variables and pandas for data analysis.

import os
import pandas as pd

Authentication Options

The below sections outline different ways to securely authenticate with Akave O3 storage using S3FS.

Using Environment Variables

Environment variables are a secure way to handle credentials. You can load them directly by exporting them in your shell:

export AKAVE_ACCESS_KEY=your_access_key_here
export AKAVE_SECRET_KEY=your_secret_key_here

Then in your Python code you can reference the credentials:

import os

access_key = os.environ.get("AKAVE_ACCESS_KEY")
secret_key = os.environ.get("AKAVE_SECRET_KEY")

fs = s3fs.S3FileSystem(
    key=access_key,
    secret=secret_key,
    endpoint_url="https://o3-rc2.akave.xyz",
    client_kwargs={"region_name": "akave-network"}
)

Using .env Files

For development environments, you can use .env files with python-dotenv:

Example .env file:

AKAVE_ACCESS_KEY=your_access_key_here
AKAVE_SECRET_KEY=your_secret_key_here

Then in your Python code you can load the credentials from the .env file:

import os
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()

fs = s3fs.S3FileSystem(
    key=os.environ.get("AKAVE_ACCESS_KEY"),
    secret=os.environ.get("AKAVE_SECRET_KEY"),
    endpoint_url="https://o3-rc2.akave.xyz",
    client_kwargs={"region_name": "akave-network"}
)

Using AWS CLI Profile

You may also use AWS CLI profiles, where credentials are stored in your system’s credential store:

fs = s3fs.S3FileSystem(
    profile="akave-o3",
    endpoint_url="https://o3-rc2.akave.xyz",
    client_kwargs={"region_name": "akave-network"}
)

Basic Operations

List buckets

buckets = fs.ls("")
print(f"Available buckets: {buckets}")

List files in a bucket

files = fs.ls("your-bucket-name")
for file in files:
    print(file)

Create a directory

fs.mkdir("your-bucket-name/new-directory")

Upload a file

fs.put("local-file.txt", "your-bucket-name/remote-file.txt")

Upload a large file with progress tracking

with fs.open("your-bucket-name/large-file.zip", "wb") as remote_file:
    with open("local-large-file.zip", "rb") as local_file:
        remote_file.write(local_file.read())
        print("Upload complete!")

Download a file

fs.get("your-bucket-name/remote-file.txt", "downloaded-file.txt")

Download a large file in chunks

with fs.open("your-bucket-name/large-file.csv", "rb") as remote_file:
    # Process the file in chunks to avoid loading it all into memory
    chunk_size = 1024 * 1024  # 1 MB chunks
    while True:
        chunk = remote_file.read(chunk_size)
        if not chunk:
            break
        # Process chunk here

Delete a file

fs.rm("your-bucket-name/file-to-delete.txt")

Delete multiple files

fs.rm(["your-bucket-name/file1.txt", "your-bucket-name/file2.txt"])

Delete a directory and all its contents recursively

fs.rm("your-bucket-name/directory-to-delete", recursive=True)

Working with Pandas

S3FS integrates well with pandas for data analysis workflows:

Read CSV directly from Akave storage

df = pd.read_csv(fs.open("your-bucket-name/data.csv"))

Write DataFrame back to Akave storage as CSV

df.to_csv(fs.open("your-bucket-name/processed-data.csv", "w"))

Read parquet files directly from Akave storage

df = pd.read_parquet(fs.open("your-bucket-name/data.parquet"))

Write DataFrame back to Akave storage as parquet

df.to_parquet(fs.open("your-bucket-name/processed-data.parquet", "wb"))

Advanced Operations

Get file metadata and info

info = fs.info("your-bucket-name/myfile.txt")
print(f"File size: {info['size']} bytes")
print(f"Last modified: {info['LastModified']}")

Copy objects within storage

fs.copy("your-bucket-name/source.txt", "your-bucket-name/destination.txt")

Error Handling and Best Practices

Error handling

Use try/except blocks to handle errors by checking the error code and handling it accordingly.

import botocore.exceptions

try:
    # Attempt to access a file
    with fs.open("your-bucket-name/may-not-exist.txt", "rb") as f:
        content = f.read()
except botocore.exceptions.ClientError as e:
    if e.response["Error"]["Code"] == "NoSuchKey":
        print("The file does not exist")
    elif e.response["Error"]["Code"] == "AccessDenied":
        print("Access denied - check permissions")
    else:
        print(f"Error occurred: {e}")

Batch operations for better performance

Use batch operations to upload multiple files at once for better performance.

files_to_upload = [
    ("local1.txt", "your-bucket-name/remote1.txt"),
    ("local2.txt", "your-bucket-name/remote2.txt"),
    ("local3.txt", "your-bucket-name/remote3.txt")
]

for local, remote in files_to_upload:
    fs.put(local, remote)

Connection pooling for multiple operations

Use the same S3FileSystem instance for multiple operations to benefit from connection pooling by setting the max_pool_connections parameter.

fs = s3fs.S3FileSystem(
    profile="akave-o3",
    endpoint_url="https://o3-rc2.akave.xyz",
    config_kwargs={"max_pool_connections": 20}
)

Caching configuration

Enable client-side caching to reduce the number of requests made to Akave storage by setting the use_listings_cache and listings_expiry_time parameters.

fs = s3fs.S3FileSystem(
    profile="akave-o3",
    endpoint_url="https://o3-rc2.akave.xyz",
    use_listings_cache=True,
    listings_expiry_time=300  # Cache TTL in seconds
)

Example Python Script

A comprehensive example script demonstrating all S3FS operations with Akave O3 is available at:

s3fs_test.py

This script includes:

• Bucket operations: List buckets and their contents
• File operations: Upload, download, delete, and copy files
• Directory operations: Create directories and manage folder structures
• Pandas integration: Read and write DataFrames directly to/from Akave storage
• Error handling: Robust error handling patterns
• CLI interface: Command-line arguments for flexible testing

Dependencies

Required packages (install via pip):

• s3fs: Python library for S3-compatible object storage file system operations
• pandas: Data analysis library for working with DataFrames and structured data

Standard library modules (included with Python):

• os: Operating system interface for file operations
• datetime: Date and time handling
• argparse: Command-line argument parsing

Install dependencies:

pip install s3fs pandas

Usage examples

You can run the script with the following commands to run all tests or test specific operations with variable bucket and file names.

Run all tests on a bucket:

python s3fs_test.py my-bucket

List buckets and contents:

python s3fs_test.py my-bucket --operation list

Upload a specific file:

python s3fs_test.py my-bucket --operation upload --file data.csv

Download a specific file:

python s3fs_test.py my-bucket --operation download --file data.csv

Delete a specific file:

python s3fs_test.py my-bucket --operation delete --file data.csv

Note: The script uses the AWS CLI profile akave-o3 by default. Modify the create_s3fs_client() function to use your configured profile name (e.g., akave-o3) or to use environment variables for authentication using the key and secret parameters described in the Authentication section above