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 ...

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2answers
57 views

Fastest security check of file tree on NFS

I am currently experiencing very bad performance using the following on an NFS network folder: time find . | while read f; do test -L "$f" && f=$(readlink -m $f); grp="$(stat -c %G $f)"; ...
0
votes
1answer
241 views

NAS server freezes in cluster environment using NFS

In our department we have an Iomega NAS (px4-300d) connected to a Supermicro cluster with 5 nodes (12 cores per node). Each node mounts a share on that NAS by using NFS. Unfortunately after some time ...
4
votes
1answer
336 views

How do remote filesystems (nfs ssfhs) handle remote-to-remote copies?

After working with a few large files over sshfs, one question started dwelling in my mind. Suppose I have a sshfs (or NFS for that matter) mount on ~/remodetir and I want to do something like cp ...
0
votes
1answer
2k views

NFS Mounts Issues

Having some issue with a NFS Setup on the clients it just times out refuses to connect [root@host9 ~]# mount 192.168.0.17:/home/export /mnt/export mount: mount to NFS server '192.168.0.17' failed: ...
1
vote
1answer
104 views

Feisty network mount refuses to umount

I have a particular network share that's giving me grief. Basically, we had two NAS devices which had to be moved to another building. I updated /etc/fstab to the new IP addresses and tried to remount ...
3
votes
1answer
394 views

Making NFS behave like a block device

We're currently working on a virtualization setup, and because of features like being able to grow volumes on our filers rather than having to go through the process resizing block devices etc. we'd ...
5
votes
1answer
409 views

What's the best way to share source code between EC2 instances?

Currently I have 4 EC2 instances in amazon cloud behind a load balancer and this number will grow up to 20-30. I am looking for the best way to manage source code on all of these instances. There is a ...
3
votes
1answer
1k views

How do I rearange a file tree and then export it over NFS?

I've got a backup server that stores incremental backups in a tree like this: /backups hourly.0 server 1 server 2 hourly.1 server 1 server 2 hourly.2 ...
2
votes
0answers
426 views

NFS inherit permissions from shared directory - Mac OS client

Short question: Is there a way to have files on a NFS share on a Mac OS client inherit the permissions of the shared directory? Scenario: Ubuntu 12.04 server Mac 10.7.4 client shared directory has ...
2
votes
3answers
3k views

NFS maximum number of simultaneous operations per connection?

I heard from Tier 3 vendor support that NFS has some sort of limit (I was told 16) as to the number of concurrent operations that can be executing at the same time. I apologize that I don't have any ...
4
votes
1answer
705 views

Does an NFS export with sec=krb5 *require* that the parent directory also be exported with sec=krb5?

I copied somebody's NFS server/client setup verbatim and am having trouble making sense of what's going on with it. This is the /etc/exports: /export ...
3
votes
1answer
646 views

Weird permission issue with POSIX ACLs, NFS v3 on Linux

I have two Linux systems, both running Debian Squeeze. Versions of (I think) the stuff involved are: kernel: 2.6.32-5-xen-amd64 ii nfs-kernel-server 1:1.2.2-4squeeze2 ...
4
votes
1answer
2k views

Mount Mac OS X 10.7 share on CentOS?

I need to create a mount point/share on a Mac OS X 10.7.4 (non-server) machine that a CentOS 5.2 box can mount. I've searched a ton but most instances are for using a linux server and Mac client... ...
21
votes
1answer
4k 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 ...
6
votes
3answers
706 views

Timing issues with OpenVPN and NFS mounts (Debian Squeeze)

I'm trying to mount NFS filesystems over an OpenVPN link on Debian Squeeze. The problem is that the default layout of init scripts and such tries to mount the NFS filesystems before bringing up the ...
2
votes
2answers
692 views

NFS4 Username Mapping Between OpenIndiana and Linux

I have an NFS4 share on an OpenIndiana server that I'm trying to properly access with an Ubuntu Linux machine. The username that owns the files in the share on the server is "nick" its UID is 104 on ...
0
votes
1answer
1k views

