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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zfs-fuse in Ubuntu - ARC cache?

I just set up a file server running Maverick, and created a mirrored zpool of 2 2TB drives. In my prior experience with ZFS, it will use all available memory to cache from the drives... but now I'm ...
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What's the fastest filesystem for developer builds?

I'm putting together a Linux box that will act as a continuous integration build server; we'll mostly build Java stuff, but I think this question applies to any compiled language. What filesystem and ...
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285 views

how to identify file system running on a partition

I am not very clear with identifying the partition type or filesystem residing on it here is what lvscan reports me ACTIVE '/dev/virtualization/vm1' [100.00 GiB] inherit ACTIVE ...
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ntfs general Question

Hey, One week ago I got my Macbook Air [it is wonderful :-)] and as I desired, I installed (using Bootcamp) Windows in addition. I am happy as it works fine and very sweet is that I can access the ...
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What is the best filesystem for backing up on external hard drive?

I have a 1TB consumer grade NAS and I can use whatever file system I please on it. I only plan to ever use it with linux based systems, so windows compatibility is not really a priority. What is the ...
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761 views

linux file system allowing check while in use?

Is there a file system for linux where it's possible (and safe) to perform a file system check while it's mounted read write or which does not need to be checked periodically ? E.g. a file system ...
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354 views

fault tolerant file systems

some filesystems like btrfs and lustre are marked as fault tolerant file systems in : wiki:http://en.wikipedia.org/wiki/List_of_file_systems what's meaning of fault tolerant file system at all? does ...
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Native SMB/CIFS through ZFS or Samba Instead

I was totally unaware of native SMB/CIFS on ZFS. This wiki doc does not mention performance differences. What kind of performance differences exist between the two?
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What is the best filesystem for VMware Server on linux host?

Unfortunately I'm still dealing these days with the deployment of VMware Server 2.0.2 hosted on Ubuntu Linux 10.04 LTS. Internal testing has shown big problems when running on a 64bit host but ...
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486 views

virtualbox, writing to the host system

Does anyone know whether there is a way to speed up writing to a shared folder on the host system. The host is running Ubuntu 10.10 and the guest is CentOS 5.5 and I have noticed a considerable ...
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1answer
357 views

Replicated filesystem and EC2 MySQL

I'm currently investigating migrating our infrastructure over to run on Amazon's EC2 and am trying to figure out the best way to set up a MySQL service. I'm leaning towards running our own MySQL ...
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1answer
1k views

Corrupted XFS and no way to xfs_repair

One of my hosted server has some XFS problems. after the last crash, some of my RRD folders got corrupted. example (sorry, it's in french): # rm * rm: impossible de supprimer « create_rrd.sh »: La ...
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294 views

How to determine how many times an ext3 file system has been mounted

A few months ago I created an ext3 file system on one of my partitions. I received the following message: "mkfs.ext3 /dev/sddx; system will be checked every 20 mounts or 180 days; use tune2fs -c or ...
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6k views

See what files are being written to (like iotop but for files, not processes)

I have a Linux server, and it's doing a lot of disk io. There is one process that is doing most of the disk writes. I found this out with iotop, which shows the processes that are doing disk I/O. Is ...
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183 views

On Linux: Directory takes up more space than the files therein

There's a directory on our fileserver (Ubuntu Hardy) that takes up much more space than the files and subdirectories in it combined. I'm checking the directory size with "du" and file sizes with "ls ...
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45 views

Can I set up the server so that a leading slash in the filepath doesn't go to root?

I'm working on a friend's site, which works fine live, but isn't working on my computer. After tearing my hair out for a while, I figured out it's because he wrote all his links with a leading slash. ...
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1answer
387 views

What could cause a file system to spontaneously unmount or become invalid for a short time?

We've got DB2 LUW running on a RHEL box. We had a crash of DB2 and IBM came back and said that a file that DB2 was trying to access (through open64()) unmounted or became invalid. We have done ...
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542 views

Clustering filesystem for small files

I'm looking for a distributed filesystem which I could use for storing lots of small files (<1MB usually). What I want to get is: 2 servers which have the fs mounted themselves and mirror the ...
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1answer
2k views

Trying to determine the correct number of XFS allocation groups for postgresql server on Linux

I am running a postgres 8.4.5 server on the linux 2.6.33.7 kernel on an 8 disk raid array with an LSI controller. Most of the tables are around 1GB or less. I know that XFS uses allocation groups ...
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848 views

How can I “shadow” the filesystem on Linux?

On a Linux environment sometimes I need to run a script as root which will add/modify serveral files on my fs. Basically I'd like to know exactly which files are modified and how WITHOUT opening the ...
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1answer
119 views

inodes and tree-depth in ext2

I have an ext2 filesystem with a maximum number of inodes per directory (somewhere around 32k), and also a maximum number of inodes in the entire filesystem (somewhere around 350m). Because I'm using ...
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1answer
360 views

Getting QFS for Solaris 10

I am trying to get the QFS FS which comes along with SUN Storage solutions, http://www.oracle.com/us/products/servers-storage/storage/storage-software/031712.htm But the download link on that page ...
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69 views

Delete . files from OpenVMS

I've downloaded with ftp a file which contains too much '.' to a OpenVMS. How can I remove it?
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5answers
856 views

Total disk space used for one directory including it's sub-directories

On a Linux environment. How can I find out the total space a folder is taking. It would like this total to include ALL sub-directories in the total. I don't want a dump of the size of each ...
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4answers
350 views

optimal folder structure for storing 100k files on a USB drive

I need to store 100k files (around 40GB) in a USB drive. Each file has a unique int id (e.g 45000). Option one is to put all files in a single folder: root/ root/1.pdf root/2.pdf root/3.pdf ... ...
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608 views

filesystem compatible with freenas and windows

I'm planning on using FreeNAS (was considering openfiler but freenas seems simpler) for my home NAS box running off ESXI. I have managed to get local sata drives to mount in ESXI ...
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282 views

