# Transferring data from MGHPCC to Unity:

## This guide will allow you to transfer data from the MGHPCC to Unity via Globus.

### Step 1: Log in to Globus

* Visit this site: https://app.globus.org/file-manager
* Use your UMass credentials to log in

### Step 2: Connect to the MGHPCC and Unity
* Select the **File Manager** tab from lefthand pane
* In the two "Collection" boxes, select the MGHPCC and Unity via their Globus identities
* The MGHPCC is ghpcc#ghpcc07
* Unity is Unity
* *more technical identifier: acda5457-9c06-4564-8375-260ba428f22a*
* If you start typing either in the "Collection" text box, the dropdown will update and allow you to select the appropriate "Collection" (aka cluster)
* Provide your login credentials for each cluster
* Once you're finished logging in to each connection, the screen should look something like this: 

### Step 3: Transfer files
* Below, the Connection and Path text boxes, you should see the contents of each directory.
* Navigate to the location of the file/directory you'd like to transfer from and to.
* Select the file/directory you'd like to transfer
* Click on the "Transfer or Sync to..." button. Shown in the middle here: 
* Finally, slick the Start button on the side where you're transferring the data from.
* Voila! The file/directory will be queued up and transferred shortly!

### Step 4: Confirm that transfer was successful
* You'll receive an email once the transfer occurs.
* Open the Destination directory and confirm that the file was transferred as expected.

## This guide will allow you to send data from the MGHPCC to the Unity server using `scp` for the purposes of transitioning.
#### Notes:
* You will need to have set up an acount on the Unity server.
* You will need your password for the MGHPCC server (unless you are using private/public keys for logging on to this too).

### Step 1.
* Log in to the MGHPCC.
* While logged into the MGHPCC, from your home directory, run `ssh-keygen -t rsa`
* This will generate a private/public key pair which is unique to each user.
* The generator will ask you to save the keys as a specific name, and you have the option to associate a password to the keys (recommended but not required).
* Two files will be created: NAME and NAME.pub
* NAME.pub is the public key that you will need for Step 2.

### Step 2.
* Log in to the Unity cluster portal: https://unity.rc.umass.edu/
* Navigate to "Account Settings"
* You will see the SSH keys that are currently linked to your account
* Click the "+" button to add the MGHPCC key to your account.
* Copy the entire contents of the public key (NAME.pub) from the MGHPCC generated in Step 1 into the prompt.
* Click "add key"
* Click "Set Login Shell"
* This will now link the two servers, allowing them to communicate

### Step 3.
* Log into the Unity cluster
* Create a file to test the connection between servers (e.g. `touch test.txt`)
* Attempt to transfer the file from Unity to the MGHPCC:
* `scp test.txt [e-mail]:/home/username/`
* You will be prompted for your password to the MGHPCC - enter it here.
* If configured properly, this file should transfer immediately to the specficied destination path (in this case `/home/username/`)

### Step 4.
* Assuming that Step 3 worked and the file transferred across from Unity to the MGHPCC, you can use this to pull data across:
`scp [e-mail]:/where/files/are/you/want/* ./destination/`
* Each time you run `scp` in this way, you will be prompted for your password.
* **Note** that currently this only works when **logged in and running commands from Unity, not the MGHPCC.**