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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NFSv4 with idmap

The following errors appear on the NFS server, could you please advise how I can fix this? Details: System: CentOS release 6.4, NFS: nfs-utils-1.2.3-36 # cat /etc/idmapd.conf [General] Domain = ...
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1answer
324 views

How to Secure NFS on untrusted clients environment

If I understand how it works, NFS security relies in the fact that the clients can be trusted. I'm worried about some users accessing files from others. Yes, root_squash option avoid root user on ...
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3answers
742 views

Why doesn't NFS recognize a new UID?

I have two servers running RHEL6. I have root access to both. The main server, which I will refer to as server, is a database server. The application server, which I will refer to as client, mounts a ...
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3answers
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Determining disk space usage & file counts for extremely large data sets (any tricks?)

Long time reader, first time asker: I'm a junior-level Linux admin who's increasingly supporting very large data sets/stores on local & NFS storage. The data is generally in the form of massive ...
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1answer
13k 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 ...
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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 ...
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2answers
2k views

iozone benchmark results interpretation

I'm using iozone version 3.373 to benchmark NFSv4 and NBD, but the results are a bit weird! It says that outputs are in KBytes/sec but I am getting values such as 3,411,938 for random read. I am using ...
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3answers
2k views

Permission denied for symlink to executable in nfs mounted directory with the sticky bit enabled

We have an NFS export for any of our users to install and maintain useful software for the network mounted at /public on our clients. On the NFS server, this directory is world writable with the ...
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1answer
4k views

ZFS nfsshare to export RW and RO host?

I have been exporting NFS from OpenSloarins like this (successfully): zfs set sharenfs=root=rw=host1:host2:host3 pool1 I'm acting according the man pages sharefs, share_nfs but the following does ...
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Is mdadm Raid-1 Over A Network File Share Possible?

I am using 64bit CentOS 5.5 I know it's possible to set up software RAID1 using mdadm using a physical hard disk and a RAM disk. Is it possible to set up software RAID1 with mdadm using a NFS mount ...
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Concurrent NFS access

Similar to Concurrent FTP access. How is concurrent file access handled for NFS? Say that one client is updating/overwriting a file on a NFS server, and a process on the server is reading that same ...
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12k 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 ~]# ...
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4answers
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Flush-0:n processes causing massive bottleneck

I have a LAMP cluster that shares files via NFS and occasionally one of them will be stricken for a while when mysterious flush processes start appearing. Can anyone help me? The only way to resolve ...
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1answer
2k views

Shared folder mounted on OSX: NFS, WebDAV or AFP?

We are trying to figure out how to best mount a network share on OSX machines (only). We went with WebDAV initially which does what expected but it's extremely sluggish. Also the Finder seesm to have ...
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1answer
285 views

What makes Lustre faster and more scalable than NFS?

I have read in various places (e.g. here and here) that NFS' I/O performance does not scale, while Lustre's does, and that Lustre can deliver better I/O rates in general. There seem to be various ...
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1answer
453 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 ...
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2answers
1k views

Poor OpenVPN NFS performance

I have EC2 application servers behind an elastic load balancer. All of the application servers have access to a shared storage server, notably for centralized cache files, logging, etc. The shared ...
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1answer
460 views

how can I mount an nfs share on a mac laptop so when it is away from my network it doesn't hang

I can mount an nfs share on my linux machine just fine, but this is a macbook pro that is doing the mounting, and when the laptop goes away from my home network nfs hangs trying to communicate with ...
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2answers
115 views

Replicated shared filesystem

I'm looking into setting up a shared filesystem/file server on AWS (EC2) infrastructure that offers replication and fairly painless failover. This filesystem would host potentially millions of files ...
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1answer
4k views

automount - autofs mount issue on CentOS 6.5

Server CentOS 6.5 and Selinux is permissive My NFS server share in /etc/exports /home/unixmen/ 10.0.0.0/24 (rw,sync,no_root_squash) Client running on another CentOS 6.5 host , is able to mount ...
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2answers
318 views

NFS client keytab: multiple machines

How should one go about setting up client-side keytab files for each client machine to access network services? My working example is NFSv4, which requires each client to have a Kerberos keytab ...
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3answers
2k views

multiple mounts of same NFS share on one client?

I'm moving webspace content to NFSv3 shares. Because of suexec restrictions I have different paths to different subsets of the content on the client. I wonder if I can still have all of the content in ...
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1answer
395 views

build user chroot on first login

I'm using ldap for remote user authentication and I basically need to either figure out how to: a. chroot a user on machine b from machine a via nfs,(which doesn't seem possible without mounting ...
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6answers
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vSphere ESX 5.5 hosts cannot connect to NFS Server

Summary: My problem is I cannot use the QNAP NFS Server as an NFS datastore from my ESX hosts despite the hosts being able to ping it. I'm utilising a vDS with LACP uplinks for all my network traffic ...
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1answer
4k views

NFS client has unbalanced read and write speeds

I've got a NetApp as my nfs server, and two Linux servers as the nfs clients. The problem is that the newer of the two servers has extremely differing read and write speeds whenever it is doing read ...
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1answer
721 views

Does NFSv3 respect ZFS ACL's?

