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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Join files effectively on Linux

Is there a better way to join files that have been splitted than just doing a "cat" or "join"? These commands just copy the file streams into a new file on disk. A much better way would be ...
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1answer
37 views

Tool for linux file system cache inspection [on hold]

I'm looking for a tool to show what portion of a file is in the file system cache. In the past I have used the fincore tool that is part of the linux-ftools package. linux-ftools isn't in any of the ...
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1answer
159 views

Excessive disk usage with virtfs / cpanel

I'm running a server using cPanel, with virtfs enabled, and seeing very high disk usage compared to the amount of data actually uploaded/created by each user. I am getting DISKWARN emails telling my ...
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1answer
56 views

EXT4 Single Larger Volume or Many Smaller Volumes

My question is regarding the file system performance of EXT4 volumes relative to size. We have a NAS running any arbitrary Linux platform. The NAS has (12) 4TB disks in a hardware RAID 6 with LVM ...
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0answers
6 views

find space used by journal files

Is there any way to find the disk space used by journal. Running xfs on host and ext4 on guest. How can we see the space occupied by journals of these filesystem.is it possible.
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1answer
25 views

How would I be able to take a snapshot of a CentOS 5 server and compare it later on?

I have a consultant that was hired to install some custom software to a CentOS 5 server. After she's done, I'd like to review her changes to possibly automate or optimize them. I was thinking of: ...
4
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0answers
91 views

it's good idea truncate a file while is in use? [migrated]

Around the web many people say you can truncate a file using > filename or truncate -s0 filename while file begin used I know everytime a process write in a file, the process uses a offset for ...
3
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0answers
266 views

ESXi 4.1 VM gone after hard reboot

I have a serious problem here. After I forced a reboot of a freezed ESXi 4.1 server, a VM is literally gone. When I ssh to the host and run ls -lah inside the datastore, it returnes: ...
5
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1answer
1k views

Mount Docker container contents in host file system

I want to be able to inspect the contents of a Docker container (read-only). An elegant way of doing this would be to mount the container's contents in a directory. I'm talking about mounting the ...
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2answers
70 views

Copy/Paste for large file crashing Windows

I have a new Dell PowerEdge T320 server with 1 SSD non-RAID and 3 HDDs in RAID 5 all on one Perc H310 controller. RAM is 48 GB and I have Windows Server 2012 R2 Data Center installed on the SSD. I ...
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1answer
80 views

Where do ext3 inode / meta-data reside?

Just a quick question about ext3: Are inodes stored in the same area as file data, or are there separate regions on the disk reserved exclusively for meta-data and others reserved exclusively for ...
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1answer
245 views

Which file systems do support file locking

I want to use PPSS link text According to the manual, PPSS should be used on a file system that supports file locking. I assume that EXT3, EXT4, JFS, XFS, NTFS do support file locking, but I'm not ...
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6answers
689 views

Do I need a journalling filesystem for both host and guest operating systems when using virtualization? [closed]

Using VirtualBox, I've got a few Linux guests for different distros running on an Ubuntu host. What filesystem layout will give the best performance? Is it worth it to set up a different partition ...
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4answers
5k views

What is the partition id / filesystem type for UDF?

This is probably trivial to check using cfdisk on a UDF-formatted CD/DVD/Blu-Ray, but I have neither of them at hand. I have created an UDF formatted partition on a USB hard drive to share data ...
36
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5answers
3k views

Removing an (apparently) infinitely recursive folder

Somehow, one of our old Server 2008 (not R2) boxes has developed a seemingly infinitely-recursing folder. This is playing havock with our backups, as the backup agent tries to recurse down into the ...
2
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4answers
286 views

Linux filesystem that records all files, even deleted ones

I have a requirement to give a user access to an NFS share on which they may place some files, and then delete the files. Assume they are rogue and may try to really delete the files (I'm not sure if ...
0
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1answer
21 views

Hardware Raid6 - Which FS and mountoptions + basic questions

I've got a new system (Ubuntu 14.04 on an SSD), including 2*Megaraid 9271-8i controller+cachecade & BBU connected to the backplanes of the case. Each controller has 8 WD RED 3TB (4096 Physical ...
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4answers
2k views

Re-sizing disk partition linux/vm

I VM Player running a linux guest and I was wanting to know how do I expand the disk? In the VM player I gave more disk space but I am not sure how to mount/expand/connect the new disk space to the ...
2
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2answers
1k views

How to determine POSIX advisory file locks are working in simfs in the VM I'm using?

