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
2k views

ZFS - destroying deduplicated zvol or data set stalls the server. How to recover?

I'm using Nexentastor on a secondary storage server running on an HP ProLiant DL180 G6 with 12 Midline (7200 RPM) SAS drives. The system has an E5620 CPU and 8GB RAM. There is no ZIL or L2ARC device. ...
10
votes
5answers
7k views

Best filesystem choices for NFS storing VMware disk images

Currently we use an iSCSI SAN as storage for several VMware ESXi servers. I am investigating the use of an NFS target on a Linux server for additional virtual machines. I am also open to the idea of ...
5
votes
6answers
8k views

Is there a way to do something like LVM over NFS?

I realize that since NFS is not block-level, LVM can't be used directly. However: is there a way to combine multiple NFS exports (from, say, 3 servers) into one mount point on a different server? ...
7
votes
3answers
1k views

What is the use-case for NAS on a mid-to-high end storage array?

Many large storage vendors (EMC, NetApp, etc) provide storage equipment that does NAS in addition to FCP, FCoE, or iSCSI. When would it be appropriate to use the NAS functionality of these boxes? In ...
7
votes
3answers
5k views

Combined NFS, Samba server w users from Active Directory

I want to build a server that exports user home directories over SMB/CIFS and NFS. This server would be joined to a Win2k3 AD domain controller that holds our user database. As I understand it, ...
4
votes
1answer
3k views

NFS - Files on client are not appearing on server

Heres my set up: One NFS Server machine, two NFS client machines. The client machines write files to the NFS mount, but occasionally, the files don't appear on the NFS Server machine or other client ...
4
votes
2answers
4k views

NFS Caching Issue

We are having an issue that happens intermittently during a code deployment. NFS caches the files as they are read, but if a file is read during a code deploy it stays in a dirty state as if the file ...
6
votes
4answers
1k views

Crontab running before nfs mounted

Running Cronjob @reboot returns that file on nfs share does not exist. Example @reboot python /abs/path/to/script.py mail from crontab on startup reads "more or less" /usr/bin/python can't open ...
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votes
6answers
20k views

How should I copy my VM templates between vSphere datacenters?

Background/Environment Architecture: My current environment for $corp_overlords$ is set up in a hub-and-spoke model with a technologically well-endowed home office hub (SAN, bladecenter/bladesystem ...
16
votes
3answers
64k 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 ...
8
votes
5answers
21k views

What does 'no locks available' mean?

I'm trying to commit to a SVN server. On the server the subversion repository is NFS mounted. When doing a commit, I get this error message: svn: Can't get exclusive lock on file '/svn/repo/db/...
4
votes
5answers
5k views

MySQL 5.1.34 on NFS w/NetApp

Is this still a bad idea? I know older versions of MySQL performed poorly with NFS. I imagine the issue lies with the usage of fsnc() and/or O_DIRECT. If the issues are mostly resolved, are there ...
0
votes
1answer
87 views

Advantages and disadvantages of each type of layout in pNFS

As I know, Parallel NFS (pNFS) has three types: file layout, block layout and object layout. What are the advantages and disadvantages of each type?
0
votes
2answers
696 views

Running NFS with iptables, change firewall?

I have a number of web servers on which I've set up iptables as the firewall, this is working great. However, I also have a dedicated file server running NFS and I need to firewall this machine as ...
6
votes
1answer
663 views

Slow copying between NFS/CIFS directories on same server

Please bear with me, I know it's a lot to read. This problem may be applicable to others, so it would be great to have an answer. I had to give away the bounty because it was going to expire. When I ...
0
votes
1answer
5k views

Can NFS be forced to refresh stale files/directories when not using noac on the mount?

We mount without using noac. I have a file that I append to once every 20 minutes. Then it will be read with mmap about 5,000 times a minute. We only mmap a couple blocks for each read. Needless to ...
20
votes
9answers
25k 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 ...
24
votes
3answers
165k 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, ...
24
votes
1answer
7k 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 ...
16
votes
4answers
14k 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 ...
6
votes
2answers
2k views

How to set i/o priority for nfs client processes?

The configuration is: A linux server and a nas box (netgear) acting as nfs server. It is easy for a single process on the linux server to use all i/o bandwidth by simply copying a file from the nfs ...
6
votes
3answers
5k views

Vagrant OS X host nfs share permissions error - Failed to set owner to '1000'

I am a Vagrant and Puppet newbie, I have created a Base Box with Debian Squeeze plus standalone Puppet, using the instructions here to install Puppet with the Puppetlabs packages. The box itself ...
4
votes
6answers
1k views

Which storage protocol to use for ESX storage?

