Questions tagged [aufs]

AUFS is an advanced multi layered unification filesystem.

Filter by
Sorted by
Tagged with
2 votes
0 answers
213 views

Overlay mount at btrfs

I multiboot several distributions which are at separate subvolumes. They are stored in a not standardised layout. I have some subvolumes which I want mounted in a layered way. I prefere to use aufs . ...
Peter G Holm's user avatar
0 votes
0 answers
67 views

How to mksquashfs AUFS filesystem without '.wh..wh.' but including files whiteouts?

I have an AUFS filesystem mounted in a live session and I want to use mksquashfs to compress it into a single file. In the root folder I have: .wh..wh.orph/ .wh..wh.plnk/ dev/ etc/ home/ lib/ mnt/ ...
Fulalas's user avatar
  • 121
0 votes
1 answer
134 views

How can I use the Trusted xattr namespace on FreeBSD 11.2?

I'm trying to translate whiteout files from the AUFS format to the kernel-overlay FS format. This entails marking certain directories with the extended attribute trusted.overlay.opaque = y. ...
Anaxagoras's user avatar
0 votes
2 answers
894 views

how to make mergerfs behave like I did aufs behave: only write everything new or modified (including paths, everything..) to a single writable folder?

I need this behavior because I need to know what the application using the merged folder will do, so I can backup it properly and consistently with small backups. I need to force it behave like I did ...
Aquarius Power's user avatar
2 votes
0 answers
826 views

Use SSDs as persistent buffer for HDDs to decrease power usage

similar questions have been asked multiple times ... How to use an SSD for caching, so my hard disks can spin down? Caching write changes on SSD to avoid HDD spin-up? ZFS, but (probably) not L2ARC ...
Max Beikirch's user avatar
2 votes
2 answers
857 views

How to install grub to empty disk from ubuntu liveCD

Disclaimer: I'm a newb and I need step by step guide. Thanks! I want to first install grub without OS, since it will boot from ISO file off the local network storage. I'm booted into a liveCD (I can't ...
newbie's user avatar
  • 23
9 votes
1 answer
1k views

Stackable file system that works like a cache

I am looking for a stackable file system (Like UnionFS, aufs, and OverlayFS) that works similar to bcache or lvmcache but on file level - not on block level: Reads will be done from top-layer. If the ...
Ole Tange's user avatar
  • 35.6k
1 vote
0 answers
773 views

How to mount aufs filesystem on debian 10?

I want to union some folder, current I use mergerfs, I try to test aufs. When I mount aufs, it jump a error. $sudo mount -t aufs -o br=./a:./b none ./c mount: /home/t/c: wrong fs type, bad option, ...
fcying's user avatar
  • 11
1 vote
1 answer
701 views

Which (if any) union filesystems allow you to mount them without an underlying filesystem?

I am considering using a union filesystem, such as aufs, UnionFS or OverlayFS. I have a 138GB of Android source, to which I want to make minor changes and keep them under version control. My plan is ...
fadedbee's user avatar
  • 897
3 votes
0 answers
510 views

Why does cache work better in overlay2 than aufs?

A follow-up from this question. After reading Docker Storage drivers from official doc I understood that overlay was faster than aufs because it had only one hard linked image layer. But for ...
rokrokss's user avatar
1 vote
1 answer
112 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 ...
cptully's user avatar
  • 119
0 votes
2 answers
3k 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=./...
z.h.'s user avatar
  • 1,004
1 vote
0 answers
17 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: ...
Hudson Santos's user avatar
0 votes
1 answer
214 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 ...
JJ Adams's user avatar
  • 113
2 votes
1 answer
1k 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="${...
Gopal Kildoliya's user avatar
1 vote
2 answers
1k 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 ...
Anwar's user avatar
  • 123
3 votes
1 answer
2k 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 ...
user276075's user avatar
1 vote
0 answers
47 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 ...
alecov's user avatar
  • 250
2 votes
0 answers
379 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 mount, ...
Aquarius Power's user avatar
31 votes
2 answers
20k 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(...
David Okwii's user avatar
1 vote
0 answers
188 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 ...
Nimjox's user avatar
  • 125
6 votes
1 answer
1k 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 ...
Rob D.'s user avatar
  • 61
0 votes
1 answer
169 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: ...
Aquarius Power's user avatar
2 votes
0 answers
178 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 ...
glarry's user avatar
  • 924
1 vote
1 answer
276 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'...
Sridhar Sarnobat's user avatar
1 vote
1 answer
891 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 ...
Gérard Le Cloerec's user avatar
3 votes
1 answer
432 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 ...
Udo G's user avatar
  • 1,123
5 votes
1 answer
943 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?
Udo G's user avatar
  • 1,123
3 votes
0 answers
123 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 ...
Jannis's user avatar
  • 31
2 votes
1 answer
969 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 ...
Steely Dan's user avatar
0 votes
1 answer
267 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-...
Walter's user avatar
  • 1,234
1 vote
1 answer
458 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 ...
Kontrollfreak's user avatar
1 vote
0 answers
339 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 ...
smremde's user avatar
  • 151
2 votes
1 answer
1k 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, ...
Wieschie's user avatar
  • 123
2 votes
0 answers
728 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/...
Tianren Liu's user avatar
2 votes
1 answer
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 ...
Californian's user avatar
1 vote
1 answer
2k 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 ...
giovi321's user avatar
  • 897
3 votes
0 answers
333 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 ...
vbence's user avatar
  • 395
8 votes
1 answer
2k 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 ...
SHW's user avatar
  • 14.8k