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1
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0answers
15 views

Many transient files on journaled filesystem?

Writing and deleting many files quickly I'm going to write many temporary files per second, over a sustained period. Each will be deleted after some milliseconds. Say we have an image processing ...
13
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3answers
4k views

What mount option to use for ext3 file system to minimise data loss or corruption?

I have an embedded setup using an initramfs for the root file system but using a custom ext3 partition mounted on a compact flash IDE drive. Because data integrity in the face of power loss is the ...
28
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2answers
1k views

Why did powering down my machine after a bad `rm` save my files?

Classical situation: I ran a bad rm and realized immediately afterwards that I had removed the wrong files. (Nothing critical and I had tolerably recent backups, but still annoying.) Knowing that ...
18
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6answers
6k views

Is there a file search engine like “Everything” in Linux?

On Windows there a nice file search engine called Everything, which is (unlike find) very fast and (unlike locate) always returns up to date results. AFAIK it works by filling a database from the ...
2
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1answer
242 views

ext4 filesystems frequently corrupting

We have occasional power outages in our environment which seems to cause data corruption on our Ubuntu machines with ext4 filesystems. To my understanding ext4's default is to use data=ordered ...
7
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2answers
197 views

what does a “deleted file” entry look like in the journal

I hope I've got this right: A file's inode contains data such as inode number, time of last modification, ownership etc. – and also the entry: »deletion time«. Which made me curious: ...
2
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2answers
1k views

How to clean journals in ext3/ext4 filesystem? [closed]

Some preamble: I'm taking bitwise copy of disk devices (via dd command) from twin hosts (i.e. with the same virtualized hardware layout and software packages, but with different history of usage). To ...
2
votes
2answers
3k views

huge .sujournal file on FreeBSD

I am running out of space and when I checked, I found that I have # pwd /usr # ls -l .sujournal -r-------- 1 root wheel 33554432 Dec 31 1969 .sujournal I wanted to ask should/can I remove it? ...
2
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0answers
144 views

jbd2 journal constant i/o

iotop reports a constant i/o about 3% of [jbd2/vda1-8], I think this is the journal manager for ext4. my fstab is: UUID=X / ext4 defaults,noatime,nodiratime 1 1 tmpfs /dev/shm ...
2
votes
1answer
141 views

Minimizing “idle” writes on a file system

Leaving out many details, I need to create a read/write file system on a device with the following main goals: Eliminate all writes while data is not being explicitly written. Reduce all indirect ...
19
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5answers
4k views

Do journaling filesystems guarantee against corruption after a power failure?

I am asking this question on behalf of another user who raised the issue in the Ubuntu chat room. Do journaling filesystems guarantee that no corruption will occur if a power failure occurs? If this ...
1
vote
1answer
367 views

why kjournald uses writes so much?

Total DISK READ: 1056.26 K/s | Total DISK WRITE: 9.20 M/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 1055 be/4 root 0.00 B 11.64 M 0.00 % 1.99 % ...
1
vote
1answer
2k views

Which drive had a “journal commit I/O error”?

I received a message: kernel:[123456.789012] journal commit I/O error Which disk drive had the journal error?
2
votes
1answer
109 views

To use -c0 -io in file-systems with journal

I've several partitions with EXT4. Now, I would want if it makes sense to use tune2fs with flags -c0 (max-mount-counts) and -i0 (interval-between-checks) in the partitions with a journal file-system ...
0
votes
2answers
1k views

Keep ext4 journal on another system, how much space would be necessary?

I'm going to move journal to another partition, but I don't know how to correctly caculate the size needed for journal? I'm running ext4 file system with 15GB capacity.
1
vote
1answer
8k views

disabling journal vs data=writeback in ext4 file system

What is the difference between disabling journal on ext4 file system using: tune2fs -O ^has_journal /dev/sda1 and using data=writeback when mounting? I thought ext4 - journal = ext2. means when we ...
2
votes
1answer
209 views

With full data journaling, why does data appear in the directory immediately?

I've got a question regarding full data journaling on ext3 filesystems. The man page states the following: data=journal All data is committed into the journal prior to being written into the main ...
5
votes
3answers
292 views

Is ext2 suitable for daily use on a desktop or laptop?

Is a journaling filesystem needed in today's desktop world? A good OS doesn't kernel panic every month, and if we are using a laptop, then there aren't any power outages, so why shouldn't we use ...