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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NFS daemon not starting up with error message “Kernel does not have pseudo root support”

My nfs daemon is not starting up anymore. I see the following entries in the syslog: Sep 26 18:21:10 VOXWEBPRODDHNCGN001 mountd[3401]: Kernel does not have pseudo root support. Sep 26 18:21:10 ...
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1answer
34 views

Chain NFS sharing [on hold]

We have a storage server which for some reason cannot be reached directly (and of course not in same network). So we thought that we need to create some kind of chain NFS sharing like; ServerA ...
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2answers
29 views

Stop file being deleted on NFS mount

I have files stored on an NFS mount which I want to prevent being deleted. The use case is I have a demo version of a web application which uses the same images on every demo - when someone deletes a ...
2
votes
1answer
933 views

How to achieve multiple NFS/TCP connections to the same server?

I'm trying to maximize the NFS/TCP bandwidth between a Linux client and a single NFS server over a 10Gbps link. Although each NFS mount has its own device (major/minor), everything comes down to a ...
4
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2answers
848 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 ...
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1answer
323 views

Proxmox - backup OpenVZ on NFS

I'm using Proxmox 3.2 with OpenVZ containers and I'm trying to setup a backup system for my 2 nodes cluster. I created a NFS share on a Debian 7.5 server (not under Proxmox, and not inside the ...
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vote
1answer
24 views

What is the difference between rMB_nor/s, rMB_dir/s, and rMB_svr/s in iostat?

I'm trying to interpret the results of running the following command iostat -mnhyc It produces the following Filesystem: rMB_nor/s wMB_nor/s rMB_dir/s wMB_dir/s rMB_svr/s ...
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1answer
26 views

Doesn't NFSv4 have no_root_squash?

When I in /etc/fstab have nas:/tank/nobackup /mnt/nas nfs exec,nosuid,rw,bg,soft 0 0 then mount -a; mount gives nas:/tank/nobackup on /mnt/nas type nfs ...
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0answers
17 views

Disable file content/data cache for NFS?

I'm using NFS to share a directory between host (nfs-serer) and guest (nfs-client) system. I did not want to use KVM's preferred module 9p due to slow transfer speeds - NFS, does yield about twenty ...
1
vote
1answer
68 views

NFS share problems - RPC: fragment too large: xxxxx

We have a virtual server with an NFS share that is written to by other servers. Today the NFS share became inaccessible. The syslog was full off messages like this: RPC: fragment too large: 311176 ...
3
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4answers
2k views

XenServer and ZFS via NFS

I'm trying to connect a NFS share to XenCenter. The NFS server is a ZFSGuru distro (uses FreeBSD). The zfs volume was exported like this: /sbin/zfs set sharenfs="on" temppool/share According to ...
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1answer
877 views

Unable to map ubuntu NFS shared folder on windows 7 and windows server clients

Here is my problem: The NFS shared folder was working without any problem. All the machines of a small network could use it. But something happened few months ago(I have no idea, maybe some ...
2
votes
1answer
1k views

Reconnect Attempts for CIFS share

I have a CIFS share mounted in the FSTAB on Ubuntu server, which connects to our NAS and works without issue. Last night we had an issue with the SAN for about 12 hours. We corrected the problem and ...
2
votes
1answer
777 views

Problems mounting Kerberos authenticated NFS share on CentOS 6.4

I'm trying to mount a Kerberos authenticated NFS share on a CentOS 6.4 machine. I have tried exporting the protected share from both another CentOS 6.4 machine and from our NetApp with the same ...
9
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1answer
2k views

What causes repeated linux NFS client side RPC credential refreshing?

Using nfsstat -c, I'm seeing a high "authrefrsh" (known as "newcred" on some systems) count on my NFS client pc for operations like ls and find on directories containing ~1000 files. This correlates ...
2
votes
2answers
471 views

nfs file access statistics

For a Linux NFSv3 server, is there any way to see statistics on actual file access? In other words, I would like to see a timestamped log of every file read or written. Motivation: I have several ...
1
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1answer
29 views

Where is NFS data cached?

