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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File system queue where old media is deleted to make space for new [on hold]

Imagine having a limited file system of 24MB and each JPEG (1MB) stored from a security camera each hour. I want to keep the last 24 hours and therefore the oldest JPEG needs to deleted as a new one ...
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1answer
22 views

Dir size increases after rsyncing to a different machine with same configuration

Have a MySQL (percona, 14.14 Distrib 5.6.28-76.1) machine with a 1TB SSD hosting around 712Gb of mysql data. MySQL has 4 databases, with, say database1, taking major space, 656Gb. Lets call this ...
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21 views

Samba/CIFS Ubuntu 14.04 mount error(112)

I'm trying to mount a samba network share on an Ubuntu 14.04 using cifs. On the server, I've got the share running. I can already map it as a drive in Windows. The share has a username and password. ...
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1answer
18 views

CentOS: How to group two partitions to one document root?

i have 2 partitions in my cloud server. And i want to group two of these become one as Apache document root. Because i have some websites and data is around 80GB. Does it possible? /dev/vda1 ...
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5answers
55 views

How do I increase a partition size (that doesn't use LVM) without removing and re-adding it

I have /usr on a separate partition. At the moment, this is how the server is set up: [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 4.9G 329M 4.6G 7% ...
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2answers
275 views

Optimizing storage of 10-20 million files on RAID5 (currently using LVM+XFS)

Although I've browsed some of the questions here, I think every situation is different and maybe requires a totally different solution. What I have now: Linux software RAID5 on 4x4TB enterprise HDD ...
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2answers
50 views

ext4 mount flags for 10+ mill files storage

I've initialised one large primary partition with the -T small flag to mke2fs, small on the system is configured as follows: small = { blocksize = 1024 inode_size = 128 ...
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8 views

Pool remote file shares into single volume

I have multiple file shares available to use as backup storage. Each one can be mounted over CIFS/NFS. Instead of mounting them all individually and trying to manage what files are stored on each one, ...
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33 views

Estimate when a filesystem will be full

Background I'm managing about 50 CentOS 5.6 Linux servers in my workplace with some critical filesystems that store weekly backups of applications, databases and user workplace files. Problem Last ...
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1answer
33 views

What is the best way to isolate vhosts on a linux server?

Firstly, I'm wondering what is the best way to isolate Apache's vhosts from each other. I suppose this has something todo with the Linux filesystem as well, since it's not a good practise to have ...
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7 views

Can you create a virtual filesystem on available space of existing filesystems? [migrated]

I currently have 4 ext4 disks in my PC. Together they have about 4TB of space available. I want to store a 3 TB image just for a day. Is it possible to create a temporary virtual fs across the ...
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34 views

Granting FTP users access to multiple folders on CentOS

I'm have a web server running CentOS Linux 7.2.1511. I do most of the mundane management tasks through Plesk 12.5.30 Update #29 but I also SSH in and get dirty with the command line when I need to. ...
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1answer
21 views

Overmount existing directory contents at runtime

I have the following scenario: users run software installed in /path/to/software I create a file-backed FS image with exactly the same contents as in /path/to/software I mount the image using ...
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28 views

Branch office replicated file system

I'm looking for something that can replicate file systems between multiple branch locations. Our file servers currently run CentOS 7. I feel like there has to be a better solution that what we're ...
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25 views

How to interpret the contents of /lost+found after serious filesystem corruption?

I am trying to work out whether some serious filesystem corruption is recoverable or not - however, I am struggling to find a definitive description of what i am seeing in /lost+found anywhere on the ...
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1answer
76 views

Rsync takes 8+ hours to backup 15M+ files

I have ~700GB storage where I store ~15M files, hence average file size is ~50KB. To back it up, over night I run a simple rsync script with the following set of flags: --archive --update --compress ...
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29 views

Can't find used inodes on server

I have a Xen VPS with Debian Linux installed. Once I found that all inodes are used. I checked this: ~# df -i Filesystem Inodes IUsed IFree IUse% Mounted on rootfs 3932160 3932160 ...
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23 views

Windows Server: file system limitation

We are developing an app for tablet which uploads and saves photos taken by the user. The problem we are suddenly meeting is that photos are not saved anymore in our directory in our Windows server ...
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2answers
102 views

How to correctly create a filesystem on disks that are connected to a RAID disk?