NFSv3 of course doesn't support ZFS ACL's, but what will happen if I have the following setup?: +-----------------------------------------+ +-------------+ | FreeBSD ZFS serv1 ...
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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 ...
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2answers
7k 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, ...
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2answers
603 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 ...
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votes
1answer
987 views

Central “/home” using SSHFS?

The standard way to setup a central "/home" directory on a Linux workstation is using NFS. The problem is that I don't like the lack of real security in NFS. So instead I want to try to use SSHFS. ...
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2answers
1k views

How can Linux mount an NFS directory, and the filesystems mounted inside it?

I have an NFS server with a directory which contains a dozen other local filesystems. I'd like to mount the top-level directory on the server, and have the Linux client automatically mount the right ...
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2answers
4k views

Good NFS multipath solution

I have a couple of servers serving exactly the same content through NFS to several webfarms, all the servers involved are running CentOS 5 The content between both NFS servers is replicated using ...
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3answers
436 views

Are there any good intranet search engines?

I'm searching for a intranet search engine which is capable of spider our intranet websites and network shares like SMB, NFS and optionaly AFP. Ever better for us would be a search engine which is ...
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3answers
205 views

System to keep folder synchronized with remote server

We have a Linux server with a couple of NFS shares on our local network, and we want to be able to access the data on those shares from some remote machines outside of the LAN. What we are planning on ...
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votes
3answers
3k views

Stale NFS handle

I have several xen guest OSs that get their root file system from NFS. I changed /etc/network/interfaces on some of them (on the nfs server) and then rebooted them. Now I get lots of 'Stale NFS ...
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1answer
136 views

Poor NFS Performance Using Multiple Disks

I have a server system running Ubuntu 12.10 with 12 disks attached. I am sharing all of these disks on my 10 gigabit network using NFSv4. However, I am getting generally poor performance over NFS ...
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1answer
583 views

Creating two nfs shares from same server, but when mounted, both point to same directory

I've got a group of server that need two nfs shares, a few servers need access to one of the shares and all of the servers need access to another. The NFS server is ubuntu 12.04 and the others are ...
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1answer
4k views

NFSv4 and rpcbind

According to Red Hat docs 'rpcbind' is not required any more: Because protocol support has been incorporated into the v4 protocol, NFSv4 has no interaction with the portmap, rpc.lockd, and ...
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2answers
4k views

Can not mount NFS from server on local network

I set up my NFS server without doing any bigger changes in configuration files. After that I added these entries to /etc/exports(both paths are valid) on server(192.168.1.11): /export ...
3
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1answer
427 views

Using NFS for scalable PHP/MySQL web application

Here's the situation: I have a PHP/MySQL web application that accepts user uploads (pdf files). From these pdf files' pages a preview image is made on the fly and presented to the web app's users. ...
3
votes
1answer
2k views

Delaying NIS & NFS startup till after network interface is fully ready on Fedora 17

I've recently set up a fedora 17 server for our network, and I've been having trouble getting the NIS service to work on startup. Here's some logs from the system: Aug 21 12:57:12 cairnwell ...
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1answer
428 views

Mixing NFSv4 all_squash and sshfs access

I have a problem with my server. In my internal network I hand out several network shares using NFSv4 from a Debian Squeeze server to my clients. These shares use the all_squash option because I want ...
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2answers
573 views

In search of a network file system with extended caching to speed up file access

I'm running a small home server that stores my documents. The disks in this server are in a RAID 1 configuration (using Linux md) and it's also periodically being backed up to an external hard drive ...
3
votes
3answers
782 views

vmware vmdk disk problem

I have a VMware ESXi 4 server and 2 storage servers (mounted via nfs). Between the storage servers (Fedora 14) is a drbd cluster (dual primary) and ocfs2 filesystem; also every server has a local ...
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4answers
890 views

Pros/Cons of filesharing protocols for a Mac environment

In our school division, we have a OS X Server sharing files to up to 120 Mac clients [for things like home folders and group sharepoints]. The AFP protocol is the easiest to set up and use, but that ...
3
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1answer
610 views

NFS v4 ACL inheritance problems - “i” flag set but not wanted

What I am trying to is add an NFS v4 ACL that allows a directories, child and grandchild, great grandchild etc directories and files to inherit a delete ('D') flag under linux. The underlying file ...
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1answer
365 views

Unable to read from/write to an NFS share from Win XP client

We have an NFS share on a Debian Linux host which is mounted on a Win XP host using SFU. We can create folders on a share or delete files from it but it's not possible to perform file write or read ...
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2answers
4k views

How to change 'Advertised pause frame use' and autonegotiation setting on gigabit NIC

I'm investigating some poor nfs performance on a new server, as compared to an old server. Both the old and the new server are nfs clients, and they connect to the same exact NetApp nfs server. My ...
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2answers
2k views

Drupal on an NFS share has terrible performance

We have a setup where a Drupal 7 site with the following setup - a VMware ESXi 4.1 host server running a web vm and an NFS VM. The web VM is using Apache and mod_php. The site is still in development ...
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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 ...