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From "Mei Wan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MESOS-2971) Implement OverlayFS based provisioner backend
Date Thu, 27 Aug 2015 20:55:45 GMT

    [ https://issues.apache.org/jira/browse/MESOS-2971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14717508#comment-14717508
] 

Mei Wan commented on MESOS-2971:
--------------------------------

I've implemented the logic for overlayfs and posted it on review board here (https://reviews.apache.org/r/37853/).
I mounted the overlay filesystem with multiple lower layer images, which means an upperdir
and workdir are not necessary. It also means this is mounted as read-only. I tested it manually
by creating random files and running a master, slave, and executor with my own executorinfo.

> Implement OverlayFS based provisioner backend
> ---------------------------------------------
>
>                 Key: MESOS-2971
>                 URL: https://issues.apache.org/jira/browse/MESOS-2971
>             Project: Mesos
>          Issue Type: Improvement
>            Reporter: Timothy Chen
>            Assignee: Mei Wan
>              Labels: mesosphere
>
> Part of the image provisioning process is to call a backend to create a root filesystem
based on the image on disk layout.
> The problem with the copy backend is that it's both waste of IO and space, and bind only
can deal with one layer.
> Overlayfs backend allows us to utilize the filesystem to merge multiple filesystems into
one efficiently.



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