Quick Start Guide
The simplest way to quickly try out Alluxio is to install it locally on a single machine. In this quick start guide, we will install Alluxio on your local machine, mount example data, and perform basic tasks with the data in Alluxio. During this guide, you will:
- Download and configure Alluxio
- Start Alluxio locally
- Perform basic tasks via Alluxio Shell
- [Bonus] Mount a public Amazon S3 bucket in Alluxio
- Shutdown Alluxio
[Bonus] If you have an AWS account with an access key id and secret access key, you will be able to perform additional tasks in this guide. Sections of the guide which require your AWS account information will be labeled with [Bonus].
Note This guide is meant for you to quickly start interacting with an Alluxio system. Alluxio performs best in a distributed environment for big data workloads. Both of these qualities are difficult to incorporate in a local environment. If you are interested in running a larger scale example which highlights the performance benefits of Alluxio, try out the instructions in either of these two whitepapers: Accelerating on-demand data analytics with Alluxio, Accelerating data analytics on ceph object storage with Alluxio.
For the following quick start guide, you will need:
- Mac OS X or Linux
- Java 7 or newer
- [Bonus] AWS account and keys
Setup SSH (Mac OS X)
If you are using Mac OS X, you may have to enable the ability to ssh into localhost. To enable remote login, Open System Preferences, then open Sharing. Make sure Remote Login is enabled.
Next, you can unpack the download with the following commands. Your filename may be different depending on which pre-built binaries you have downloaded.
tar -xzf alluxio-1.4.0-bin.tar.gz cd alluxio-1.4.0
This will create a directory
alluxio-1.4.0 with all of the Alluxio
source files and Java binaries.
Before we start Alluxio, we have to configure it. We will be using most of the default settings.
conf/alluxio-env.sh configuration file from the template. You can create the config
file with the following command:
./bin/alluxio bootstrapConf localhost
[Bonus] Configuration for AWS
If you have an Amazon AWS account with your access key id and secret key, you can update your
Alluxio configuration now in preparation for interacting with Amazon S3 later in this guide. Add
your AWS access information to the Alluxio configuration by adding the keys to the
conf/alluxio-site.properties file. The following commands will update the configuration.
echo "aws.accessKeyId=AWS_ACCESS_KEY_ID" >> conf/alluxio-site.properties echo "aws.secretKey=AWS_SECRET_ACCESS_KEY" >> conf/alluxio-site.properties
You will have to replace AWS_ACCESS_KEY_ID with your AWS access key id, and AWS_SECRET_ACCESS_KEY with your AWS secret access key. Now, Alluxio is fully configured for the rest of this guide.
Next, we will format Alluxio in preparation for starting Alluxio. The following command will format the Alluxio journal and the worker storage directory in preparation for the master and worker to start.
Now, we can start Alluxio! By default, Alluxio is configured to start a master and worker on the localhost. We can start Alluxio on localhost with the following command:
Using the Alluxio Shell
Now that Alluxio is running, we can examine the Alluxio file system with the Alluxio shell. The Alluxio shell enables many command-line operations for interacting with Alluxio. You can invoke the Alluxio shell with the following command:
This will print out the available Alluxio command-line operations.
For example, you can list files in Alluxio with the
ls command. To list all files in the root directory, use the following command:
./bin/alluxio fs ls /
Unfortunately, we do not have any files in Alluxio. We can solve that by copying a file into
copyFromLocal shell command is used to copy a local file into Alluxio.
./bin/alluxio fs copyFromLocal LICENSE /LICENSE Copied LICENSE to /LICENSE
After copying the
LICENSE file, we should be able to see it in Alluxio. List the files in
Alluxio with the command:
./bin/alluxio fs ls / 26.22KB 06-20-2016 11:30:04:415 In Memory /LICENSE
The output shows the file that exists in Alluxio, as well as some other useful information, like the size of the file, the date it was created, and the in-memory status of the file.
You can also view the contents of the file through the Alluxio shell. The
cat command will print
the contents of the file.
./bin/alluxio fs cat /LICENSE Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION ...
With the default configuration, Alluxio uses the local file system as its UnderFileSystem (UFS). The
default path for the UFS is
./underFSStorage. We can see what is in the UFS with:
However, the directory doesn’t exist! By default, Alluxio will write data only into Alluxio space, not to the UFS.
However, we can tell Alluxio to persist the file from Alluxio space to the UFS. The shell command
persist will do just that.
./bin/alluxio fs persist /LICENSE persisted file /LICENSE with size 26847
Now, if we examine the local UFS again, the file should appear.
ls ./underFSStorage LICENSE
If we browse the Alluxio file system in the master’s web UI we can see the LICENSE file as well as other useful information. Here, the Persistence State column shows the file as PERSISTED.
[Bonus] Mounting in Alluxio
Alluxio unifies access to storage systems with the unified namespace feature. Read the Unified Namespace blog post and the unified namespace documentation for more detailed explanations of the feature.
This feature allows users to mount different storage systems into the Alluxio namespace and access the files across various storage systems through the Alluxio namespace seamlessly.
First, we will create a directory in Alluxio to store our mount points.
./bin/alluxio fs mkdir /mnt Successfully created directory /mnt
Next, we will mount an existing sample S3 bucket to Alluxio. We have provided a sample S3 bucket for you to use in the rest of this guide.
./bin/alluxio fs mount -readonly alluxio://localhost:19998/mnt/s3 s3a://alluxio-quick-start/data Mounted s3a://alluxio-quick-start/data at alluxio://localhost:19998/mnt/s3
Now, the S3 bucket is mounted into the Alluxio namespace.
