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Questions tagged [aufs]

AUFS is an advanced multi layered unification filesystem.

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6 views

Interpreting AUFS mounts

My question is the opposite of most on AUFS. I don't need to know how to mount two or more directories in a union. Instead I need to understand what I am seeing on an existing system. / aufs ...
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0answers
11 views

Boot on aufs layered root file system

I would like to have a root file system composed of several aufs branches mounted on /. My Linux is a custom one created using buildroot and deployed on a board with a SAMA5D2 processor. The mmc of ...
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0answers
56 views

how to mount aufs filesystem?

I've been learning docker and decided to try out the unionfs aufs. But I couldn't find a way to do it. I tried mount -t aufs but it complained that aufs was unknown. $ sudo mount -t aufs -o dirs=./...
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0answers
12 views

Is there any way to check the most requested(in terms of IO) areas of the file-system inside a docker container?

I've recently read this interesting suggestion under "Performance best practices" subtitle here: https://docs.docker.com/storage/storagedriver/aufs-driver/ Use volumes for write-heavy workloads: ...
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1answer
20 views

Need to switch debian FS readonly writable layer from tmpfs to aufs to not lose files after booting

I'm trying to have this done on a debian 9 based embedded system. The fs that come for root is mounted as such in /etc/fstab: # /etc/fstab: static file system information. # /dev/mmcblk1p1 / ext4 ...
2
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1answer
63 views

init boot mount: mounting /root on /root.ro failed: Invalid argument, aufs

I am trying to set up a read-only filesystem at /root directory on my embedded device. I have following in code in my boot init command file /sbin/init-overlay: rootmnt=/root ro_mount_point="${...
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2answers
184 views

Can aufs be used as fuse filesystem like unionfs-fuse?

I'm experimenting with different union/overlay filesystem types. I've found unionfs-fuse package in Ubuntu which allowed me to use unionfs mount command as non-root user. But it seems aufs, which is ...
0
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1answer
281 views

Is this a good idea for backups using rsync, squashfs, and aufs?

I currently do my backups using rsync, and hardlinks. I create a new full one every year, and then incrementals every day. I like the way I can browse it in an ordinary file manager, and that access ...
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0answers
24 views

AuFS reads and writes from different branches

I'm looking for a way to keep /etc files from a distribution intact, and keep any customizations in a separate partition, using AuFS to lay the customizations over the default files. Is it possible ...
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0answers
126 views

how to let aufs use more than 127 layers? or an alternative to it

I came to the conclusion that aufs is limited to 127 layers based on tests. (prepare) mkdir write joined {1..400} for((i=1;i<=400;i++));do echo >$i/$i.txt;done #for checks using a single ...
6
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1answer
3k views

Unionfs vs Aufs vs Overlayfs vs mhddfs, which one do I use

I have randomly been reading about union file system which enables a user to mount multiple filesystems on top of one another simultaneously. However, am finding trouble deciding on which one to use(...
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0answers
87 views

Opkg, update dual r/o rfs's under aufs

Using Opkg I'd like to update two different Linux 3.16 based RFS's partitions. They are both mounted read only & there is a data partition, which via aufs, does the write overlays. How can I do an ...
6
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1answer
554 views

Union mount options in Fedora

I've grown up a Debian/Ubuntu guy and I'm learning Fedora by trying to recreate the services my Ubuntu trusty box currently provides. However, I'm trying to recreate a union mount and don't see any ...
0
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1answer
113 views

drop_caches fixes AUFS, why?

I have a file test.txt at: ./a/test.txt (1 KB, old one) ./unionWritableFolder/test.txt (2 KB, should be overriding) ./unionMergedFolder/test.txt (1 KB, old one) if I do this: ...
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0answers
87 views

How do I access the rw “branch” (as in “aufs branch”) of an overlay mount?

According to /etc/mtab, my live CD system uses an overlay mount [/cow / overlay]. I can easily browse the /rofs mount [/dev/loop1 /rofs squashfs]. How do I get a /rwfs mount? That is, how do I access ...
1
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1answer
156 views

Mount unionfs (or aufs) branches fed from stdin?

