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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DRBD vs. GlusterFS for replication

I need to build a solution to host internal git repositories. It needs to supports hundreds of thousands (or more) repositories. I plan on using multiple "dumb" servers with a shared storage, so ...
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2answers
719 views

ESX or ESXi as FCoE or ISCSI or NFS target?

Is is possible to set up ESXi or more expensive ESX server as a storage target (FCoE, ISCSI or NFS, in that order) for other ESX servers? If so, how?
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4answers
3k views

ZFS on Linux for RHEL/OEL NFS Sharing

I'm trying ZFS on Linux for Oracle Linux (OLE) 6.1 (Red Hat RHEL 6.1 compatible clone). I successfully compiled and installed spl and zfs on it for Oracle Unbreakable Kernel. Zfs is working and I ...
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3answers
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How dangerous is NFS async when RAID BBU and UPS are present?

I have an NFSv3 server and around 15 clients. I am looking for pros and cons enabling async on the server side. I have read about it, but it is still a bit unclear to me. I know it can lead to data ...
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5answers
774 views

hardware for bulding unified storage solution using nexentastor

looking to build a box for holding 5 to 8 TB of storage using nexentastor OS. without using commercial solutions like netapp. my current list is: Intel Xeon 8GB of RAM RAID controller with 256MB ...
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2answers
67 views

Will locally mounting root filesystems of all remote servers being managed eliminate need to share dotfiles?

I've got about 10 remote servers being managed, through SSH, and I typically just SSH into each of them for remote management tasks. This requires me to have duplicated many of my dotfiles (like ...
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3answers
862 views

How should I install NFS on a linux system?

I have two systems and I need to setup a folder on one of them that is completely read/write-able by the other. Questions: 1) How do I setup NFS on the server(s)? It is not installed as an available ...
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1answer
2k views

NFS access from multiple networks

On my NFS server (Ubuntu) I have in /etc/exports the following: /share 192.168.89.1/24(rw,no_root_squash,async) However, I have a new machine which is not in 192.168.89.* IP range, it's in ...
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889 views

NFS server under Linux over multiple disks

I am running Debian, and need to setup an NFS server. My server has five identical 2TB disks. I will need to setup folder quotas. I am planning to use software raid by putting 3 of the five disks into ...
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3answers
3k views

Can I change the name of an NFS export

I am exporting my /opt/target directory via NFS but I would like the nfs clients to be able to mount it as /target. i.e. I would like showmount -e to show /target not /opt/target. Can that be done?
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1answer
169 views

Linux read disk cache and NFS

I am interested in the impact of the read disk cache on accessing a file through NFS. Lets say I have a file on NFS. I access it (do "cat myfile") from a linux host "A". If there's enough RAM a file ...
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220 views

Is NFS bidirectional?

If I write a file in the NFS-mounted folder of an NFS client, will it appear on the NFS server? Or is it possible to write a file in that folder in the first place? Thanks!
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2answers
670 views

Solaris NFS which client is all that traffic comming from?

On Solaris / OpendIndiana NFS server, is the a way to get per-client stats?
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3answers
1k 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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3answers
2k views

sysctl.conf not running on boot

At what point is sysctl.conf supposed to be read during boot, and why might it not be running? I have the following settings which are not being applied when I reboot: ...
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3answers
202 views

Disallow root to su on a user which is not listed in /etc/passwd

On Linux we authenticate users against AD. The AD users are not listed on /etc/passwd. We are about to deploy a NFS solution to mount some extra space for each group of users. If a user(A) with sudo ...
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3answers
5k views

NFS write performance

We have three VMware ESXi 4 hosts serving VM's from an OpenFiler NFS share. Every host has a direct gigabit connection to the NAS. Although read performance has been great, writing files inside the VM ...
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4answers
4k views

Apache throwing 403 on serving images from an NFS share

I'm repeatedly getting 403 Permission Denied errors on trying to serve images from apache running on Machine A. The images are in a directory which is an NFS share from Machine B. The entry on ...
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1answer
209 views

A thin client running Linux in a wireless network environment

I am the sole IT person for a small private school. The school has about 60 PCs. All PCs are on a wireless network; there's no Ethernet network in the building. I would like to migrate the school ...
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2answers
7k views

How can I remount an NFS volume on Red Hat Linux?

I changed the user id of a user on an NFS client that mounts a volume from another server. My goal is to get the 2 users to have the same id, so that both servers can read and write to the volume. I ...
2
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4answers
679 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. ...
2
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1answer
258 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
437 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 ...
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1answer
9k 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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1answer
412 views

Redundant NFS Setup?

