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Questions tagged [filesystems]

A file system (or filesystem) is a means to organize data expected to be retained after a program terminates by providing procedures to store, retrieve and update data, as well as manage the available space on the device(s) which contain it.

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cross OS file system that works on Windows 10+, Linux, and OS X

First, I realize there are many duplicate questions but they are all quite old and their answers may not be relevant anymore. I would assume (or hope) that in our constantly evolving technology ...
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2answers
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Logical Volume /dev/centos/root is extended but /dev/mapper/centos-root is not

New to Linux Fileservers and trying to extend /dev/mapper/centos-root This is a test server The Logical Volume /dev/centos/root is 27.99GB large: --- Logical volume --- LV Path ...
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1answer
42 views

Set default file permission mode without ACLs

I have an AWS EFS share, which does not support filesystem ACLs. How can I set a folder inside the EFS share to default to mode 664?
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1answer
69 views

I deleted all the contents of /boot and now server is not booting

I did something stupid. My thinking was that /boot directory is empty and contents come to /boot each time the computer starts. My /boot drive was giving me error messages no space left so I thought ...
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Converting btrfs to zfs without using a different hard drive/partition

I know that in the general case you can't just change your filesystem on the fly but some close filesystems do support such conversions, like ext2 to ext3. I'm wondering if it is the case between a ...
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2answers
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Cant access Windows Server via NetBIOS but FQDN works

2 Windows 10 machines. Machine1 can access \\Server1 via NetBIOS. Machine2 can not. However Machine2 can access \\Server2 via NetBIOS and Machine1 can not. If you use the FQDN it works without issue ...
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What is the backend file system used for OpenEBS Jiva and cStor volumes?

I just got to know about OpenEBS project and I have few doubt regarding the storage engine backend filesystem. What is the backend file system used for OpenEBS Jiva and cStor volumes?
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1answer
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rsync file size discrepancies [duplicate]

I have a few PC's with an ext4 filesystem that I want to backup to a file server which is also ext4. Problem is there are some discrepancies in file sizes when using rsync, and I have noticed this is ...
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1answer
59 views

Hide folder structure on server for images with nginx

I have the following folder hierarchy on my server: /var/images/d/d8/d82fa6c3eed/image.png The directory structure is created from an MD5 hash and broken up into sub-folders. I would like to ...
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1answer
65 views

File system, that handles over 2 million files

I'm going to store files in one folder in my server. The amount of files will exceed 2 million. Each file size will have range between 5MB - 100MB. What kind of file system can handle well that ...
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1answer
18 views

Changes in fs.* after rebooting?

After rebooting my machine, sysctl -a gave me different outputs (some of changes like kernel.sched_domain.cpu0.domain0.max_newidle_lb_cost is expected): 16c16 < fs.dentry-state = 37641 15280 ...
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1answer
42 views

how to create ramfs or tmpfs that won't be existed after reboot?

For security reasons I want to setup a temporary directory or partition that will be removed if the system rebooted or in case of power outage. I tried to create a tmpfs but the files where there ...
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2answers
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Centos 7 Move storage space from one filesystem to another

I have a server using Centos 7, and with the storage capacity allocated as such: What I would like to do is take some of the space from the /dev/mapper/centos-home file system and give it to /dev/...
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zombie file under linux

When trying to unininstall cups from a linux machine some kind of "schrödingers file" was left behind: ls shows it, but otherwise its not there. System is ubuntu 17.10 / kernel 4.13, filesystem is ...
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3answers
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Union multiple mounts to a single point, but keep them all read write

I've got over 1,000 directories, spread out over 6 servers. Technically they are home folders. It's guaranteed that there will never be any duplicate folder names. What I'd like to do is to mount ...
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1answer
258 views

Understanding XFS inode limits

I reached the inode limit on my XFS partition. There are plenty of questions about this. Some suggest the answer is to increase the maximum percentage of space allocated for inodes. Or, as the ...
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1answer
83 views

Master-Master File Sync between DataCenters

My problem is regarding a master-master (3 master nodes) file synchronization setup, where each node is in a different DataCenter. I have three application servers where users can create/modify/delete ...
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1answer
109 views

