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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debian stable raid autogrow filesystem database

I need to setup a debian stable system meeting the following needs: Hard disks should be mirroring : Raid 1 Filesystem(s) should autogrow if possible (just in case we replace one hdd with a bigger ...
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36 views

File system with read/write logging by user

Is there any file system - or monitoring tool - which logs which users have read and written which files? Something like this: 2014-01-21 13:45:45 john 12939 /users/john/hello.txt write ...
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159 views

Storing duplicate files efficiently on linux

I host a lot of websites and our system makes it easy to duplicate items in these sites which is handy, but leads to lots of duplicated (and potentially quite large) files. I was wondering if these is ...
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Directories converted to files

Our development team went to start HTTPD and got this: Starting httpd: (20)Not a directory: httpd: could not open error log file /etc/httpd/logs/error_log. Unable to open logs ...
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726 views

Why is Ubuntu/Linux /proc/mounts lying to me?

I've got a broken HDD for the rootfs - this probably caused the filesystem to be mounted read-only... however /proc/mounts still says it's mounted rw: $ cat /proc/mounts rootfs / rootfs rw 0 0 ...
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54 views

Choosing a zpool size?

Is there a rule of thumb when to create a new zpool instead of expanding the current? Right now I have 100TB and can either expand with another 100TB or create an extra.
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377 views

Which block sizes for millions of small files

I have 2x 4TB Disks in hardware RAID1 (it might be a LSI MegaRaid) on Debian Wheezy. The physical block size is 4kB. I'm going to store 150-200 million of small files (between 3 and 10kB). I'm not ...
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3answers
175 views

File Monitoring on Ubuntu 12.04 Server [closed]

I´m looking for a simple way to monitor critical folders for changes to recognize hacks on a ubuntu 12.04 server. After Days of reading How To´s on different programms I´m a bit confused which way to ...
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146 views

File system benchmark that generates I/O from distribution of file sizes [closed]

I am looking for a file system benchmarking tool to test CephFS. This benchmarking tool has to: Generate a set of files (call it fileset) following a particular distribution, e.g., gamma, empirical, ...
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3k views

Apache Tomcat setting Max file upload size

I am implementing a Grails/Groovy web app, I want to limit the user's file upload size, I don't want someone uploads a 10GB file to my server. What I figured out was that most approaches to calculate ...
11
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4answers
998 views

last time a filesystem was checked?

What command can tell me the last time that a filesystem was fsck'd? A date would be nice, but I'd settle for the mount count since the last fsck. I've looked all around for this in fsck*, lsattr, ...
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37 views

Updating software on Remote Desktop Services

We have Remote Desktop Services setup under Windows 2012 R2 in session mode, meaning we are not virtualizing machines. The software we are rolling out is our own, so we can make sure it plays nice in ...
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132 views

could fsck -Af -M cause corrupt filesystem?

Last night my server encounter "Read-only file system" error. So then I ran "fsck -Af -M" to trying to repair but no use, these are output: fsck 1.39 (29-May-2006) e2fsck 1.39 (29-May-2006) /: ...
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1answer
41 views

Filesystem on a block device that now has another name?

Here's the scenario: I'm attaching a disk to a KVM guest VM, lets say 'vdb' Now I create a partition on 'vdb' and format it as ext4 (vdb1) I mount 'vdb1' and write some data I unmount the 'vdb1' I ...
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2answers
159 views

Expandable Linux filesystem w/ redundancy & support for different drive sizes?

I did a bit of research already and didn't come across any filesystems so far that have the following features: Expandability, Redundancy, and the ability to utilize the full capacity of different ...
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703 views

Root filesystem filling up, no big files

So im a very new sysadmin, just got out of school and doing my internship. Only problem is that im the only sysadmin in the place and no one to show me the job. Anyway, it's a very small company, ...
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2k views

ERROR 1307 (0x0000051B) - While copying with Robocopy - None of the known sollutions work

I'm trying to copy a folder from one harddrive to another using the folowing robocopy options: robocopy "H:\Source" "T:\target" /E /COPY:DATSO /R:1 /W:1 /DCOPY:T /Z /LOG:T:\Belfirst_copy.log /NP ...
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1answer
2k views

How often should I defrag ZFS pools?