Is it possible to feed the branch paths from stdin to the mount (or mount_unionfs) command, instead of supplying them as arguments or from a file? cat ~/dirs_with_photos.txt | mount -t unionfs I don'...
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1answer
404 views

Merge two folders with the same tree (auFS)

I am trying to merge two folders that contain the same tree and bring them together in a third folder that contains a link to the contents of two different folders, it is possible with auFS? If this ...
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0answers
319 views

File not createable in one directory having the same permission as another directory where it is

Trying to create a file in one directory works, whereas in a sibling directory with owners and permission copied, the same errors out with Permission denied. (touch as root works in both directories.) ...
3
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0answers
111 views

overlay-filesystem that can differentiate between metadata and file content?

AFAIK with aufs when a file is touched (ie. only it's metadata changed, not it's contents), then the copy-on-write mechanism of the file system will copy the whole file into the r/w layer, essentially ...
4
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1answer
549 views

How does AUFS store deleted files?

When I change a file in an AUFS-mount, that change gets stored somehow in the rw-layer. It is clear how new/changed files are stored in the rw-layer, but how get deleted files remembered there?
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0answers
97 views

apt-get upgrade with /usr/bin on aufs fails to create backup link [duplicate]

I'm trying to update a frugal persistent (root and home) install of antiX-15 x64 from stable to testing. I changed the source lists and ran apt-get update. apt-get upgrade then fails with the ...
2
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1answer
580 views

Making aufs union mounts read-write

So I've got two systems, lucyvanpelt and schroeder. lucyvanpelt's /home is exported read-write to schroeder via NFS. Its location on schroeder is /mnt/home/lucyvanpelt I want to union-mount it with ...
0
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1answer
215 views

aufs root on gentoo/funtoo

I have used an aufs root before on gentoo years ago, but cannot seem to get it going now. I am using genkernel-next, I would imagine I used genkernel before as well. I am using funtoo with aufs-...
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1answer
335 views

AUFS only changes permissions of the topmost directory

I have two writeable directories branch1 and branch2 tied together with AUFS on Debian 8 to the mount point union. Mount options: br=branch1=rw:branch2=rw branch1 and branch2 each contain a ...
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0answers
227 views

aufs fs is being mounted before component parts

I'm having issues at boot time. It fails to mount the aufs (and so suspends the boot asking if I want to continue... no good on a server) I thought I had set up my fstab to mount the aufs AFTER the ...
1
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1answer
927 views

Docker in Crouton - VFS consuming astronomical amounts of space

I'm attempting to help out a roommate who has installed Kubuntu on his Chromebook using Crouton (it's basically just a fancy chroot run within ChromeOS). I helped him get the Docker daemon running, ...
2
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0answers
521 views

How can schroot works with aufs

I'm using schroot with aufs. Currently, my conf file under \etc\schroot\chroot.d looks like [trusty_chrome] description=Ubuntu 14.04 Trusty running Chrome and Adobe Flash directory=/srv/chroot/...
2
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1answer
1k views

Docker - Force to Use AUFS Instead of BTRFS

I am having significant problems using Docker on my BTRFS filesystem, and I suspect that is due to a lack of stability with the BTRFS driver. I would rather figure out how to switch the fs driver than ...
1
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1answer
948 views

Do files with equal name conflict in unionfs (aufs)?

I just tried to mount two folders in one using aufs on Debian 7 wheezy. The command I issued is the following: mkdir /test1 mkdir /test2 mkdir /test mount -t aufs -o dirs=/test1:/test2 none /test ...
3
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0answers
285 views

How to start aufs for two local directories

I'm trying to create a sandbox for testing an untrusted software. I'm using Debian, I have installed aufs-tools. When I try to mount a minimal example with the following command: mount -t aufs -o ...
8
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1answer
1k views

Aufs Whiteout removal

I'm using AUFS for merging 100+ branches for a project. At runtime, I frequently add or remove few branches. Now, If I have a branch named "firefox-21.0" and If I update/modify one of it's file then ...