I want to create a ext4 filesystem on sda, sdb, and sdc and mount them to use them but I don't know how to handle all the raid stuff. lsblk output: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda ...
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44 views

Can Btrfs use SSD for metadata and leave bulk data on HDD?

is it possible for Btrfs to use SSD for metadata only & leave bulk data on less costly storage such as HDD? I refered to this page Using_Btrfs_with_Multiple_Devices and can not find a solution. ...
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1answer
40 views

How to avoid loosing changes on the root filesystem when kernel upgrading?

On Solaris and variants, it makes a zfs clone of the current / filesystem and installs the new kernel there. When rebooting you get the new /. In my case I have a /scripts directory, so if I ever ...
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2answers
65 views

how do I check if a bind mount on linux is private or shared?

The mount command allows us to make a bind mount shared, slave, shared+slave, private or unbindable, however, I was unable to figure for a given mount point what is type of subtree rooted at the ...
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1answer
113 views

Sluggish performance on NTFS drive with large number of files

I am looking at this setup: Windows Server 2012 1 TB NTFS drive, 4 KB clusters, ~90% full ~10M files stored in 10,000 folders = ~1,000 files/folder Files mostly quite small < 50 KB Virtual drive ...
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1answer
15 views

Can't find logical volume when booting imported disk images in Xen guest

I've got a couple of drives I copied over using ddrescue to image files for booting under Xen. They contain an LVM volume group with a couple of volumes in it, which was originally split across two ...
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1answer
37 views

df -h shows 100% usage but sizes don't add up [duplicate]

I have a situation where my root filesystem is supposed to have plenty of free space, but Debian behaves as if it had no free space left. Non-root users even refute to write anything complaining about ...
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66 views

XFS On VMware VM Fails With Bad Magic Number

I have almost exactly the same problem as described here. I am on RHEL7. 3.10.0-229.4.2.el7.x86_6 Inside vmware VM. file -s /dev/sdb /dev/sdb: LVM2 PV (Linux Logical Volume Manager), UUID: ...
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9 views

Create two users with different privileges for the same folder

I've the following scenario: I need to create two users that will access in FTP the same folder with different privileges by using vsftpd. What do you recommend me? Is it a good idea to create ...
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1answer
21 views

Can a folder on Linux be belonged to multiple users?

I have one folder on Ubuntu that can be read and written by user A and can be only read by user B. The solution I came up with is the following: create a group which have read permission on this ...
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27 views

Linux File Permission CVSD

I have a CVSD server on debian. which has few user who can access all the files and folder under cvs repository. but now i want to remove permission for one user only for one specific folder. That ...
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1answer
25 views

Filesystem block size confusion

I know that block size is, generally speaking, the minimal operation unit of a filesystem, but I was confused by fio, the I/O performance benchmark tool, which has a bs parameter to set the "block ...
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3answers
45 views

File permissions are being changed after gunzip of .gz file; how do I prevent that?

I have an NFS4 filesystem that has AD based authentication setup and ACLS to match. I am controlling access to the machines that mount the filesystem so the ACLs are very basic. One prevents users ...
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47 views

OverlayFS: How Can I Delete Files, Not Hide Them

I am trying to aggregate two mount points in to a single directory so that it will combine the files from both in to a single mountpoint. I am doing some tests with overlayfs and have been able to ...
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1answer
22 views

Cannot Create A Directory Called 'partition' On msdos Flashdrive

Really strange issue that I've encountered. I have fedora 23 and a flash drive that I play with writing some scripts for mount/unmount operations: /dev/sdb1 on /run/media/mymounts/kol type msdos ...
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1answer
86 views

