Questions tagged [nfs]
Network File System (NFS) is a network file system protocol originally developed by Sun Micro systems in 1984, allowing a user on a client computer to access files over a network in a manner similar to how local storage is accessed. NFS, like many other protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC) system. The Network File System is an open standard defined in RFCs.
1,874
questions
105
votes
8
answers
692k
views
Which ports do I need to open in the firewall to use NFS?
I'm running Ubuntu 11.10 - setting up NFS to share a directory among many other servers. Which ports are required to be opened on the firewall?
- 1,163
73
votes
5
answers
496k
views
How to properly set permissions for NFS folder? Permission denied on mounting end.
I'm trying to connect to an NFS folder on my dev server. The owner of the folder on the dev server is darren and group darren.
When I export and mount it to my Mac using the Disk Utility it mounts, ...
- 957
57
votes
4
answers
311k
views
Mapping UID and GID of local user to the mounted NFS share
I have a server with NFSv4.
I am mounting contents of the home folder of remote user to local host.
Able to read and write contents, but when I am checking ownership of files at the mounted volume ...
- 673
48
votes
3
answers
85k
views
.nfsXXXX files appearing, what are those?
I have an application running (on RHEL5) that streams data onto an NFS share. Recently, I saw a lot of .nfsXXXX... (xxx being a hexadecimal number) appearing in its working directory, where the ...
- 2,398
46
votes
7
answers
53k
views
Why rsync is faster than NFS?
Few days ago I noticed something rather odd (at least for me). I ran rsync copying the same data and deleting it afterwards to NFS mount, called /nfs_mount/TEST. This /nfs_mount/TEST is hosted/...
- 2,235
45
votes
2
answers
142k
views
chown on a mounted NFS partition gives "Operation not permitted"
I have a remote partition that i have mounted locally using NFS.
'mount' gives
192.168.3.1:/mnt/storage-pools/ on /pools type nfs (rw,addr=192.168.3.1)
On the server i have in exports:
/mnt/...
- 1,401
44
votes
7
answers
16k
views
Troubleshooting latency spikes on ESXi NFS datastores
I'm experiencing fsync latencies of around five seconds on NFS datastores in ESXi, triggered by certain VMs. I suspect this might be caused by VMs using NCQ/TCQ, as this does not happen with virtual ...
- 591
39
votes
1
answer
120k
views
unable to write to mount point (nfs-server), getting "Permission denied"
I'm trying to configure NFS between two RHEL7 nodes:
first node:
[root@ip-10-164-175-246 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.0 (Maipo)
[root@ip-10-164-175-246 ~]# ...
- 12.8k
38
votes
6
answers
146k
views
Are there any free NFS clients for Windows 7?
I have Windows 7 Professional, but the NFS Client for Windows is only included in the Enterprise and Ultimate editions.
I would like to connect some Windows machines to our NFS server so I can drop ...
37
votes
10
answers
67k
views
Unmount a nfs mount where the nfs server has disappeared
Server A used to be a NFS server. Server B was mounting an export of that. Everything was fine. Then A died. Just switched off. Gone. Vanished.
However that folder is still mounted on B. I obviously ...
- 30.9k
35
votes
10
answers
69k
views
Is it feasible to have home folder hosted with NFS?
I'm planning to deploy some kiosk computers and would like to leave them with a small pendrive as boot disk, keeping the rest at an easy to back up server, ala LTSP.
Right now I'm pondering two ...
- 718
34
votes
4
answers
45k
views
What are the advantages/disadvantages of hard versus soft mounts in UNIX?
This question may vary between distros but, in general, what are the advantages/disadvantages of using a hard or soft mount in the UNIX world?
Are there certain situations where one is more ...
- 1,505
31
votes
1
answer
52k
views
NAS Performance: NFS vs Samba vs GlusterFS
I am planning my new shared storage infrastructure for a small webserver farm. Therefore i ran a lot of tests with a lot of NAS filesystems. By doing so, i got some unexpected results and would like ...
- 311
28
votes
1
answer
19k
views
Understanding NFS4 (Linux server)
I've been a bit bothered by NFS4 on Linux. Some information 'out there' seems to conflict with other information, and other information appears hard to find. So here are a couple of things that caught ...
- 1,699
27
votes
1
answer
60k
views
Measure & benchmark the speed & latency of file access on a mounted NFS share
I have a Linux Centos system that mounts some NFS shares, what technique can I use to measure the I/O speed/latency/rate when reading and writing files from that share? Could this technique also be ...