I mounted an NFS export and started a process that I expected to write a significant amount of data to the shared disk. The speed of the shared disk was so slow that I killed the process, but IO on ...
2
votes
1answer
33 views

NFS: How to allow a specific user to write in a NFS mount?

I wrote a Nagios check which is supposed to check the time it takes a server to write a file to one of it's mounts. The check is being run by user nagios. The NFS server is configured like so: ...
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1answer
2k views

NFS compound failed for server foosrv: error 7 (RPC: Authentication error)

I'm setting up an Ubuntu NFS server with a Solaris 10 client. The basic configuration looks okay to me, and it was also working for some time. I'm getting an "RPC: Authentication error" message on the ...
0
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1answer
832 views

Ubuntu client can't mount Nexenta NFS

I have a Nexenta storage box (Solaris), which exports an NFS share. Mac OS X and older Ubuntu clients can mount the NFS share just fine, without any special options. Later version of Ubuntu simply ...
0
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3answers
61 views

Is is possible to live sync two network drives?

I have one NAS in India (active) and while other in US(passive). I want to sync the US NAS with that of India in real time (with permissible latency) I tried using RAID1 for this purpose, but I ...
4
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0answers
122 views

Configuring Synology NAS as freeIPA client

I'm attempting to deploy freeIPA in my company. The network is quite simple: < 10 FC20 (and FC21 beta) desktops < 5 FC20 servers (including the one with freeIPA) 1 Synology NAS DS1813+ (DSM ...
0
votes
1answer
922 views

NFS and mounted subdirectories

I have two physical disks mounted as such: sda1 -> /mnt/storage sdb1 -> /mnt/storage/homes I've exported /mnt/storage as an NFS share. The client sees all of the contents of /mnt/storage, ...
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1answer
1k views

Why does the “nocto” NFS mount option in Linux not prevent flush-on-close?

I've been learning about the close-to-open policy of NFS, which causes each file to be flushed to the server as it's closed, to ensure consistency across clients. (See ...
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1answer
1k views

CentOS 5.4 NFS v4 client file permissions differ from original files & NFS Share file contents

Having a strange problem with NFS share and file permissions on the 1 out of the 2 NFS clients, web1 has file permissions issues but web2 is fine. web1 and web2 are load balanced web servers. So ...
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1answer
2k views

Which file sharing protocol (SMB/AFS/NFS/SMB2/SMB3) is best for an mixed client environment within an ad?

I'm just setting up freenas with ZFS and was wondering which file sharing protocol / data transfer protocol is the best to use? Has anyone experiences? I guess i have a very typical business setup. I ...
5
votes
3answers
15k 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 ...
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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 ...
2
votes
1answer
4k views

mount: mount to NFS server 'IPADDRESS' failed: RPC Error: Program not registered

I've got two Redhat5/CentOS systems which share a folder. I'm trying to change the shared folder location, but I ran into this error on the machine on which the folder is mounted... How can I correct ...
7
votes
9answers
2k views

Geographically distributed file system with preferred locality

I'm building a application that needs to distribute a standard file server across a few sites over a WAN. Basically, each site needs to write a lot of misc files of varying size (some in the 100s MB ...
0
votes
1answer
933 views

NFS server is ignoring anonuid?

On NFS server I've got user with UID=1024 and GID=1204. On client side too. Both servers are CentOS 6.4 (2.6.32-358.2.1.el6.x86_64). Right now anonuid/anongid is not working. Files aren't mapped to ...
0
votes
2answers
969 views

How to mount an NFS share in a VM guest?

We have a machine with Win7-x64 installed. On this machine, with VirtualBox, we're running a guest Fedora-x64. We've defined an NFS share on this Fedora instance. Here is the entry in /etc/exports: ...
2
votes
3answers
2k views

How do I set up a Windows NFS share so that I can view it's contents on Linux?

My NFS server is a Windows XP SP3 box with the Microsoft Windows Services for Unix installed. I have a share configured under C:\NFS with the share name NFS and ANSI encoding. Anonymous access is ...
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vote
1answer
1k views

Automounting home directories using LDAP in ArchLinux

I have managed to set up an OpenLDAP server that runs ArchLinux. I can now log in from the client (also ArchLinux) using the LDAP users. Now i want to mount the home directories over the network... I ...
1
vote
1answer
141 views

Share disks through NFS on a CoreOS cluster?