I ZFS scrub once a month which takes ~24 hours for the 72TB. For what I can find about how often I should scrub is: very busy pools, once per week not so busy pools, once per month or run a scrub, ...
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315 views

File base permissions are 666, why and is this a configurable value? [closed]

It is specified in various documentation on the net that linux/unix file base permissions are 666 with regards to how umask manipulates. This is also relevant with regards to the fact that default ...
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2answers
321 views

FS for many small files, mostly reads?

I need a direction since all the blogs/benchs seems to contradict. Goal: Having a lot of small files on FS in a directory tree fashion similar to this AB/CD/EF... Two size groups : G1 : 10-20 kB G2 ...
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1answer
142 views

How do NTFS permissions become improperly ordered?

I have some files on a network share and they were read-only accessible to users. I had set the permissions to provide full rights to all domain users - when I checked the main folder, this was still ...
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1answer
466 views

Best Linux filesystem for sparse files?

In some filesystems, blocks used when allocating new files are used to avoid reuse. When used for sparse files, such setup would lead to the file size constantly growing. Is there a filesystem that ...
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337 views

Partition required for ext4 filesystem?

I read on the arch wiki that it is not recommended to partition a disk before creating the ZFS filesystem on it. I searched but did not find any such statement about ext4. So my question is: can I put ...
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104 views

du, df and ls report wrong free / used space [duplicate]

We have an Ubuntu 12.04 server running on a VMware ESXi host, with multiple partitions, running Zimbra 8 (mta/ldap only). One of partitions is a 30GB partition mounted as /opt/zimbra/data. I had a ...
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94 views

How to allow an arbitrary group to mount a file system?

As far as I understood from the mount man page, by default only root is allowed to mount a filesystem. Filesystems with either the user or the users option can be mounted by any user. The owner and ...
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112 views

Removing Nested Folders where permissions are invalid and folder names are to long

I appears we have become a victim of not using the /XJ in a robocopy command, and we have ended up with a mass of nested folders. We want to get rid of them, but we can use the normal methods of ...
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1answer
89 views

Does NTFS / Windows as OS performs checksumming on file movement operations by default?

That's what I can't find Does NTFS / Windows as OS performs checksumming on file movement operations by default? alike ZFS or somehow else...
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1answer
62 views

Using Volume Shadow Copy to Identify Updated Files

I have folders in my server with over 60GBs of data across ~160,000+ files. The files in this folder change regularly. I need to be able to make a backup copy of the files in this folder at a given ...
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1answer
98 views

How to purge strange files in lost+found

somehow i did end ip with a 'lot' of corrupted files in lost+found directory (centos) and I can't get rid of them. Any idea ? [/lost+found]# ls -la total 196 drwx------ 5 root root ...
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1answer
171 views

How to organize millions of static files to serve efficiently over the web?

I'd like to create a service to serve several hundred thousand smaller files (from 5kb to 500kb, mostly around 10-100kb). Think of it as a kind of gravatar.com which serves those little avatar pics on ...
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1answer
73 views

Long delays in local server folder acess - Server 2003

I have a 2003 server which is acting as file server, with a 2-disk 1 TB RAID-1 (software RAID, unfortunately). This has been working fine. Recently it occured that from time to time, when trying to ...
2
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1answer
306 views

Is file system alignment required on hardware-raid with SSDs?

