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# Large scale Home Directories migration:<br />from DFS to CERNBox
###### CS3 Copenhagen 27/01/2020
##### Apostolos Smyrnakis - CERN IT
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# Overview
* What do we migrate and for whom?
* Number of users / current status
* Migration outline
* Experiences / Challenges
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## What do we migrate and for whom?
<br />
* Users' home profiles *[1]* from Distributed File System (DFS)<br />to CERNBox.
* All CERN accounts will be migrated!
* 37000 accounts
<br />
<br />
***[1] Home profile:** Desktop, Documents, Music, Pictures, Videos, Favorites, ++*
<!-- Primary accounts 38442 -->
<!-- Secondary accounts 11150 -->
<!-- Service accounts 7020 -->
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## Large scale? CERN scale!
<br />
* ~ 5000 accounts per month
* ~ newcomers by-default
<!--  -->
<!-- <img src="https://codimd.web.cern.ch/uploads/upload_a52ed72ab2df4e3e26fe4dc211e75e29.png" class="plain" style="border:0;background: none !important;box-shadow:0 0 0"/> -->
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## Current status
<br />
##### > 3900 accounts
<!-- <br />*(was 400 in October 2019* :smiley:) -->
|  |  |
| -------- | -------- |
<!--
|  |  |
| -------- | -------- |
-->
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## Migration outline (1/3)
###### <span>Pre-migration checks<!-- .element: class="fragment" data-fragment-index="1" --></span>
<span> - Quota check<!-- .element: class="fragment" data-fragment-index="2" --></span>
<span> - Files / folders clashes<!-- .element: class="fragment" data-fragment-index="3" --></span>
###### <span>Communication with the user<!-- .element: class="fragment" data-fragment-index="4" --></span>
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## Migration outline (2/3)
###### :last_quarter_moon_with_face: Overnight data copy / User's DFS lock
<!-- approx 15m / user -->
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## Migration outline (3/3)
###### :sunny: Logon script
<!-- <img src="https://codimd.web.cern.ch/uploads/upload_72b6b162ea0aed1a68f94dc892592d05.jpg" class="plain" style="border:5;background: none !important;box-shadow:0 0 0;vertical-align: 450% !important"/> -->
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## Experiences / Challenges
* General CERNBox usage
* Combination of *local* with *remote* directories
* Ensure logon script's execution
* Existing client's configurations
* Users not understanding the new **folder sctructure**
* Files' source / destination
* Recent shortcuts
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# Thank you
<br />
##### Apostolos Smyrnakis - CERN IT
##### apostolos.smyrnakis@cern.ch
<br />
###### CS3 Copenhagen 27/01/2020
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