- 3,118
27
votes
5
answers
106k
views
Why is an nfs server mounted as rw returning read only filesystem errors
I am working on a Ubuntu Server 64bit. I have mounted an nfs as rw, but whenever I try to edit anything on the mountpoint in question, I get a read-only filesystem error
my etc/fstab reads:
# <...
- 383
26
votes
4
answers
6k
views
Is it reasonable to use NFS on a production web server?
Can NFS be reasonably used on production servers as a means of connecting a compute server to a storage server, assuming the connection is over a LAN 1Gbe or 10Gbe connection?
There's obviously some ...
- 371
26
votes
4
answers
34k
views
NFS poor write performance
I have two machines connected with 10Gbit Ethernet. Let one of them be NFS server and another will be NFs client.
Testing network speed over TCP with iperf shows ~9.8 Gbit/s throughput in both ...
- 611
25
votes
7
answers
81k
views
mount.nfs: access denied by server while mounting
On my Ubuntu system, I have this line in /etc/fstab:
myserver:/home/me /mnt/me nfs rsize=8192,wsize=8192,timeo=14,intr
When I do
sudo mount -a
I get:
mount.nfs: access denied by server while ...
- 2,235
23
votes
5
answers
61k
views
Files mounted over NFSv4 are owned by 4294967294, UIDs and GIDs match
I have two identical linux machines (identical images launched in amazon EC2) and I am trying to mount an exported directory over NFSv4. Here is what the mounted directory looks like on the client ...
- 914
23
votes
8
answers
21k
views
Analyzing Linux NFS server performance
I'd like to do some analysis of our NFS server to help track down potential bottlenecks in our applications. The server is running SUSE Enterprise Linux 10.
The kind of things I'm looking to know are:...
- 12.1k
22
votes
4
answers
10k
views
Systemd: start a unit after another unit REALLY starts
In my particular case I want to start remote-fs unit after all glusterfs completely starts.
My systemd files:
glusterfs target:
node04:/usr/lib/systemd/system # cat glusterfsd.service
[Unit]
...
- 611
21
votes
1
answer
23k
views
Mount NFS volume on Ubuntu Linux server from macOS client
I have an Ubuntu 20.04 server (a local VM in my case). How do I mount a directory on the Linux server from a macOS Catalina client, using NFS?
- 2,838
21
votes
3
answers
25k
views
How do I forcibly unmount when I'm getting stale nfs file handles?
Got myself into a tricky situation. Have aufs mounted at /mnt/1
aufs on /mnt/1 type aufs (rw,relatime,si=daab1cec23213eea)
I can't unmount the thing:
sudo umount -f /mnt/1
umount2: Stale NFS file ...
- 1,086
20
votes
5
answers
40k
views
exportfs: Warning: /home/user/share does not support NFS export
'exportfs -r' returns me this error when I'm trying to export /home/user/share (ext4):
exportfs: Warning: /home/user/share does not support NFS export.
/etc/exports:
/home/user/share 192.168.1....
- 209
19
votes
2
answers
6k
views
Does NFS and SMB support sparse files?
This question was previously asked in stack overflow but the good folks there have recommended that i try the community over here instead.
I am researching on sparse files with regards to various ...
- 303
18
votes
4
answers
52k
views
File locks on an NFS?
My server uses NFS (Network File System), and I'm unable to use PHP's flock() -function. Is there a way to lock files on an NFS or is there a need to do so?
- 367
18
votes
4
answers
107k
views
"Stale NFS file handle" after reboot
On the server node, it is possible to access an exported folder. However, after reboots (both server and client), the folder is no longer accessible from the clients.
On server
# ls /data
Folder1
...
- 982
18
votes
7
answers
35k
views
Slow NFS transfer performance of small files
I'm using Openfiler 2.3 on an HP ML370 G5, Smart Array P400, SAS disks combined using RAID 1+0.
I set up an NFS share from ext3 partition using Openfiler's web based configuration, and I succeeded to ...
- 1,623
18
votes
2
answers
502
views
An unknown tool is wiping our Virtual Machines and we can't ID it
A console view of a Windows 2008 R2 VM, on vSphere is showing the following screen:
"Operation 2 of 2"
"Wiping disk"
Can someone advise on what this program is?
Some information on this mystery:
A ...
- 1,055
16
votes
9
answers
83k
views
Why pick a NAS over a "normal" NFS share? [duplicate]
From an end-user perspective, what is the difference between a NAS device and using NFS exports from a file server?
They seem to accomplish the same end result.
The difference between a SAN and ...
- 18.1k
16
votes
4
answers
28k
views
Tuning NFS for minimum latency
How can I achieve low latency for NFS exports in order to e.g. have developers work nicely in Eclipse/Visual Studio with their workspaces mounted over NFS?
- 1,604
16
votes
1
answer
26k
views
NFSv4 User Mapping
This question seems to have been asked many times already, but the other answers somehow did not apply to me.