What storage connection method should one prefer to use for connecting ESX servers to a shared storage server with 10GbE links? Speficically, I have 2 ESX servers for VMware ESX and one server for ...
1
vote
2answers
14k views

Problem with NFS server lockd timing out on Debian linux

We've recently upgraded an NFS server (called "ian"), and after the upgrade, NFS is broken, whereas it wasn't before. The server is now running Debian "lenny", with kernel version 2.6.26-2; it's a ...
10
votes
4answers
11k 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....
4
votes
4answers
11k 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 ...
1
vote
3answers
5k views

Auto-mounting a windows share on Linux AD login

I've managed to configure my test Ubuntu 10.04 Beta 2 Server VM to accept logins (via ssh) from users who have domain accounts in active directory via Kerberos, nsswitch.conf and PAM configurations. ...
5
votes
1answer
721 views

Why is rpc.lockd obscured from netstat/lsof output?

Prologue: On a number of machines, which happen to act as NFS clients, netstat reports two ports that are open with no PID listed for an associated daemon. Ordinarily this might be a bit concerning. ...
2
votes
4answers
887 views

Is it possible to view the contents of an underlying NFS mount without unmounting the NFS content?

I have a shared directory on a server - let's call it /home/shared - which is mounted with content from another server via nfs. When it is unmounted /home/shared is supposed to be empty - however, ...
2
votes
3answers
5k views

How can I improve NFS performance on a gigabit LAN?

I have a Solaris 10 server with a Mac OS X clients on a gigabit LAN. The Solaris server exports a RAID-Z backed NFS share and all the clients connect to it. However, transferring files is slower ...
2
votes
2answers
838 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?
1
vote
4answers
10k views

Mapping UIDs for NFS

I have a Mac OS X file server that serves via SMB/CIFS and AFP. The server is a domain client via the golden triangle approach, but this results in a very large UID for the users. This is fine for ...
1
vote
3answers
2k views

rsynced files not getting proper ACL

I use rsync (rsync-3.0.6-5.el6_0.1.x86_64 on Scientific Linux 6) to transfer files from a VFAT disk to an NFS mounted ext3 file system. I have ACLs set up on the ext3 system and all works as expected ...
1
vote
3answers
3k views

NFS Over OpenVPN: Top Performance Boosters

I have two VPS's - One is running 2008 Server R2 and the other is a Ubuntu 12.04 installation. I am using the Windows VPS for RD sessions for Quickbooks and a couple other apps and using the Ubuntu ...
1
vote
0answers
13 views

Comparison between performance of block layout, file layout and object layout of pNFS [duplicate]

As I know, there are three type of pNFS: file layout, block layout and object layout. So, between these types, which layout reach the best performance and which layout has the worst performance.
9
votes
4answers
3k views

Fault-tolerant NFS?

Probably a FAQ but I haven't found anything useful after a while of searching: Can I set up NFS in such a way that every single error (e.g. server CPU, hard disk, hd controller, network adapter, ...
9
votes
4answers
19k 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?
7
votes
7answers
13k 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 ...
4
votes
3answers
8k views

Any Problems with many NFS mounts?

We are currently considering a solution that results in a separate mount point for every user's home directory. Whereas we used to have at most a couple mounts per file server on a client, we now ...
4
votes
2answers
10k 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, ...
4
votes
3answers
14k views

centos 6 nfs: logs not showing anywhere

Can someone please tell me where NFS logs in centos 6? Or perhaps where I can tell NFS to send logs? At the present time, there appears to be no such setting. Trying to get the thing to work without ...
3
votes
1answer
6k 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 ...
2
votes
4answers
5k 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 ...
2
votes
3answers
4k 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: net.bridge.bridge-nf-call-...
1
vote
3answers
385 views

Reporting Penetration Attempts to My Server

I need a log file of penetration attempts to my server. Ideally, this log should contain all attempts including logins, HTTPD activities, FTP activities, NFS, and other conventional open ports. ...
1
vote
1answer
2k views

Why Permission Denied with NFS after reboot?

I have Ubuntu and CentOS clients nfsv3 mounting to a FreeBSD box, which got rebooted while the nfs clients were connected. Now the clients get a permission denied when they try to access the mount ...
1
vote
2answers
4k views

NFS from Windows Server 2008 R2

I have a Windows [Web] Server 2008 R2 from which I need to mount an NFS share on a Linux machine. The Windows help refers to "Services for Network File System (NFS)" under Administrative Tools, which ...
0
votes
2answers
4k views

No acl on nfs mount in linux?

I have several RHEL6 machines. One is exporting an nfs mount to the rest. I have ACL's set on the server (set using setfacl -m), but none of the clients are seeing any of them. Here is my export on ...
6
votes
4answers
2k views

DRDB and NFS: is there any efficient way to make failover transparent for NFS

We are implementing DRDB + heartbeat with two servers to have a file system with failover. These servers exposes a NFS service for other servers Currently DRDB is working just fine, but when testing ...
6
votes
2answers
2k 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 ...