We can list the files from S3, through the Alluxio namespace. We can use the familiar
command to list the files from the S3 mounted directory.
./bin/alluxio fs ls /mnt/s3 87.86KB 06-20-2016 12:50:51:660 Not In Memory /mnt/s3/sample_tweets_100k.csv 933.21KB 06-20-2016 12:50:53:633 Not In Memory /mnt/s3/sample_tweets_1m.csv 149.77MB 06-20-2016 12:50:55:473 Not In Memory /mnt/s3/sample_tweets_150m.csv 9.61MB 06-20-2016 12:50:55:821 Not In Memory /mnt/s3/sample_tweets_10m.csv
We can see the newly mounted files and directories in the Alluxio web UI as well.
With Alluxio’s unified namespace, you can interact with data from different storage systems
seamlessly. For example, with the
ls shell command, you can recursively list all the files that
exist under a directory.
./bin/alluxio fs ls -R / 26.22KB 06-20-2016 11:30:04:415 In Memory /LICENSE 1.00B 06-20-2016 12:28:39:176 /mnt 4.00B 06-20-2016 12:30:41:986 /mnt/s3 87.86KB 06-20-2016 12:50:51:660 Not In Memory /mnt/s3/sample_tweets_100k.csv 933.21KB 06-20-2016 12:50:53:633 Not In Memory /mnt/s3/sample_tweets_1m.csv 149.77MB 06-20-2016 12:50:55:473 Not In Memory /mnt/s3/sample_tweets_150m.csv 9.61MB 06-20-2016 12:50:55:821 Not In Memory /mnt/s3/sample_tweets_10m.csv
This shows all the files under the root of the Alluxio file system, from all of the mounted storage
/LICENSE file is in your local file system, while the files under
/mnt/s3/ are in
[Bonus] Accelerating Data Access with Alluxio
Since Alluxio leverages memory to store data, it can accelerate access to data. First, let’s take a look at the status of a file in Alluxio (mounted from S3).
./bin/alluxio fs ls /mnt/s3/sample_tweets_150m.csv 149.77MB 06-20-2016 12:50:55:473 Not In Memory /mnt/s3/sample_tweets_150m.csv
The output shows that the file is Not In Memory. This file is a sample of tweets. Let’s see how many tweets mention the word “kitten”. With the following command, we can count the number of tweets with “kitten”.
time ./bin/alluxio fs cat /mnt/s3/sample_tweets_150m.csv | grep -c kitten 889 real 0m22.857s user 0m7.557s sys 0m1.181s
Depending on your network connection, the operation may take over 20 seconds. If reading this file takes too long, you may use a smaller dataset. The other files in the directory are smaller subsets of this file.
Now, let’s see how many tweets mention the word “puppy”.
time ./bin/alluxio fs cat /mnt/s3/sample_tweets_150m.csv | grep -c puppy 1553 real 0m25.998s user 0m6.828s sys 0m1.048s
As you can see, it takes a lot of time to access the data for each command. Alluxio can accelerate
access to this data by using memory to store the data. However, the
cat shell command does not
cache data in Alluxio memory. There is a separate shell command,
load, which tells
Alluxio to store the data in memory. You can tell Alluxio to load the data into memory with the
./bin/alluxio fs load /mnt/s3/sample_tweets_150m.csv
After loading the file, you can check the status with the ls command:
./bin/alluxio fs ls /mnt/s3/sample_tweets_150m.csv 149.77MB 06-20-2016 12:50:55:473 In Memory /mnt/s3/sample_tweets_150m.csv
The output shows that the file is now In Memory. Now that the file is memory, reading the file should be much faster now.
Let’s count the number of tweets with the word “puppy”.
time ./bin/alluxio fs cat /mnt/s3/sample_tweets_150m.csv | grep -c puppy 1553 real 0m1.917s user 0m2.306s sys 0m0.243s
As you can see, reading the file was very quick, only a few seconds! And, since the data in Alluxio memory, you can easily read the file again just as quickly. Let’s now count how many tweets mention the word “bunny”.
time ./bin/alluxio fs cat /mnt/s3/sample_tweets_150m.csv | grep -c bunny 907 real 0m1.983s user 0m2.362s sys 0m0.240s
Congratulations! You installed Alluxio locally and used Alluxio to accelerate access to data!
Once you are done with interacting with your local Alluxio installation, you can stop Alluxio with the following command:
Congratulations on completing the quick start guide for Alluxio! You have successfully downloaded and installed Alluxio on your local computer, and performed some basic interactions via the Alluxio shell. This was a simple example on how to get started with Alluxio.
There are several next steps available. You can learn more about the various features of Alluxio in our documentation. You can also deploy Alluxio in your environment, mount your existing storage systems to Alluxio, or configure your applications to work with Alluxio. Additional resources are below.
Alluxio can be deployed in many different environments.
- Alluxio on Local Machine
- Alluxio on Virtual Box
- Alluxio Standalone on a Cluster
- Alluxio Standalone with Fault Tolerance
- Alluxio on EC2
- Alluxio on GCE
- Alluxio with Mesos on EC2
- Alluxio with Fault Tolerance on EC2
- Alluxio with YARN on EC2
Under Storage Systems
There are many Under storage systems that can be accessed through Alluxio.
- Alluxio with GCS
- Alluxio with S3
- Alluxio with Swift
- Alluxio with GlusterFS
- Alluxio with HDFS
- Alluxio with MapR-FS
- Alluxio with Secure HDFS
- Alluxio with OSS
- Alluxio with NFS
Frameworks and Applications
Different frameworks and applications work with Alluxio.