VM filesystem in read-only mode

I have a VirtualBox Ubuntu VM with a virtual disk that is mounting as a read-only filesystem. I'm not sure why that is, and my attempts to remount as read/write haven't worked. One of the last things ...
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25 views

Shrinking an img file that contains linux partitions

I've got an img file (4,02GB) containing a Linux OS. My goal is to shrink this img filed down to < 4GB. The img contains a linux partition that only holds about 2,5GB of data. I need to be able to ...
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1answer
81 views

Unable to enable LDAP authentication on GPFS / Spectrum Scale file system

I have setup a GPFS / Spectrum Scale cluster on 2 RHEL7 nodes. On that cluster I have created a filesystem. I want to enable LDAP based authentication with kerberos so that I can NFSv4 ACLs to ...
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3answers
94 views

How do you securely shred a file from a RAID 6?

I'm looking for a way to delete a file from a RAID 6 implementation in a secure fashion (shredding). Do I need to delete the file from the RAID, disassemble the RAID, wipe the free space of each ...
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1answer
135 views

Resizing CentOS partition using parted

I am using CentOS 6.x. I would like to resize the LVM partiion, but I am little confused when I use parted to see the partition information. I have a few questions. Please look at the partition ...
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1answer
22 views

Get free capacity of an ocfs2 volume

I want to get free capacity of an ocfs2 volume (ocfs2-tools version 1.6), which is not mounted any where. Is there way to do that. Thanks
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1answer
100 views

How to get filesystem information of a logical volume which is not mounted

In linux, I want to get file system type of an ummounted logical volume. Is there any way to do that
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1answer
34 views

quota exceeded without files

How is it possible for a user/group to exceed its quota without owning any files? Here is an extract of my repquota output: *** Report for group quotas on device /dev/mapper/lata Block grace time: ...
2
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1answer
53 views

Filesystem Performance for LUKS Encrypted Volumes?

As you can format a LUKS volume with any filesystem you want, are certain filesystems better-suited to IO performance against an encrypted filesystem? Specifically, I'm wondering about a loop device ...
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1answer
36 views

Error trying to enable LDAP with kerberos authentication with GPFS

I have 3 RHEL7 nodes with GPFS / Spectrum Scale 4.2.0.0 installed. The 3 nodes have been setup with GPFS as a cluster with a GPFS filesystem created. I am trying enable LDAP based authentication ...
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0answers
26 views

Bad performance on ocfs2 with many files

i am managing a small science server infrastructure with an ocfs2 storage. On the storage are about 9.000.000 files consuming 4,7 TB. The files itself a really small around 500KiB-1Mb. The problem is ...
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2answers
135 views

What kind of ACL storage to use for a Samba domain controller on ZFS and FreeBSD

I want to set up a Samba domain controller on a FreeBSD hosts that uses ZFS for file storage. When I try to run samba-tool domain provision as documented on the Samba Wiki article on setting up a ...
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60 views

Read only file system after every reboot - centos

Some time ago I got disk full problem and after that everytime I reboot my centos server, the system loads with read only system files. Running mount -o remount,rw / will solve my problem. But ...
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4answers
78 views

Scan windows file system for directories containing certain words

Is there a command that I can run on a windows Server 2008 r2 that will only show directories that contain a certain word. For Example I want to find all directories that contain "logs" That means ...
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1answer
21 views

What happens when I press Ctrl+C when e2fsck running?

What happens when I press Ctrl+C when e2fsck running ? will it go to command prompt ? or it will reboot & then the server again goes to fsck ? Reason Why I want ? I want the server to up ...
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24 views

Windows Object Access Audit vs File Properties “Accessed” Date/Time

I'm attempting to audit all attempted access to a specific executable on a Windows 2008 R2 system, and have turned on success and failure auditing for all subcategories in "Object Access" in Advanced ...
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2answers
27 views

Prevent root in linux from changing folder permissions in GPFS filessystem

I have created a NFS export in a GPFS/SpectrumScale filesystem I created. I have enabled AD based authentication with our domain. Everything works. The NFS export was created with NFS4. The NFS ...