I'm looking for a command-line utility or some other way to test effectiveness of file locks, specifically POSIX advisory locks (which aren't only for POSIX, btw) in a Linux filesystem. Specifically, ...
2
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4answers
3k views

MS Windows issue - “Filename or extension is too long”

I run Microsoft windows on a few of my machines. I don't know if many people know about this issue in the OS but you can't have very long filenames, from what I know Linux can have longer names, I ...
4
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3answers
719 views

Why doesn't ls -la show that current directory is symlink?

This is more of a curiosity, but I noticed /etc/httpd/logs is symlinked to /var/log/httpd, but when I am inside of /etc/httpd/logs and I do ls -la I see: drwx------ 2 root root 4096 Mar 21 14:58 . ...
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0answers
35 views

How to manage permissions on shared filesystem in Linux and export it on Windows?

It is a bit complex scenario so I will try to make this a simple as possible for you. ENVIRONMENT I have a shared filesystem on Linux which I export on Windows using Samba4 and users which belong to ...
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1answer
25 views

Writing UNC path names to a different drive? [closed]

To write a link to a file on another server I write \\ServerName\FilePathName which maps to \\ServerName C:\FilePathName How can I write the link to access a different drive, e.g. W:\? I ...
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1answer
51 views

How do i replicate files between two different file structures?

I've got a directory which contains hundreds of thousands of files. A file typically looks like this : CED375_description_01.jpg. I need to move this file to another directory, but the file needs to ...
4
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1answer
51 views

User permissions/feature limitations of the native zfs smbshare service on linux

I'm using zfs on linux, using the sharesmb=on option to try out the native smb share feature instead of adding the zfs tank path to my smb.conf file. The share has shown up on my windows machines, ...
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3answers
1k views

Unable to list contents/remove directory (linux ext3)

System is CentOS5 x86_64, completely up to date. I've got a folder that can't be listed (ls just hangs, eating memory until it is killed). The directory size is nearly 500k: root@server ...
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0answers
23 views

Ubuntu 14.04: add physical space drive to folder with existing content [migrated]

system: a VPS running Ubuntu 14.04, apache 2.4.7 I added a virtual disk drive to my VPS server. I would like that the OS (Ubuntu 14.04) resides on its own "system" drive, and my clients files reside ...
0
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1answer
101 views

OpenBSD automatic filesystem check at reboot

I want my openbsd server to boot, no matter what and dont break with waiting for manual FSCKing. It's easy to do in linux, but in obsd it just doesnt want to be "auto". Last time I set the 6th,7th ...
6
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0answers
59 views

Is there disk based file system with dedicated memory caching for Linux? [closed]

We have two (or more sometimes) applications battling for the OS page cache. In particular ElasticSearch is very dependent on the OS page cache. To the point that cache misses can make or break ...
0
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1answer
178 views

VMWare Error: Read-only file system during write on

I tried hundreds of forums and posts, but nothing seem to help! I have vSphere ESXi 5.5. and when starting ESXi the first time it created and formatted a storage automatically. For some reason I ...
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1answer
50 views

What's a good choice for a general-purpose “non-advanced” filesystem with Linux R/W and Windows/BSD R/O support?

I'd like advice and recomendations as to what filesystem would be ideal for me to use for a 320GB HDD that will replace what appears to be an aging/failing 250GB one. Ideally, I'd like something I ...
2
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1answer
123 views

In linux and solaris, what is the UUID based off of?

If you run dmidecode|grep UUID you are given a "globally unique string of characters" which can be used for licensing purposes. In linux, the format is usually something like this: ...
0
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1answer
45 views

Storing Large Amount of files in a file system?

Guys I am creating an application which will be saving a .txt file (approx 10 KB/file I guess) in a file system and will be saving its path in MS SQL database. Now as per my estimation, approximately ...
11
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1answer
1k views

Is there any way to fix a corrupted LDM database?