Basically I just set up a new NFSv4 server and I am facing the classic problem where UIDs ...
- 397
15
votes
5
answers
1k
views
Choosing a SAN technology for 100s of VM Web Servers
The Problem
We have an issue with performance on an existing platform, so I'm turning to the hive mind for a second opinion on this. The performance issue so far relates to IOPS rather than ...
- 3,205
15
votes
1
answer
10k
views
What is the difference between Ceph and NFS when it comes to shared file storage?
Can someone explain to me what is Ceph compared to NFS?
From a shared file storage perspective? What is the added value of using Ceph instead of NFS?
- 2,010
15
votes
3
answers
8k
views
NFS with encrypted ubuntu home directory
I am having trouble getting NFS setup on with vagrant:
On my local machine I have installed NFS:
apt-get install nfs-common nfs-kernel-server
And in my Vagrantfile set it to be used:
config.vm....
user71736
15
votes
4
answers
73k
views
mount.nfs: an incorrect mount option was specified
I'm trying to mount an NFS volume on a centos 7.2 server:
When I try to mount the NFS share point, this is the response I get back:
[root@web1:~] #mount -t nfs nfs1.example.com:/var/nfs/home /home
...
- 287
14
votes
2
answers
130k
views
fstab entry to mount NFS with password
i need mount at boot a disk using NFS, to mount manually from console i type:
mount //192.168.0.1/NASShare -o username=administrator,password=pass /mnt/NAS
To /etc/fstab i added this line:
192.168....
- 955
14
votes
1
answer
11k
views
How does NFS read cache work on Debian?
I am planning to use NFS to serve out many small files. They will be read very often so client side caching is crucial. Does NFS handle this? Is there a way to increase the client side caching in some ...
- 1,385
14
votes
2
answers
3k
views
How to setup an NFS server that caches a network share?
User data is stored on two fairly large (>1 PB) OpenStack Swift storage clusters. Let them be Cluster A and Cluster B.
In addition, there are several PoPs that need to interact with that data. ...
- 240
13
votes
5
answers
31k
views
Mounting a file system over the internet
I built a web application that runs on a virtual server for one of my customers. It includes the facility for them to upload files, but they now want to store those files on a server in their office.
...
- 914
13
votes
2
answers
28k
views
NFS I/O monitoring
I have a NFS mounted directory, and I'd like to monitor the I/O usage on it (MB/s reads and writes). What's the recommended way to do that ?
This is the NFS client, I don't have access to the NFS ...
- 145
13
votes
2
answers
9k
views
Win10 NFS Client a SAMBA Killer?
We finally got the last of our recalcitrant Windows 7 users to Windows 10 thanks to MS' recent withdrawal of support from the former, so the entire enterprise now is either Ubuntu 18.04 or Windows 10.
...
- 288
13
votes
3
answers
26k
views
NFS cache : file content not updated on client when modified on server
Here's my set up: One NFS Server machine (v4), several NFS client machines.
When a client machine write files to the NFS mount, the other clients see the new content instantly : no problem.
But, ...
- 131
13
votes
7
answers
113k
views
Can't mount nfs volume - time out
I have an NFSv3 export from a Linux fileserver which used to mount fine. The fileserver had to go down for hardware maintenance. After bringing the server back up, the Linux client can no longer mount ...
- 253
13
votes
2
answers
15k
views
How to do client side NFS failover in Linux?
I have a CentOS 6.3 client that needs to access NFS storage. There are two NFS servers that serve up the same content stored on a SAN with a clustered filesystem. How do I set up CentOS to failover ...
- 371
12
votes
8
answers
13k
views
Tuning NFS client/server stack
I have a CentOS 5 VMWare server connecting to an OpenSolaris 2009.06 machine over NFS that holds the disk images. My virtual machines seem to be bound by slow IO so I'd like to do everything I can to ...
- 596
11
votes
6
answers
45k
views
CentOS 6 + LDAP + NFS. File ownership is stuck on "nobody"
I've been trying to get LDAP authentication and NFS exported home directories on CentOS 6 working for a few days now. I've gotten to the point that I can now login to the client machine using the ...
- 3,417
11
votes
4
answers
13k
views
Read only bind-mount?
I use mount -o bind to mount directories inside chroots, which works really well. The problem is that I'd like some of these bind-mounted directories to be read only in chroot.
Is it possible? If not ...
user13185
11
votes
3
answers
13k
views
nfs, execution denied
I have server (debian 6) machine (say, ip = 10.13.13.100) with nfs exports
/etc/exports
/path/to/my/shared/folder 10.13.13.0/24(rw,async,no_sub_tree_check,no_root_squash)
There are two users on ...
- 123