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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10tb file storage design question on media website

I have a fairly busy media website where MP3 audio files are uploaded by members and streamed / downloaded from 2 Windows servers which are load balanced at the moment...both servers simply mirror ...
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What are the best options for a root filesystem hosted on SSD under Linux

I'm working on an embedded system which is going to be booting and hosting it's rootfs on an SSD disk. We are currently looking at using Intel X-18M SSDs. The file system structure will have a fairly ...
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Is it possible to shrink an JFS filesystem?

In the past it was not possible to shrink a JFS. Has that changed in the meantime, is somebody working on it, is it planned ...? How would it be possible to replace JFS with another FS without having ...
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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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Mounting Single San Drive on Multiple Hosts

I'm not sure exactly how to ask this, but here goes. We have a san. Within the san, we have the ability to connect a single volume to multiple systems as a raw disk. The Servers themselves would see ...
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171 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: ...
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1answer
481 views

The impact of a high directory-to-file ratio on XFS

We're building a product that is likely to generate very large XFS volumes, and I'm trying to discover the scaling bottlenecks we're likely to run into given the architecture. As we manipulate files ...
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2k 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 [/home/user/...
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1answer
793 views

“No space left on device” error when writing certain session filenames

I have some filenames (session files) that can't be written ("No space left on device"). Other filenames (same directory) are fine. Disk is not full. The filesystem is ext3 PHP is giving an error ...
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1answer
8k views

Deleting blocked caused by thumb.db on Windows 2008 as a file server

I have a Windows Server 2008 which I am using to store media files. I am accessing this server via a mapped drive from my Win 7. Both are x64. When trying to delete folders, rename, move I get the ...
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4answers
3k views

What is the best filesystem for Maildir folders storage? [closed]

Projected volume size is around 1TB,. Filesystem should perform fast when dealing with LOTS of files in every folder. Snapshots support would be great, for backup purpose, but not compulsory. It ...
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4answers
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EBS+RAID10+XFS slower than EBS+RAID10+EXT3 using MySQL?

We're currently using EC2 with 16 EBS volumes in RAID10 configuration for our MySQL data. I know some people don't recommend to put EBS volumes to RAID but that's not what I'm concerned about at the ...
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3answers
486 views

The use of external journals on SSDs

Certain journaled file-systems do suffer from performance penalties for hosting the journal on the same drive as the filesystem itself. Using an external journal can improve write speeds. With the ...
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4answers
8k views

OpenFiler versus FreeNAS for Mac OSX environment

I'm a photographer and I have a requirement find a better method of storing my photo library. Currently I use a Macbook Pro and 6 external drives connected via USB2 or FW800. They are divided up in ...
3
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2answers
308 views

What filesystem comes closest to matching NTFS for support of ACLs, and highly-granular permissioning?

It seems that most other filesystems handle the basic *nix permissions (ugo±rwx), with maybe an addition here or there. Or can be "made" to handle ACLs through the use of other tools on top of ...
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2answers
733 views

Most suitable filesystem for virtualized Linux system?

Is there a clear winner in the filesystem area? As in, does some filesystem perform significantly better in a virtualized environment such as VMWare or VirtualBox? Is there more or less disk space ...
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2answers
2k views

Advices for filesystem choice and tuning on SSD?

What is your favourite filesystem on SSD disks, and why? I'm asking because on my Acer Aspire One with 8 GB SSD with ReiserFS it takes ages to boot after an unclean shutdown, so I'm probably missing ...
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2answers
3k views

Resize2fs at 81h and counting

Setup: 12x 1TB drives in a RAID6 (MDADM) crypt-setup running ontop of MDADM LVM running on the crypted drives EXT4 on the LVM Background: I added a new drive to the RAID (increasing from 11 to 12 ...
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4answers
1k views

Filesystem permissions on Unix

If I have a folder specified as not-readable. Are all folders under it also non-readable? For example, my shared hosting home account directory is not accessible to other accounts, so, are all folders ...
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1answer
85 views

Gearman writing “Too many open files” into the log. Disk space issues

We're running a service that makes screenshots of URL supplied and posts it to our S3 bucket. Similar to manet, but our custom coded nodejs app. We don't store the screenshots on our local hard drive. ...
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4answers
1k 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 (...
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8answers
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Allowing access to company files accross the internet

The premise I've been tasked with finding a solution to the following scenario: our main file server is a Linux machine. on the LAN, users simply access the files using SMB. each user has an ...
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4answers
2k views

UNIX/Linux sparse files — in use? How do you handle these?

Since the beginning the standard UNIX/Linux systems support sparse files, this is a file which contains unused space that is unallocated until needed. To review, to generate via a C program: create a ...
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3answers
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Root file system is full and I need to install additional software.

I am trying to install to install EPEL Repository on CentOS 5.7. I still have lots of space available on my hard drive. /dev/sda2 3.9G 3.9G 0 100% / /dev/sda11 17G 2....
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UNEXPECTED INCONSITENCY run fsck manually redhat

I erroneously restarted my server before completing a filesystem resize. Here's the command that ran successfully before restarting: lvresize -L -400GB /dev/mapper/vg_yavin-lv_home At boot, I get ...
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2answers
972 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 ...
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2answers
500 views

VMWare ESX 3.5 Input/Output Error

I'm using Vmware ESX Server3.5 for running our Server VMs. In one of our datastore, the partition is used 100% and Its stopping the VM to power on. /vmfs/volumes/504a6db7-97ab1f09-f958-0024818a4940 ...
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2answers
311 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 ...
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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). ...
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2answers
469 views

ZFS: Best-practices doc state: “On systems with 1,000s of ZFS file systems…”?

The docs state: "On systems with 1,000s of ZFS file systems, provision 1 GB of extra memory for every 10,000 mounted file systems including snapshots." What does that mean - how do these people use ...
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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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1answer
214 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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3answers
193 views

Appropriate network file system for huge (5+ Gb) files

I've got a number of servers used for HPC / cluster computing and I noticed that, given the fact that part of the computations they run use huge files over NFS, this causes significant bottlenecks. I'...
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3answers
533 views

Force ID of user created by apt-get

Context: I'm automatically installing postgresql-9.1 on an Ubuntu server with apt-get. This creates the required postgres user. The Postgres data is on an external volume that survives reinstalls. ...
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1answer
1k views

The file system structure on the disk is corrupt and unusable - SBS2003

I'm getting the following error all the time on a clients SBS2003 box. The server is a Dell PowerEdge T300. I've run the Dell diagnostics on the SAS controller and both drives, and everything comes up ...
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3answers
194 views

Why there shouldn't be too many files in one directory that serves just static web requests?

This might be a very general question but I really like to find some detailed answers or clues. I am discussing this with a friend, trying to convince him to put more than 300,000 files from one ...
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3answers
814 views

Filesystems for webserver with SATA and Solid State disk,

We have just ordered a new webserver with 120 Gb solid state disk and a SATA disk. I am trying to plan ahead what sort of filesystem to use. This system will be running Linux, Apache/Tomcat to host ...
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3answers
168 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 folder....
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3answers
296 views

Avoid write on a mounted loopback device to be propagated

I have a device that mounts its root file system using NFS. On my NFS server I have a file representing the device's file system, namely target.ext2, which I mount on the appropriate /export directory....
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1answer
69 views

Where the website files could be located?

As we know there are multiple locations such as : /var/www/vhosts /home/user When should we use each of the above (or other) locations? What is the difference between them?
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1answer
583 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 ...