TL;DR: Are there any tools/approaches to diagnosing and fixing LDM (Logical Disk Manager) metadata structures without recreating from scratch? Full description: I have two SSD drives ...
2
votes
1answer
29 views

How do I monitor file modifications of a Linux user from the user process instead of the file-system itself? [closed]

We have a requirement to fill that will give us a daily report on all the changes that were made (and who made them) through the SSH protocol; whether it be files or database resources. Monitoring ...
0
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1answer
38 views

Is my default File System ext4

By running df -hT that shows mounted file systems, how can I know if my default FS is ext4? Also as mentioned by one of the MongoDB engineers in this video (@1:13) from M202: MONGODB ADVANCED ...
0
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0answers
22 views

Async synchronization filesystem strategies

I have the following scenario: Several front-end web servers (nginx + load balancer) serving a web app, each one having a local filesystem, to where user uploads are placed temporarily. An external ...
0
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2answers
110 views

how to backup partition layout?

How I can backup(and restore) partition layout of the Disk along with file system types,UUIDs,labels,LVM partitions(Linux LVM) etc, plus with MBRs and VBRs etc but without actual files I want to ...
1
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0answers
48 views

HPOM Java GUI, multiple users connecting to different servers from Citrix sessions on the same server possible?

I have an app (HPOM Java GUI) running on a 2008 R2 Xenapp 6 box that employs client certificates for encrypting connections to the HPOM server. I have 2 different sets of users who will use this app ...
3
votes
0answers
21 views

How can I introspect the “shared subtree” mount flags for a particular mount?

Under Linux, the shared subtree flags control how a mountpoint is shared with parent and child mount namespaces. These flags include MS_SHARED, MS_PRIVATE, and MS_SLAVE. How can one see which of ...
2
votes
1answer
62 views

“Hot data” and erasure coding: how to know if it is efficiently handled?

It is well known that erasure coding adds extra complexity because of encoding and decoding operations. Due to this drawback, most of cloud services recommend to use data replication for hot data and ...
18
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2answers
2k views

In Linux, why isn't superuser root's folder under /home?

You can create a user that has privileges like root, and it's home directory will fall under /home/username. Why does root get its own folder at the top level of the file system? Is this just ...
1
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1answer
37 views

Rename NTFS file to eliminate multiple periods via batch

I at wits end trying to rename NTFS files that have technically legal, but problematic multiple periods in my Windows 2012 Server share Files are dropped in a share that look like this: ...
21
votes
7answers
19k views

How to workaround the NTFS Move/Copy design flaw?

As anyone that has dealt with file server permissions is aware, NTFS has an interesting design feature/flaw known as the Move/Copy problem. As explained in this MS KB article, the permissions for a ...
1
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1answer
65 views

MongoDB: insert operation fails but disk is free

I've seen the strange behavior of my server and first of all I looked at log file /var/log/mongodb/mongodb.log. There I saw the next lines: Wed Jan 7 16:33:31 [FileAllocator] allocating new datafile ...
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1answer
94 views

XPEnology - Filesystem

I've looked all over but I can't seem to find a straight answer. I have 4 NTFS drives with data on them - are these compatible with a fresh install of XPEnology? The aim is to obviously share the ...
4
votes
3answers
283 views

rsync many small files with long filenames takes a lot of bandwidth

I have a file storage server which stores files on disk using the file's sha256 hash as the filename, along with the file extension, and in three levels of directories, e.g. a PDF file with sha256 ...
0
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3answers
873 views

virtfs is too big!

I am using cPanel hosting. I rent 20GB and /home/virtfs is taking up nearly 10GB. I read that using jailed shell accounts could be responsible for large virtfs file. Most of the user accounts have ...
1
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2answers
148 views

How to delete and reuse ZFS filesystems inside a Pool

I have this ZFS Pool. NAME STATE READ WRITE CKSUM app ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 c1t2d0 ONLINE 0 0 0 ...
1
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2answers
143 views

How to migrate a ZFS filesystem to use compression?

Question at the bottom. I have several ZFS file system I would like to use ZFS compression, but since enabling the compression will only affect new data written to the file system, I would like to ...