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.

learn more… | top users | synonyms (1)

1
vote
3answers
136 views

Do read operations work on ext3 filesystems when the filesystem is full?

If an ext3 filesystem has no space left on it, will a read operation still succeed?
1
vote
2answers
3k views

How much performance is gained from setting NtfsDisable8dot3NameCreation = 1?

You can tune NTFS with different parameters in the registry and an TechNet articles states that you increase file performance by setting NtfsDisable8dot3NameCreation to 1 in the registry. In real ...
2
votes
7answers
2k views

What file system is better for a Linux mail server?

I have a mail server using maildir format, with about 100GB of data, and several directories have over 20000 files each. I'm currently using ext3, and I noticed that it's a bit slow sometimes. So I'd ...
10
votes
5answers
978 views

Tips on efficiently storing 25TB+ worth million files in filesystem

Say you are confronted with 25 TB worth uncompressed log files and you have at your disposal an array of 20 commodity boxes with collective free storage capacity of 25 TB. How would you store these ...
1
vote
2answers
330 views

Can I make an ext3 filesystem recognize (and use) the entire partition?

Using gparted and partimage from SysRescCD I recently made a backup image of the partition containing my Ubuntu installation, deleted all partitions except for the original Windows partitions ...
4
votes
1answer
2k views

Does increasing the journal size improve performance for ext4 filesystems?

There is an article on linux-mag which says that increasing the size of the journal on ext4 filesystems actually improves filesystem performance for very large partitions. I'm wondering if anyone ...
0
votes
3answers
160 views

Filesystem cache accessible via HTTP?

After searching the web for hours and couldn't find what I was looking for, I thought someone here might have an idea ;-) I'm looking for Linux a program that will cache in memory a designated ...
1
vote
2answers
3k views

How to “align” a Linux file system with a SSD?

I'm interested in getting a dedicated server with a SSD, probably Corsair Force series CSSD-F120GB2-BRKT. It'll be an Linux server, most likely running XFS (but I'm open to other alternatives). ...
2
votes
4answers
345 views

Does number of hardlinks to a directory correspond to the number of subdirectories in it?

When displaying directories using ls -l, their number of links (the second field in the output) is at least two: one for the dir name and one for . $ mkdir foo $ ls -l total 2 drwxr-xr-x 2 user ...
0
votes
2answers
332 views

most efficient way to expose storage to windows on network?

using Nexenta or Opensolaris...on server grade h/w: SAS disks + 1GB layer3 switch: CIFS would only do 10 MB/s. Adding more servers would bump this to 10 MB/sec per server? dont know about NFS ...
0
votes
3answers
572 views

What is the best filesystem for log files on Linux?

What file system would you choose for your /var/log directory ? Upd: this is for a typical medium-load web/mail/ftp server. ext3/ext4 works just fine, but I have been thinking of other filesystems ...
3
votes
2answers
721 views

Do access logs (from nginx) slow down a website?

Does it slow down a website if your webserver (in my case, nginx) is writing to an access log? I'm mostly wondering if it's noticeable. Plus, what's the point of knowing the user agents / ips that ...
3
votes
3answers
886 views

Best remote mounted filesystem based on S3

I need to know what the best (read: highly performant and fault tolerant) filesystem solution based on Amazon's S3 is. I have looked a s3fs, but I notice that it has not been worked on for a while ...
0
votes
2answers
884 views

Is there away to get around shared folder resource limits?

We have a situation where we need to share out a shared folder on a PC running WinXP to more than 10 users. Apparently there is a limit to the number of connections for a shared folder(?). To add a ...
0
votes
2answers
74 views

directory naming explanation

Where can I find an explanation of directory names used in Ubuntu (the whole tree)? Why etc? When do I put my files in /usr/local when in /home/usr when in /usr/local/bin and when in /var/lib/ or ...
1
vote
3answers
214 views

Linux FIle Compression

Has anyone used a Linux FS that supports transparent compression? We'd like to mount a partition where all files are compressed and access them through standard POSIX APIs. I know there is an add-on ...
0
votes
1answer
623 views

Mount partition on KVM guest and host at the same time

Is there a way to mount a partition on the kvm host and one guest at the same time? (on linux / ubuntu, no samba suggestions, please)
4
votes
3answers
99 views

How can I tie togeather extra space on Macintosh desktops with a distributed filesystem?