We are building a raid-10 with LSI 9260-4i + 4 x Intel DC S3500 SDDs. Partition alignment From what I understand I need to start fdisk with -H32 -S32 or Ted T'so variant with -H224 -S56 in order to ...
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51 views

Can not move SQL Primary File

In the process of moving/upgrading old SQL server 2005, I need to move some sharepoint PWA datafiles. After detaching the database from the files, I am trying to copy/move the DB files from their old ...
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120 views

Monitoring file system activity of a process

Under Windows 7, how can I monitor all filesystem activity made by a specific process? Goal is to identify, which and when config files of a server process get loaded.
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1k views

Write once, read many (WORM) using Linux file system

I have a requirement to write files to a Linux file system that can not be subsequently overwritten, appended to, updated in any way, or deleted. Not by a sudo-er, root, or anybody. I am attempting to ...
3
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1answer
177 views

Choice of distributed filesystem for intensive reads and writes

I have a series of servers (HP ProLiant, 34 servers) each of which with 500 G of hard drive space. These servers are part of a computational cluster which runs processes that roughly fall into two ...
11
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1answer
6k views

How can I recover an ext4 filesystem corrupted after a fsck?

I have an ext4 filesystem on luks over software raid5. The filesystem was operating "just fine" for several years when I was beginning to run out of space. I had a 9T volume on 6x2T drives. I began ...
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1answer
96 views

Does exportfs disrupt users already utilizing those filesystems?

I need to modify a servers /etc/exports file to export to an additional host. After modifying this file, for it to take effect (i.e. for the additional host to have access to the designated ...
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2answers
93 views

Is it a good idea to take onsite/offsite backups of server images?

Assuming a non-virtualized environment it a good idea to take actual images of servers (using something like Acronis True Image) and store them on\off site? Backing up data is great but I feel it ...
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93 views

low priority linux filesystem

Does anybody know of a some sort of (virtual) filesystem that will run as a low priority i.e. All other regular disk activity will take priority? The reason for this is an application I am developing ...
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2answers
9k views

How to find cause of main file system going to read only mode

Ubuntu 12.04 File system goes to readonly mode frequently. First of all I have read this question file system is going into read only mode frequently already. But I have to know if it's not caused ...
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74 views

Program complains not enough disk space even if the disk space exists

I have an EXT3 partition mounted in ordered data mode. If a power failure occurs when a program is creating files on that partition, I see that space usage reported is normal and I don't see any ...
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930 views

Fedora, fsck fails at boot

I'm facing a problem in my server during the startup. This is my actual configuration: 320GB each. Raid1 -> /dev/md127. Working. /dev/sda /dev/sdc 1000GB each. Raid1 -> Use to be /dev/md126, ...
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1answer
37 views

Determine filesystem type without partition table

I have an old 16GB SCSI hard drive with some important files I'd like to backup. The problem is cfdisk doesn't recognize the hard drive, it says the partition table is zero. Another problem is, I ...
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275 views

Distributed filesystem for storing temporary files

We have a cluster of web servers that currently stores temporary files (that have been uploaded by users) on a central shared filesystem. The limitation being that anytime the server containing the ...
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576 views

Direct I/O on Linux

I'm trying to enable Direct I/O on /opt (/dev/sda6, ext4) on Linux Mint 13. What I'm trying is: mount -o dio,rw /dev/sda6 /opt as root. The system responds with: mount: wrong fs type, bad ...
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3answers
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zfs on a single device: what happens when a file is corrupted?

It is written everywhere that ZFS is helpful even if you only have one physical device, because it will tell you about data corruption due to bit decay and such. However, can it actually address such ...
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How to rearange disks with a new SSD

Here is the problem: I have a Debian server with only 4 disk bays. At the moment there are 4 x 1GB SATA disks in software RAID 10. I'd like to swap one of the SATAs with a 1GB SSD disk and move the OS ...
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1answer
42 views

What allows a mail server to operate faster or handle more mail? [closed]

I realize that this may be better suited for StackOverflow.com instead, however as I'm not much of a developer, I worry those answers may be way too developer-centric. Although, I would like some ...
6
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1answer
1k views

In NTFS, what's the difference between sector size, block size and cluster size?

For example, I have a volume with the following info extracted from ntfsinfo: $ sudo ntfsinfo -m /dev/sdb1 Volume Information Name of device: /dev/sdb1 Device state: 11 Volume ...