CentOS: eror when removing file: “rm: cannot remove '.viminfo': No such file or directory”

I have a file named .viminfo in home directory. I can see that the file is there by ls -lh: $ ls lh ... drwxr-xr-x. 2 mt1022 1091 4.0K Oct 12 2016 .vim -?????????? ? ? ? ? ...
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How to recover [unknown] disk from LVM2 on Proxmox

On my server, i have 5 disks. The disks are configured as follows: Raid 1 (Disk 1 + Disk 2) [320gb each] - Proxmox installed Raid 1 (Disk 3 + Disk 4) [1tb each] + HDD (Disk 5) [1tb] = totalizing 1....
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1answer
29 views

How to diagnose/fix slow file management on Windows Server 2012?

The setup is: FUJITSU PRIMERGY TX300 S7 RAID Ctrl SAS 6g 5/6 512mb (d2616) Windows Server 2012 64 bit Volume C: RAID 1 (2 HDDs) Volume D: RAID 5 (8 HDDs) The problem is: When we do ...
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2answers
225 views

How to copy user permissions in Windows server 2012 r2?

I have windows server 2012 r2 and two storage drive. lest say A and B. I have created users and given files and folder access in drive A but now it is crashed and now I want to give all the same user ...
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OpenShift: Restrict pod/container size

We have the following, somewhat hypothetical scenario: An application, running in a container. This application does not follow the design guidelines and doesn't log to stdout, but into a file. If ...
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2answers
279 views

what is the relation between block size and IO?

I have been reading about disk recently which led me to 3 different doubts. And I am not able to link them together. Three different terms I am confused with are block size, IO and Performance. I ...
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Gluster: how to setup distributed replicated volume with different size

Say I have 4 servers, each with ZFS volumes. Two servers with 36GB each. And two servers with 60GB each. I want to use glusterfs to setup two replicated volumes between the similar sized ZFS volumes. ...
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1answer
52 views

Re-allocate space from one Volume Group to another Volume Group - Linux CentOs

I have a dedicated server provided to me by 1and1. I started migrating websites to the server only to realise that I am running out of disk space. I had to clear my backups in order to continue ...
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Resize (enlarge) filesystem to partition size [duplicate]

I've got an 16GB SD card with Raspbian on it. $ lsb_release -a No LSB modules are available. Distributor ID: Raspbian Description: Raspbian GNU/Linux 8.0 (jessie) Release: 8.0 Codename: ...
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1answer
41 views

glusterfs client mount point fails with 'Client quorum is not met'

Assume a basic replica 3 arbiter 1 configuration, glusterfs-server 4.0.2 and glusterfs-client 4.0.2. glusterfs-client is installed on Ubuntu 18.04. In order to verify that write / read ops are ...
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1answer
242 views

Tool to track folder changes recursively in ubuntu 16.04

Is there any tool with which I would be able to track any changes happening recursively inside a particular folder? I have used inotifytools and fswatch but both are hitting the server performance ...
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1answer
183 views

How to verify checksum after copying 2 TB of 6 million files over USB?

I have a situation where I need to move over 2 TB of data from one server to another server in another data center. There are over 6 million files to copy. The plan is to move data in phases. For ...
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2answers
222 views

File system keeps becoming read-only

After working for a while, my filesystem (EXT4) becomes read-only. I then use my live USB to boot into live mode and I run fsck on the corrupted partition (and others too, to be safe). I run fsck -y ...
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39 views

I want to delete exiting partition on a ssd and then create a partition and then a file system on the same

I want to delete existing partition on an ssd and then create a partition and then a file system on the same. How can I do it using a single command based on fdisk?
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1answer
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extend file system size on cloud server

On my 1and1 root cloud server I'm trying to extend my file system size after an upgrade. I should have 120gb instead of 70gb. I'm not very experienced with filesystem extending I'm on Ubuntu 16.04.3 ...
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Root cause for having a number of zero bytes in regular files

We have corrupt files that contain a number of zero bytes. I wonder what the root cause could be. What I know is: All kinds of files that were recently written are affected, they contain a number of ...
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1answer
167 views

Data Deduplication and ReFS

I have read a number of posts stating that only NTFS and CSVFS is supported with Data Deduplication, specifically not ReFS. However in this article, which is quite new, it states that it is supported:...
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3answers
272 views

Disabling ext4 write barriers when using an external journal

I'm currently experimenting with different ways of improving write speeds to a fairly large, rotating disk-based, software-raid (mdadm) array on Debian using fast NVMe devices. I found that using a ...
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I got a power loss and my directory became a file (ext4, ssd), what to do?