Is it possible for a CoreOS cluster to share disk space, e.g. using NFS? If so, how would one go about this? (e.g. in the scenario where one node has a lot of disk space). This would be useful to ...
1
vote
1answer
78 views

Network File Systems (NFS) between multiple AWS EC2 Instances for VisualSVN Servers behind Load Balancer

I have a couple of windows server instances running on Amazon EC2 with VisualSVN Server and would like to make them a bit more fault tolerant by running a duplicate instance with load balancers. The ...
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votes
1answer
44 views

Solaris NFS Mount Permissions [closed]

I've created an NFS share and have added to vfstab. However, I'm not able to change permissions or create directories as ROOT on the server where it is mounted. $ mkdir test mkdir: Failed to make ...
1
vote
3answers
101 views

Find out what NFSD processes are actually doing?

When I view top on one of our servers there are a lot of nfsd processes consuming CPU: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2769 root 20 0 0 0 0 R ...
1
vote
0answers
49 views

Transparent data caching in multi-site environment

I need an advice on choice of the right technology for my problem. I have geographically distributed multi-site environment where there is one main site and a number of remote sites. Main site ...
1
vote
0answers
44 views

Copying from NFS mount crashes Linux client machine

I have NFS share mounted on CLIENT in /etc/fstab: SERVER:/share on /mnt/share type nfs (rw,users,noexec,nosuid,nodev,timeo=14,hard,intr,addr=1.2.3.4) Intensive use on client like copying a lot of ...
1
vote
0answers
28 views

Can NFS unlink and recreate result in a race condition?

I'm seeing strange behavior and I'm wondering if it's a race condition. The strange behavior is MySQL getting EEXIST when trying to create a temporary file. MySQL reuses temp file names by default, ...
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votes
2answers
49 views

Can NFS server limit the amount of disk space that the NFS client can use?

Let's say in a server A with 100GB partition, user create a NFS export directory. In server B, user mount the NFS share to use it. In server A, can the NFS server limit the amount of disk space that ...
1
vote
1answer
36 views

Can I use user-based kerberos authenication with NFSv4?

Is it possible to set NFSv4 + Kerberos to do user-based authentication? As far as I understand you are required to create a principal for a client machine(i.e. it is still Host-based?) on Kerberos ...
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2answers
79 views

Which file system best handle multiple, concurrent write sessions [closed]

Which file system best handle multiple, concurrent write sessions Which file system can handle more concurrent write sessions; let’s say 32 write sessions? The file system has to handle 32 ...
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0answers
24 views

QSUB error in NIS. stale NFS file handle

I'm one of the user of our server, not administrator. Our main server uses NIS. And File system and clusters are connected to NIS server. Whenever I want to execute ./program.sh I type qsub -q ...
3
votes
1answer
36 views

What are some good ways to identify nfs clients that cause high load on nfs server

Sometimes my nfs4 server is under high load. Is there any good tools identify which client causes it. running iotop and nfsstat on nfs server shows only general load information which does not help to ...
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vote
5answers
9k views

getting input/output error from NFS client on RHEL5

I have two RHEL5 boxes on a private network together (192.168.2.0/24) and I am trying to export a file system from one to the other but I keep getting the following error: mount.nfs: Input/output ...
2
votes
0answers
45 views

Linux NFS server refuses blocking locks

So I have this problem. This horrible, awful problem. I have a set of Linux NFS servers (in a NFS/CIFS cluster using CTDB) that refuse locks… only when the lock is blocking. If it's a non-blocking ...
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votes
1answer
40 views

Would it be good idea to share DNS zone files via NFS?

Any expert advice on Bind DNS zone file transfer (master->slave) via NFS? Are there any drawbacks for not using Bind's zone transfer feature? Thanks a lot!
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0answers
91 views

nginx operation not permitted

After last reload nginx i have error nginx: [emerg] chown("/gypost/uploads/00", 1001) failed (1: Operation not permitted) 192.168.0.91:/gypost/mail/u 247G 17G 218G 7% ...