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Questions tagged [aufs]

9 questions
5
votes
3 answers

AUFS missing in Redhat Fedora, is there an alternative way of stacking directories?

I can't find Aufs in Redhat's Fedora, or any other stackable filesystem for that matter. It seems this is due to relabelling limitations of SELinux. Is there a way to achieve similar without resorting to file/dir copy. I have the following list of…
irishjava
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2 answers

tmpfs fills up, although hardly used. How can I debug this

I have a system with / on tmpfs. Most / subdirectories have aufs mounted overlaying the read-write root filesystem with read-only base filesystem (the system boots from a read-only medium). Earlier, I used to use unionfs instead of aufs. It has…
Jacek Konieczny
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How to emulate union mount behaviour with LVM in CentOS?

In short, I want to create a system restore image. My idea with AUFS is like the image below Now, as I require this mount setup at boot-time, I don't think I can do it with fuse and will require AUFS kernel support, which, CentOS 6.x doesn't have.…
Samik
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1 answer

Can one set up a write-through cache with aufs?

Say I have a system with two filesystems; one fast, small and unreliable (ie: ec2 ephemeral disk) and one slow, big and reliable (ie: ebs). Can I union mount the two filesystems so that the fast, unreliable FS acts as a write-through cache in front…
bobpoekert
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1 answer

AUFS: How to create a read/write branch of only part of a directory tree?

AuFS (another union file system) allows us to merge two trees into one, even when those trees overlap. We can then direct writes to the merged tree towards one of the branches and reads to another. The classic use of this is with a flash file system…
Jay M
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1 answer

Is it possible to speed up network filesystem by sth like unionfs, aufs?

I need to speed up slow, large storage with local SSD drive. I figured out I could do this with union filesystems. Here are results with nginx reading data from: local SSD alone: ~140 transactions/s. large-slow storage alone: ~25…
Matt
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1 answer

AuFS read only branch as another read only branch

My goal is to use an AuFS read only branch as another read only branch: I've got a directory dir0, then I make : mount -t aufs -o br=dir2=rw:dir0=ro none dir1 This gives me - dir0 - dir1 #read only dir0 - dir2 #write layer of dir1 I now want to…
rmonjo
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Is it possible to disable copy on write for AUFS?

I would like to set up a union mount with aufs such that new files can be created on a writable branch, but existing files cannot be modified. Is it possible to disable copy on write so that if an attempt is made to modify a file that already exists…
gregsymons
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What happens with a Aufs location if a drive is lost

If I use Aufs to show a unifid filesystem to my Ubuntu server and then one of the drives break. Will the storage become missing or will it just not show the data from that drive but show the rest.
rbn
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