I have access to a bunch of Mac desktops, the hard drives of which are under-utilized. I want to set up a distributed filesystem to gang them together into one large virtual volume. The server has to ...
1
vote
3answers
168 views

How to cleanly dismount an ext3 partition with a small usb distro or other solution

I have a disk that was inside a Nas, that seemed to run to hot and eventually just stopped working(the disk is fine, the nas broke) I don't have a physical machine with linux on at the moment, so I'm ...
1
vote
1answer
566 views

Why does this loopback device creation malfunction?

The stackoverflow people thought this was more appropriate here, I put it there as it is part of a program but I can see their POV, so here it is: At the bottom of the code you can see it failing. In ...
1
vote
2answers
272 views

Why is the total size of my files on Windows 7 more than total disk size?

I have a virtual machine with Windows 7 x64 quest OS. When I boot from PE OS CD and run file manager (Total Commander) I see that the total size of my files on virtual machine is more than total disk ...
0
votes
6answers
2k views

Find files in one directory not in another

Are there any Linux/Unix tools which find all the files in one directory not present in another? Basically I'm looking for diff which works on the output of ls. Short and sweet scripts are also ...
0
votes
1answer
215 views

Unable to write to root partition

For some reason, we are unable to write to my root ext4 partition. Unfortunately I don't have physical access to the computer, and I can't reboot or do anything because it's read only? How can we fix ...
3
votes
2answers
453 views

What Unix command can I use to enforce a limit of 100 files in a folder?

I would like to delete the oldest files in a directory, after a limit of 100 files. In other words, I want to ensure that no more than 100 files exist in the directory, and if a limit is exceeded, ...
0
votes
2answers
773 views

Direction on incorrect /etc/mtab file

I have an mtab file that looks nothing like the fstab file. I'm running CentOS 5.3 on Xen Source and am using HyperVM and Kloxo to administer the VM. Where should I be looking for assistance? ...
1
vote
2answers
2k views

LVM input/output error

When I run the lvdisplay, it showed the following error... /usr/sbin/lvdisplay /dev/sdb: read failed after 0 of 2048 at 0: Input/output error /dev/sdb1: read failed after 0 of 2048 at 0: ...
2
votes
2answers
249 views

Questions regarding the command: “net use * http://myserver.com”

Apparently I'm able to net use * http://servername.com and this concept is completely new to me. Does this mean I'm using WebDAV? What are the security implications? How can I read/write ...
0
votes
2answers
513 views

What should be in /usr/local/bin in Linux?

I have a laptop running linux, and I've installed various bits and pieces into /usr/local/bin. Some software has created subdirectories (e.g. firefox & blender), some has just gone into ...
4
votes
4answers
738 views

What is a Journaling file system?

What is a Journaling file system? Even wikipedia doesn't give much information. Apart from NTFS which other file systems(on Windows / Linux) support journaling and how does it give a performance ...
1
vote
3answers
352 views

linux raid 1 to lvm or not to lvm

I am getting ready to create a (hardware) RAID 1 array spanning three disks. Performance is not key here, just redundancy and ability to recover from data failure. The question: Should I use LVM? ...
4
votes
2answers
1k views

Harddrive issue “read-only”

I'm having an issue where when i mount my partition a few hours later it becomes read-only. Currently i run: fuser -m -k /dev/sdb1 umount /dev/sdb1 fsck -y /dev/sdb1 mount /dev/sdb1 That allows me ...
1
vote
3answers
2k views

Converting NTFS to ZFS (or other)

Are there any benefits of converting HDDs that are running NTFS on a Linux machine to ZFS? Is there a way to do such conversion in Linux without losing the data? What about the stability of ZFS on ...
2
votes
4answers
474 views

