The filesystems tag has no wiki summary.
1
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2answers
41 views
Where to get network-files for centos?
I made a big mistake. Instead of typing :
rm -rf /etc/sysconfig/network-scripts/ifcfg-eth0
I typed:
rm -rf /etc/syconfig/network-scripts
Can anybody help me to repair this mistake?
Thanks in ...
5
votes
3answers
77 views
Why won't tcpdump write a pcap file?
In the process of debugging a python irc bot that can't seem to connect, I thought "I know, I'll just tcpdump it and see what it's doing." So I ran tcpdump like I usually do and it says it's captured ...
2
votes
1answer
26 views
Modify XFS filesystem creation parameters during kickstart installation
I'm streamlining the kickstart process for a series of EL6.2 (RHEL, CentOS, SL, etc.) systems. I'd prefer to use XFS over ext4 for the growth/data partition. However, I'd like some control over the ...
5
votes
3answers
74 views
What are some shared-disk filesystems people have successfully used with iSCSI?
The setup looks something like this.
The goal is to have multiple computers mount a single LUN from the iSCSI target. Ideally mounting read/write and with ACL support.
The servers are running ...
0
votes
3answers
88 views
Performance gains of putting Windows pagefile on separate partition (same disk)?
I am making a drive image that will be deployed to several computers, and I'm tweaking it for performance. It is a Windows XP image.
Considering there is only one hard drive, will the machine gain ...
2
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4answers
45 views
Is there a way to log failed file operations in a linux box?
I wonder if there is a log facility in linux that can be enabled to record failed file operations such as a failure in creating a directory due to permissions or in opening a file for writing so that ...
0
votes
1answer
43 views
Iozone record sizes and real-life purpose
I am puzzled about Iozone record sizes. My questions are:
how to find out what record size my application uses?;
what is the correlation between Iozone record size and the filesystem Block Size?;
...
-1
votes
1answer
106 views
EXT3 vs EXT4 vs XFS
Recently I read a lot about "new" file systems.
I checked some benchmarks that show MySQL working faster on EXT4 or XFS (and some other FS).
I also "found" that XFS and EXT4 are included in CentOS ...
1
vote
1answer
56 views
FS/disk snapshots (like LVM) with shared cache
On Linux, is there a way to take copy-on-write snapshots of a file system (at the FS, block device, or whatever layer), such that if a copy and another copy/the original are concurrently mounted, the ...
4
votes
4answers
266 views
Linux: how many disk I/O does it take to read a file? How to minimize it?
According to this paper on Facebook's Haystack:
"Because of how the NAS appliances manage directory metadata, placing
thousands of files in a directory was extremely inefficient as the
...
0
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0answers
11 views
Lustre 2.1 clients being evicted due to “lock callback timer”
We're experiencing occasional client evictions on our Lustre
2.1 filesystem which are causing some compute jobs to fail to write
their output. This seems to be traceable to some issue with an
...
0
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0answers
13 views
Synching test unit
As part of this post I was advised to use Unison to keep 2 working copies of the same directory in sync. Since this is intended at a production environment with a certain amount of data (4.5GB) I want ...
6
votes
1answer
52 views
Linux: how many disk I/O does it take to read a file? How to minimize it?
According to this paper on Facebook's Haystack:
"Because of how the NAS appliances manage directory metadata, placing
thousands of files in a directory was extremely inefficient as the
...
0
votes
5answers
66 views
Synching 2 remote folders
We have 2 Drupal servers that read/write to their own copy of the same folder (the sites/default/files folder for those of you who know a bit about Drupal). Those 2 folders should be in sync. I've ...
1
vote
2answers
43 views
Why does chmod(1) on the group affect the ACL mask?
I am trying to understand this Unix behavior (which I happen to be testing on Ubuntu 11.10):
$ touch foo
$ setfacl -m u:nobody:rwx foo
$ getfacl foo
# file: foo
# owner: michael
# group: michael
...
2
votes
3answers
95 views
CentOS Superblock corruption?
I'm on CentOS 5.2 and I'm having a problem booting my two database servers. Our IT department performed a SAN upgrade over the weekend and now I can't boot - they say the upgrade went fine but ...