Is it possible to create a fault tolerant, redundant NFS server (e.g. master/slave)? Several of my web servers mount their WEBroot directories from a single NFS server (which is regularly backed up). ...
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4answers
862 views

Is Samba the right choice for me?

we have a distributed application which uses large amounts of content (all kind of files). There are several servers that need to access the content. Right now the content is stored on each server ...
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2answers
257 views

In Linux, how to temporarly freeze a user?

On a mis-configured or buggy network filer (NFS NAS) writing a large file can cause the filer to freeze. For diagnostics I need to be able to: Suspend (or in other words temporary freeze) all ...
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2answers
732 views

Can't connect to ssh after nfs problem

I had a problem yesterday with a server that lost connection (S1). From that server, there was a dir shared with NFS to another one (S2), no homedir and not in $PATH, but a dir to store old files for ...
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2answers
2k views

Why are Solaris logins slow when remote storage server NFS mounted?

We've got a curious problem with one of our Solaris (10, U8) servers. If we have our extra storage array mounted via NFS, the Solaris user logins are exceptionally slow. Unmount the storage device ...
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4answers
2k views

How to remove directory on NFS fileystem with an enormous number of files

A poorly tested program created a directory on an NFS share with an enormous number of files, which I need to remove. ls -ald /home/foo drwxrwxr-x 2 503 503 317582336 Jul 29 11:38 /home/foo The ...
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1answer
1k views

How to ensure nfs home directory is mounted before login

I have a machine (with mythtv installed) which automatically login a user, whose home directory is located on a server accessed by NFS4. In about 6 of 10 times it works like a charm, but sometimes the ...
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1answer
8k views

NFS exporting a directory that's already NFS mounted (on the server)

I have a NFS server, A, that's sharing out a folder. B is mounting the the folder. B is also sharing that folder out. However C is unable to mounted it. The error on C is: mount.nfs: ...
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3answers
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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 ...
2
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1answer
53 views

Will Windows use NFS to write to a self mapped share?

If a Windows server has a drive mapped to a share on the same server, will it still use NFS to read/write or does it know that the drive is actually local? Would I/O performance be improved by using a ...
2
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1answer
2k views

Mount export of an nfs share

I have two machines A and B that are not on the same network, and I'd like to export an nfs share from one machine to the other. In the middle, I have a machine M that is on both network. I ...
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2answers
1k views

Removing and copying files slow on NFS folder

I have a server that hosts images and allows access to one directory for one client over NFS. The directory contains about 70K images and is 12GB big. When I execute commands like cp or rm on the ...
2
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1answer
394 views

ZFS, NFS and user based quotas

I am using a ZFS storage (FreeNAS 9.1) with NFSv3. The NFS is mounted on Debian machine, where the linux users are created (they don`t exists on FreeNAS). How do I enable standard linux user based ...
2
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1answer
6k views

NFS user mapping

I have two machines, both with CentOS 6.4 installed, connected on the same private network. One of them has the purpose of being a NFS server, and the other it's client. On the server machine ...
2
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1answer
508 views

run nfs server version 3 only

I'm a RHEL guy, and new to debian/ubuntu, I have just setup an nfs server, and when I mount a share on a client, it uses version 4, how can I get the server to run with nfs version 3 only? PS: our ...
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4answers
5k views

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 ...
2
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1answer
643 views

'No space left on device' on mounted NFS device

On NFS Server: Filesystem 1K-blocks Used Available Use% Mounted on /dev/xvdf2 103212320 85090308 12879132 87% /export18 On Client Server: ...
2
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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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3answers
2k 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 ...
2
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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 ...
2
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1answer
123 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
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1answer
354 views

How to change NFS export allowed IP addresses on Mac OS X Server (Tiger)?

I am running NFS on a Mac OS X Server 10.4. I had originally set up the NFS exports in the GUI, and restricted the IP addresses in the GUI to which it can export. Right now, I only have command-line ...
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1answer
303 views

Who sets NFS modification time - client or server?

I was curious about what exactly time is going to NFS file metadata when client writes a file. My assumption is that client time is recorded and not NFS server's time. But I wasn't able to find out ...
2
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1answer
538 views

What NFS hosting services exist?

My situation: I manage a small business, and would like to migrate the files on our local file server to a 'cloud' service. There are a large number of 'file storage' and 'file hosting' services (S3, ...
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2answers
3k 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 ...
2
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1answer
415 views

Portmap and NFS4

Is the portmap service required on a ubuntu machine - when i'm using NFS4 mount only - when i'm exporting files using NFS4?