Compress HFS+ volume on Linux machine

I'm using mkfs.hfsplus to create a HFS+ volume on Linux, but I want to compress it using Apple's UDIF format. It looks like I should be able to use bzip2 to do this, but I can't really tell how. Any ...
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354 views

Keeping folder of files in sync over 3 machines

Morning, Got 3 machines that have user content on them, which I need to keep in sync. This is a 3 way sync. Currently I run rsync but we just don't handle deletes. Have looked at something like ...
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Optimal file system type and mount options for an rsnapshot dedicated drive

We have an external USB 2 drive that we are using as a backup drive for our configuration. We use rsnapshot for the backups. It uses a few standard commands for managing snapshots: rm -rf: deletes ...
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51 views

Not able to delete file from the server?

I've a file called piture-list.php in my website. When I see them through the ftp client it shows two files with different filesizes. as File name filesize picture-list.php 19818 ...
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451 views

Why does Windows XP (during a rename operation) report file already exists when it doesn't?

From the command-line: E:\menu\html\tom\val\.svn\tmp\text-base>ver Microsoft Windows [Version 5.2.3790] E:\menu\html\tom\val\.svn\tmp\text-base>dir Volume in drive E is DATA Volume Serial ...
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directory with 980MB meta data, millions of files, how to delete it? (ext3) [duplicate]

Possible Duplicate: rm on a directory with millions of files Hello, So I'm stuck with this directory: drwxrwxrwx 2 dan users 980M 2010-12-22 18:38 sessions2 The directories contents is ...
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Frequent dirty file systems

Good morning, I'm seeing an issue on a few servers that they are going 'dirty' a lot, around once a month. For example: This was on 11/8: # tune2fs -l /dev/sda7 | grep state Filesystem state: ...
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How long should resize2fs take on a 1TB partition?

I've got a new computer at the university and almost set up everything for myself on it when I've noticed that the previous user of the machine used a huge 1TB ext3 partition only. I usually keep ...
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312 views

way to roll back a large file renaming/move action

Seems like maybe a programming question, but my experience has been that admins are the right crowd for this? A. I have about 10,000 files that are just enumerated and all in one directory - ...
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78 views

Linux web server shared hosting file errors

I'm using a shared hosting to host my website and have some problems with files from time to time. First, one of my file (php) was missing a part of code (nothing to do with hackers just a random ...
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129 views

Cost of storing many files on a fileserver

I need to store a lot of data contained in SQLite databases on a file server. I have the opportunity to split the data up into many files. This means that there is less risk of a large part of the ...
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1answer
511 views

MDADM Array Being Limited to 2.0TB

I have an MDADM array with four 1TB disks in a RAID5 configuration. Here's the relevant part of mdadm --detail /dev/md1: Version : 00.90 Raid Level : raid5 Array Size : 2929537920 ...
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654 views

Simulating slow filesystem

I'd like to run some test on my system and for this I'd like to simulate a slow files system. Are there easy options out there? (an idea that I have currently would mount something over TCP, even if ...
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ZFS alternative for Linux?

I'm running OpenSolaris with ZFS for my main fileserver. I originally went with ZFS because I heard so many awesome things about it: Automatic disk spanning (zpools) Software RAID (RAID-Z) Automatic ...
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581 views

What are the maximum number of files/directories allowed per directory in common Linux FS?

It is known that ext2/ext3 FS have a rather low limit of about 32k files/directories per directory. It looks like ReiserFS is limited in practice by the r5 hash function which allows about 1 200 000 ...
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595 views

Shared storage for web cluster

Have a big question about shared/clustered/distributed file system for storage. It will shared storage for shared web hosting (web files + maildir) and OpenVZ containers storage . Have any one working ...
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195 views

Recover overwritten filesystem

I made an oopsie- insofar as a filesystem with important data was overwritten as an LVM volume. I never actually wrote any data to the disk though, only hosed enough of the partition table to mark it ...
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899 views

NTFS allow Read/Write/Modify, but not Copy

Is it possible to allow users to modify and read files/folders but not copy them to other locations? Problem is I have a folder that users need to read and modify files in, but I don't want them ...
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2answers
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How can I benchmark Linux file systems on a SAN?

I would like to do a benchmark of our file systems, stored on the SAN. But the SAN is backed by a lot of cache (only 10 to 20 percent) is used, so if I do some testing, result won't be realistic. ...
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73 views

Managing a large amount of folders & files (Digital asset)

I have a large heap of files containing photographs, some documents of info about the same photo , a few .psd files, a few .tiff files, all related to the same photograph or information. I want some ...
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It is XFS reliable? In case of a power gone off is xfs riskier that ext3 in data corruption/safey?

I have been having some electrical issues,mostly power going out suddenly for a few months,and although ups solve the thing mostly. But still i am worried about filesystem corruption,and data lost. ...
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Is it possible to make a USB port provide access to a file system?

This is a weird one. Allow me to clarify, I have a Debian Linux file server - and I need to access some files from it. Usually, I would just use a network for this (wifi, ethernet, etc) but ...
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How to list content from a tar file without recursion?

I've a tar (gz, bzip) file and want to see its content, but not recursively. This is: The "first level" in the file. I already know how to see content: tar -ztf file.tar.gz But it's recursive!! ...
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Filesystem is read-write but acts like read-only… remounting fixed it?

CentOS 5.5 I just came across an instance where my /storage directory was supposedly a read-only file system. I get the error: mkdir: cannot create directory `test': Read-only file system df: ...