1
vote
0answers
55 views
How to fix partition table ordering? [migrated]
I was going to install a completely fresh Linux distribution (Mageia) and I saw it as an opportunity to reorganize my partitions. I wanted all my non-Linux (Windows, restore, etc) partitions at the ...
1
vote
1answer
41 views
convert single partition linux install to multiple partitions with read-only root
I have an embeded system which I finally got stable by doing multiple partitions like so:
Disk /dev/sda: 4017 MB, 4017807360 bytes
255 heads, 63 sectors/track, 488 cylinders
Units = cylinders of ...
3
votes
2answers
66 views
Is NFS caching suitable for caching large files (200kb to 50mb?)
I have a 1TB disk on one server that 4 other servers frequently access via NFS to distribute the files over HTTP. I'm seeing a high load on the central server and want to cache these files on the ...
3
votes
1answer
123 views
Filesystem and partitioning for SSDs on Linux
What are the best practices for using an SSD on a Linux workstation?
Specifically, I'm interested in:
What mounts I should put on the SSD and what I should keep on my HDD
What filesystem I should ...
1
vote
1answer
34 views
lvm snapshot: how to get a list of changed, added, deleted files?
i have an lvm snapshot and i would like to see what files have been changed, added or deleted. (Just the file list is sufficient.)
Is there an easy way to get the list?
Thanks in advance for any ...
4
votes
3answers
258 views
What equivalent technologies to Microsoft's forthcoming ReFS exist for Linux/Unix?
With the announcement and write-up of ReFS (Resilient File System) on places like arstechnica, I am curious to know what technology, or technology stack, exists for Linux/Unix for a similar outcome.
...
1
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2answers
57 views
How to share USB drive via NFS on FreeBSD
I'm trying to share USB hard drive with msdosfs connected like this:
mount_msdosfs -o large /dev/da1s1 /mnt/usb
I can see mounted drive:
/dev/da1s1 on /mnt/usb (msdosfs, local)
but when I'm ...
1
vote
0answers
60 views
Where in “/” should extra disks be mounted? [migrated]
According to Wikipedia
http://en.wikipedia.org/wiki/Unix_directory_structure
http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard
extra disks should not be mounted in /mnt/ according to the ...
0
votes
1answer
83 views
Clustered file system on Linux
This is quite a general question but I need some advice on clustering apache linux servers ideally on VM.
I have some apache servers that are being using that are highly used on space (i.e. each ...
-1
votes
0answers
25 views
How to mount a specific file system on a disk image in OSX? [migrated]
I have a disk image file containing multiple file systems, such as HFS (Journaled) in addition to Joliet or UDF. I want to mount whatever non-HFS file system is there. First, I attach the image ...
0
votes
2answers
93 views
Scientific data storage: many small files, one volume or several?
I have about 8 TB worth of 'sample' data with the following characteristics:
each sample: 5-15 GB in one folder containing ~20k files and ~10k subfolders (2000 top-level, 5 sub-level containing a ...
1
vote
1answer
31 views
Restrict access to All Users folder on XP and 7 via GP
I am attempting to restrict access to the All Users folder via GP. Currently I have the setting under:
Computer/Policies/Windows Settings/Security Settings/File System
configured for the ...
0
votes
2answers
42 views
Where to create a subversion repository on a server?
When managing my own servers, I normally keep data such as svn repositories in /srv/svnrepo.
In the organization I currently a part of the SAs have been using /home/svnrepo.
My decision to ...
2
votes
3answers
128 views
How can I add the “noatime” flag to my / filesystem without a reboot
Would the remount command do it if I add the option in /etc/fstab?
Is this this a good idea?
-1
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3answers
71 views
What filesystem should I use for an external USB drive that works for Mac, Linux and Windows? [closed]
At home I have multiple operating systems, Linux (debian), Mac OS X Lion and Winders 7. I have a large USB drive that I want to use to backup/transport files. What filesystem should I use that will ...
8
votes
6answers
59 views
Track, save and revert file system modifications made by a program under Linux
I'd like to be able to, when a program such as an installer is ran, track the list of the modifications made to my filesystem so that I can revert them afterwards.