Symantec Backup Exec can't see network shares

I have a CentOS 6 host with a NFS export where I have stored some virtual machine backups. Now I want those backups to tape for archival. I have mounted the share to a drive letter under Windows 2003 ...
3
votes
0answers
312 views

using chained automount to mount home directory

I have set up two directories mounted with automount (via LDAP): in the /home directory automount is configured to mount * -fstype=bind :/network/srv/home/& in the /network directory one ...
4
votes
1answer
727 views

mount using insecure ports for nfs

Title says it. mount is occasionally making NFS mount/unmount requests from insecure ports. I believe the issue is being caused by all of the secure ports being stuck in TIME_WAIT after periods of ...
3
votes
1answer
5k views

What is launching all of these rpc.statd processes?

On of our servers -- running CentOS 6 x86_64 -- we're seeing a lot unusual activity with rpc.statd. We have rpc.statd configured to run on a static port via /etc/sysconfig/nfs: MOUNTD_PORT=892 ...
2
votes
1answer
2k views

NFS server is exporting the wrong directories

It is a bit embarrassing to admit, but I have problems getting my NFS server exporting the right directories. I am using an up-to-date CentOS 6.2 on both the client and the server. The server is up ...
3
votes
1answer
2k views

How do I disable NFSv3/v2 connections to a FreeBSD NFSv4 server?

I am using a Kubuntu 11.10 client with a FreeBSD 9.0 server. The server has the following lines in /etc/rc.conf nfs_server_enable="YES" nfsv4_server_enable="YES" nfsuserd_enable="YES" and the ...
1
vote
0answers
303 views

NFS mounted from Mac OS X Lion doesn't update

Using Mac OS X Lion 10.7.3, I mount my NFS share exported from a Linux machine like this: My machine is a Linux 3.2.0-17-generic. $ sudo mount_nfs -P precise:/media/sda2/datas/SAB /media/nfs1 ...
1
vote
2answers
868 views

Backup to NFS with different user IDs

I'm running Xubuntu and trying to back up my filesystem to an NFS share using rsync using the command: rsync -vSHPhhaX --numeric-ids --delete --exclude-from=/home/rena/.scripts/exclude-list / ...
0
votes
1answer
687 views

how to rdiff-backup with list increments

I have already created nfs server and client for backup web server and cms server like at http://www.myee.web.id/2012/04/nfs-server-for-backup/ Then I installed rdiff-backup, for backup I running ...
1
vote
2answers
1k views

Detect if clients are connected to a network share

we're running samba and nfs servers on an Ubuntu LTS 04.10 machine. Is there a way detect on the server, whether any client is connected to one of the shares? The clients are Windows 7,Linux or OS X ...
8
votes
2answers
3k views

Troubleshooting strategy for very poor iSCSI/NFS performance

We have a new Synology RS3412RPxs that offers iSCSI targets to three Windows 2008 R2 boxes and NFS to one OpenBSD 5.0 box. Logging into the RS3412 with ssh and reading/writing both small files and ...
3
votes
2answers
6k 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, ...
1
vote
1answer
1k views

Netboot Debian (wheezy) from NFS v4

Is it possible to boot Debian Wheezy from NFS v4? Bootwing with NFS v3 works just fine. NFS v4 not. This is in my /etc/exports: /nfs ...
0
votes
1answer
260 views

www-data is unable to write to an NFS share

On Debian Squeeze, I created an NFS share with these options rw,sync,no_root_squash,no_subtree_check,insecure and on the other Debian Squeeze I can successfully mount it and read write with root, but ...
14
votes
4answers
83k 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?
8
votes
1answer
1k views

NFS (with Kerberos) mount failing due to “Server not found in Kerberos database” error

When running: sudo mount -t nfs4 -o sec=krb5 sol.domain.com:/ /mnt I get this error on the client: mount.nfs4: access denied by server while mounting sol.domain.com:/ And on the server syslogs I ...
2
votes
1answer
485 views

Using ionice Over Cluster

Background: I use a computing cluster at work (4 slave nodes and 1 head node) that uses the SGE job scheduler. Recently we've been running jobs that do some heavy IO and it has been slowing down ...
4
votes
2answers
938 views