After a power loss 1 directory (maybe more, I don't know) just became a file on my SSD (ext4 fs): -rw------- 1 postgres postgres 16K May 15 20:06 stolon It was a directory! How could it ...
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1answer
45 views

Corrupt `reverse i-search` database: why and how?

I made a recording of this as it's never happened to me before and seemed pretty weird: https://asciinema.org/a/qVSUzkIX2wLia7EzCFhCYHb9Q Under which conditions would the bash completion database ...
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0answers
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Alpine Linux - root mounted as ro iso9660 filesystem how can I remount as rw overlay? [closed]

The root filesystem is an iso9660 mount. / # mount |grep iso /dev/sr0 on / type iso9660 (ro,relatime) Is there a way to remount root, using aufs in order that I can install packages, compile code, ...
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1answer
86 views

Ansible : format Filesystem subtask fails

I have below task which fails at formatting EBS volume and just do not proceed further. I've checked all the documentation here but I find no issue with ansible task I defined here. --- # tasks file ...
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Is it possible to disable the overlayfs directory cache

I have a process that's continuously writing files into a directory structure that looks like: 152527 ├── 1525270000000 │   ├── 01be6dc0b6e3e087.json │   ├── 067e2490bb7ee05c.json │   ├── ...
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0answers
35 views

File Server performance with simultaneous read/write operation

I have a WORKGROUP network with 50+ devices, all the computers can access a Windows Server 2008 R2 server which hosts all the media in the network. When one or some of the users are copying files from ...
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0answers
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Is it possible to explicitly flush (synchronize) block devices in Windows Server 2008 R2 or later?

I have the following problem: One of my Windows 2008 R2 servers has a designated backup disk which is encrypted using VeraCrypt at disk level. That disk should be exchanged daily without restarting ...
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0answers
675 views

Cleanup /var/run full of systemd sessions

I'm running on a quite small server (2GB RAM) where the /var/run mount is 950MB and a quite long uptime (~600 days). I realized that /var/run is full now: Filesystem Size Used Avail Use% ...
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4answers
108 views

why does a file sometimes appear empty when being written to by another process

We have a situation where files are uploaded to a folder by FTP and then served by nginx. We've found that if the GET request immediately follows the modification of the file nginx returns files with ...
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1answer
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What are all/most ways to enable/disable usage of async file-io in Linux?

To make a long story short, I have two identical servers hosting VMs using VirtualBox and both servers host one VM each nearly setup the same way, only that one is production and the other for ...
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1answer
65 views

How can I prevent high-volume filesystem writes from ovewhelming memory on my Linux system?

In several contexts, I've seen a behavior on Linux systems in which large volumes of filesystem write operations (e.g., many gigabytes of writes, very quickly) will overwhelm memory, apparently ...
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1answer
312 views

Character encoding on Windows Server 2008 R2

I have a problem with filenames on my Windows Server 2008 R2 machine. The files get uploaded by a webserver that runs Linux, on that machine there is a mount to our windows machine. When we upload ...
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1answer
62 views

Wish to set file undeletable but updatable

I don't think this is possible on any Linux file system. But I wish to have a feature of setting a file to be undeletable but keeping the file updatable. Note the latter requirement cannot be met with ...
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1answer
54 views

NTFS - writing small files performance variations

I have some test code that generates a list of 5000 small blocks of data (min. size: 351 bytes, max size: 386 bytes, average size: 385 bytes) and then writes them as separate files to a directory - ...
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2answers
194 views

How to choose appropriate filesystem for my KVM VPS guest?

I'm going to manually install Arch Linux from an ISO image on a KVM VPS that uses SeaBIOS. I plan to use grub2 as the bootloader. My VPS will not hold important data that needs to be backed up. I don'...