EDIT: This concerns a non-packaged ...
0
votes
0answers
39 views
are there Isilon-specific setups that can cause directories to go missing?
We have had several entire directories go missing off of an Isilon NAS. The IT people seem to be at a loss as to why this is happening, and with no logging of user commands we cannot disprove an rm ...
1
vote
1answer
24 views
Check file modification on two servers
If I have a file namely /etc/file.cfg on server A and server B. How can we check whether the file on Server A is newer than file on server B ?
If it was on a local machine then we would have used ...
2
votes
3answers
109 views
max files per directory in ext4
I manage an application that contains a filestore in which all the files are stored with the filenames equal to their md5 sums. All files are stored in one directory. Currently there are thousands, ...
0
votes
1answer
34 views
/dev/root not found at the time of booting Cent OS 5.7
Initially I got the error /dev/root not found while booting Cent OS 5.7. I knew the issue at it was because of wrong entry in /etc/fstab which was /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 Here ...
1
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2answers
57 views
Benchmarking disk performance on large-memory systems
I need to produce some comparative filesystem performance metrics for our virtual hosting environment. Specifically, I need to look at the difference between NFS and iSCSI and at the performance ...
3
votes
1answer
223 views
Read/write access for passthrough (9p) filesystems with libvirt/qemu?
I have recently started experimenting with the support for passthrough filesystems in recent versions of KVM/QEMU/libvirt. Making the filesystems available for read access has "just worked", but I'm ...
0
votes
2answers
54 views
linux boot issue- VolGroup issue
I have cent OS with XEN installed on a blade server. After installing Cent OS I changed its Volumegroup from VolGroup00 to VolGroup01 using command 'vgrename' as I needed to access the Volgroups of ...
3
votes
2answers
375 views
1
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3answers
92 views
Linux Filesystem Organization
As a recovering, long-time Windows user, I've been trying to clarify my understanding of the "proper" place to put things in Linux (or UNIX too I guess but I rarely work in a non-OS X UNIX and Mac OS ...
0
votes
1answer
63 views
Connecting to Redundant NFS Servers (Load Balancers or Round-Robin DNS?)
In a typical NFS setup with redundant servers (multiple boxes), do people use a load balancer or round-robin DNS to achieve a single connection vector for clients?
Is there a better way to do this ...
0
votes
1answer
68 views
NFS Connection Configuration Between Multiple Clients/Servers
I have several client computers (PCs) that need to connect to DRBD-replicated NFS servers. With NFS, I know you need to have the connection configured on both machines (e.g. client -> server and ...
0
votes
1answer
41 views
Sync Local Folder to FTP
I'm looking for an app I can put on my local server that will take files from C:\Source to a folder on my remote FTP Server every hour.
I was looking at rsync and it looked perfect until it told me I ...
1
vote
2answers
120 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 ...
0
votes
2answers
120 views
Program Files (x86) redirected? win 2008 R2
I'm wondering if c:\Program Files (x86)\ is redirected somewhere else under win2008 Server R2.
The thing is, a service is supposed to add/change fields in the settings file stored in Program Files ...
2
votes
1answer
277 views
High Availability NFS Server (Heartbeat/DRBD) long hang on clients when takeover occurs
We have a High Availability NFS environment using DRBD, heartbeat and nfs exposed to clients (Simular to the following https://help.ubuntu.com/community/HighlyAvailableNFS ). This seems to be a ...
2
votes
1answer
56 views
double mount check with ext3
I have two nodes connected to a SAN, and I want to be able to mount an ext3 partition on node B when node A goes down.
I know I could use a shared filesystem, but for simplicity and performance I ...
0
votes
1answer
156 views
VirtualBox: vboxsf filesystem wrongly detected as readonly?
I have VirtualBox (Windows XP host) running a CentOS 6.0 virtual machine, with one shared folder.
Here is the list of mounted devices:
[root@localhost ~]# mount -l
...
www on /media/sf_www type ...
0
votes
2answers
57 views
How to allow multiple people to change mtime -timestamp of a file through sftp?
I have a directory that multiple users have access to. They change, upload, and delete files in the directory. They all belong to the same user group. The files in the directory have access rights of ...