Mounting NFS3 using Kerberos and AD

I've got a Linux server (Centos 5.6) that needs to automount home directories from a Windows (Server 2008) NFS share using Kerberos. The share mounts (with the nobody user and group) if authentication ...
2
votes
1answer
932 views

NFS client unable to mount shares from otherwise responsive server

We are unable to mount NFS shares to our Debian Lenny Database/Web-App NFS client from our Fedora 8 NFS server. Manual mount command with options and Assisted mount using fstab options returns the ...
0
votes
1answer
1k views

fstab mount after network initialization

I'm automatically mounting a NFS with fstab. Sometimes the mount fails because the hostname of the NFS mount cannot be resolved (getaddrinfo failed). I'm assuming that this happens because the network ...
0
votes
1answer
980 views

Mounted NFS directory not writable by Apache / PHP

Need some help here with NFS. Here's what I have (all servers running CentOS 5.6 with SELinux): 172.17.20.1 - Primary server with static IP. Varnish redirects requests to the web servers. 172.17.20.2 ...
3
votes
1answer
11k views

NFS client mount fails behind firewall

I have an Ubuntu 11.10 system with an iptables firewall. After pinning the ports for mountd, lockd and statd, then opening them up in iptables, I am able to expose NFS shares through the firewall ...
17
votes
1answer
13k 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 ...
0
votes
1answer
228 views

NIS/NFS Equalent for Windows

Is there a Windows counterpart for the NIS/NFS implementation on Linux based systems where the entire user settings/ privileges / policies and most importantly the user files are stored on the server ...
2
votes
1answer
3k views

Getting at fsid under Linux? Or an alternate way of identifying filesystems?

In an environment with automounted home directories, such that the same filesystem exported by a fileserver may be mounted multiple times on the client, I would like to authoritatively be able to ...
0
votes
2answers
240 views

Why does Nexenta seem to ignore my /etc/system settings?

I am trying to tune my NFS performance, but for some reason nexenta is ignoring whatever I specify in /etc/system. In the following screen shot it becomes apparent that my manual settings are not ...
1
vote
0answers
1k views

Same nfs mount options, different output

I have 2 OEL5.5(RHEL5.5) servers. I'm trying to figure out why when I run mount command I get different outputs. Server1 has the following line in /etc/fstab/ 10.11.0.61:/vol/exports/ /exports ...
2
votes
1answer
739 views

NFS mounts showing files from other mounts

I have a server that holds ZFS snapshots that I export via NFS to the servers they are backing up so you can restore via a custom application written in-house. The issue is as follows: NOTE: I am ...
0
votes
3answers
2k views

OpenIndiana poor write speed with 32Gb RAM and 64Gb ZIL

I am getting poor write performance on a NFS share hosted with OpenIndiana 151a. I have 2x 1 TB Mirror (Seagate constellation drives), 2 SSD drives, 1 read cache and 1 write cache. My thinking was, ...
3
votes
2answers
150 views

Measuring I/O Performance Paradox

I'm trying to figure out the correct way to get the 'real world' write performance of my NFS cluster. The NFS export is mount on a XEN hypervisor, and I'm running 'dd' from within a VM. What I ...
2
votes
1answer
125 views

Does NFS cache reads by block or by file?

I have a large image stored on NFS. I want to read only the first portion of the image to get the header. Does the NFS client stop reading after it gets the blocks it needs or will it receive the ...
2
votes
3answers
401 views

Recommended networked file system for web servers?

If I have two web servers, what would the best way to keep their files in sync? Unfortunately the sites themselves cannot be altered significantly. Most of them are Wordpress based, but there are ...
1
vote
2answers
5k views

Can't mount NFS share over TCP

I'm beating my head against a wall with this one. Environment is 2 x CentOS 6 64bit installs. Both NFS client and server are fully up to date as of 1 hour ago. I've set up an NFS export on the ...
1
vote
0answers
1k views

automount stops working due to hanging mount.nfs processes that leave /etc/mtab~ lock file

I've got many automount entries in LDAP for mounting ~200 nodes between each other. Often, the automounter stops working. After debugging, I figured out that it can be fixed by running rm -f ...