Huge directory, not files inside, but directory itself

I have been trying to delete a directory from a centos server using rm -Rf /root/FFDC for the past 15 hours and am having great difficulty. I can't do a directory listing because it hangs the system ...
2
votes
2answers
1k views

Questions for Ext3/4 Features ( dir_index,filetype) and XFS File system Performance

I am developing an applications which reads huge list of directories and check file types using file command and using ext4 file system. When i look into Ext4 , i see it have two interesting features ...
2
votes
1answer
288 views

Performance of Loopback Filesystems

Has anyone done any performance/benchmarking tests on Linux loopback file systems? What has your experience been so far. Is there any serious degradation in performance? How about robustness? ...
0
votes
3answers
1k views

How many subdirectories can a directory have on RH5 Linux?

A program of mine is crunching numbers and depending on results creates a directory which stores all the data. Last night it failed. Mkdir no longer worked. After checking things out I saw that my ...
17
votes
13answers
2k views

How can I visualize hard disk space with millions of files?

We have a hard disk that is 600 Gigs and nearly full. It's been filled up with 18,501,765 files (mostly small 19k images) and 7,142,132 folders. It's very difficult to find out where exactly all the ...
1
vote
1answer
256 views

mkfs fs-options for ext2 loopback device for backup

I'm looking to create a loopback device for local temporary backup storage. This will be used to store ~1000 files in ~20 directories. I understand I'd need to use the mkfs command along the lines ...
2
votes
3answers
881 views

Linux server filesystem issues

I have a vps with file system trouble and the provider has been unable to fix it. If /dev/simfs is missing on a clean install (CentOS 5.5), and not created later, will this cause serious problems ...
1
vote
3answers
3k views

Hard Drive filling up quickly and constantly

We have a few programs that do a lot of stuff with file management and logs. I think one of the programs is filling up the hard drive, but I have no idea which one or how exactly its happening. Is ...
3
votes
1answer
150 views

How to back up a versioned filesystem (e.g. ext3cow)?

I have been looking at versioned filesystems but I can't find any information on how to back them up. If my disk dies and I have to restore from a backup, I want to be able to restore the filesystem ...
1
vote
1answer
725 views

Best file structure for storing 1000s of photos (in different sizes)

I am developing a site that lets people upload images. We resize each image to 4 sizes. We're expecting lots and lots of images and are considering ways to increase performance with regards to the ...
2
votes
3answers
1k views

Always reserve blocks for super user when formatting a file system in Linux? Even for data only partitions?

When formatting a large partition (10TB) that will hold only application data, does it make sense to have 'reserved for the super user' space? 122065906 blocks (5.00%) reserved for the super user ...
1
vote
3answers
901 views

Get open file path from pfiles output

We have detected performance issues in a Solaris 10 process and observed too much writes to descriptor 268 using truss. We don't have lsof at hand, but here is an excerpt from pfiles output: [...] ...
1
vote
3answers
176 views

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 ...
4
votes
5answers
576 views

Which filesystem would you use when you need to share data between linux and windows in dual-boot setup?

On my system i have windows 7 and ubuntu 10.04 installed. I need to share large amounts of data between both OS. My idea is to set up a partition which both system can access and exchange data. Any ...
2
votes
2answers
158 views

HFS theory: What else is there to a system other than a root filesystem?

I'm grokking the HFS linux standard documentation, and I can't move beyond this concept. The concept I don't get can be demonstrated by the following quote: The contents of the root filesystem ...
0
votes
1answer
138 views

How do I export my web-host's (VPS) filesystem to an image to load locally in a VM?

I'm a dev new to sysadmin, armed with root access to a linux box. I want to practice a bit on the configuration in a local virtual machine. What setup would I need to do this? My current idea is: ...
2
votes
3answers
93 views

Delete Files and Folders

Can anyone recommend a utility (hopefully cheap/free) that will allow me to search across multiple cifs shares for multiple file name/types and then delete them? We are running into problems with our ...
3
votes
2answers
515 views

ext4 fs breaking after power outages

I am experiencing quite a typical but strange problem: the hdd is going bust after power cuts on my server. I can feel it huge work done by fsck on startup after the crash, and then my subversion ...