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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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
23 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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16 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 ...
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1answer
66 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 ...
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1answer
32 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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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
120 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 ...
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1answer
133 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 ...
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1answer
76 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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3answers
99 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 ...
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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 ...
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0answers
48 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 ...
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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 ...
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0answers
42 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 ...
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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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2answers
48 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 ...
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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
77 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
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1answer
34 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 ...
2
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0answers
43 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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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
49 views

How to unconditionally map UID/GID of all clients to those set by NFS server?

I have a virtual machine with Ubuntu 12.04. On this machine I have a directory that I want to advertise to the external world via NFS: <PATH> ...
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1answer
28 views

Which match takes precedence when exporting an NFS share?

Say you're exporting an NFS share using IP addresses and netmasks to give different machines different permissions: [/etc/exports] /media/shared 192.168.0.64/26(rw,[...]) 192.168.0.0/24(ro,[...]) ...
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1answer
82 views

NFS fails to mount through openvpn tunnel

I am trying to establish an nfs connection through an openvpn tunnel. It really anoying and i dont know what to try next. The connectein test has been made on several platforms now. used ...
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1answer
37 views

chown on items in nfs mount get wrong user

I have an nfs share mounted on my linux box. If users create files or directories, everything works fine and the newly created item is owned by that user. However if root goes in and does a chown on ...
0
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1answer
199 views

Why do some host volumes in Docker containers give the error “too many levels of symbolic links”?

I'm running docker with a host directory mounted: $ docker run -v /usr/groups/thing -ti imagename /bin/bash Files in /usr/groups/thing/foo are accessible: # ls /usr/groups/thing/foo a b c But ...
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0answers
27 views

Windows: Automounter daemon for NFS?

Unix has autofs for automounting NFS. I find it wonderful to be able to: cd /nfs/my.nfsserver.example.org/exporteddir/mydir and have autofs lookup the DNS name my.nfsserver.example.org, mount ...
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0answers
34 views

NFS Datastore Disconnects When sVmotion Migration is Attempted

I have a EMC VNXe 3100 and I had tested both iSCSI and NFS connections from it to my hosts, with NFS appearing to be the better of the two. So I set it up and in my testing with 1 VM everything ...
0
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0answers
89 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% ...
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2answers
135 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 ...
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0answers
86 views

Mount NFS share and symlink it to a directory using non-Administrator account

I'm on Windows 8.1 Enterprise and what I'm trying to do is to have a python script that will: Mount an NFS share for the current user Create a symlink in the current working directory to a drive ...
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1answer
79 views

Shared /home with NFS: chown /home/userdir to a user that doesn't exist on the server

Let's say I have a NFS /home on my server that gets mounted on boot by clients (EDIT: on their own machines -- locally), in order to have a common /home for my clients, this way they automatically ...
0
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1answer
41 views

NFS permissions on a directory

I feel stupid not knowing this, but alas, I need to ask. I have a few directories being automounted via NFS on my CentOS boxes. Source is a Dell NAS or Openfiler (which we are working on migrating ...
0
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1answer
168 views

NFS lock not working properly

I'm getting the following error on an oracle database. ORA-27086: unable to lock file - already in use It tries to lock a file that resides in an NFS mount. The NFS is on a loopback setup (long ...
0
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1answer
971 views

Since Upgrading NFS and Ubuntu to 14.04, All NFS Mounts Are Failing

Since upgrading my Ubuntu Machine, all my NFS mounts are hanging. I checked the syslog, and I'm seeing this now: Sep 29 04:29:10 ip-10-10-10-10 kernel: [ 9589.594814] RPC: AUTH_GSS upcall failed. ...
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2answers
120 views

EC2 autoscalling and code deployments

I'm just starting with EC2 load balancer and trying to implement autos-calling and fault-tolerance. The database is hosted in RDS, sessions are shared, files are shared using S3. I can't seem to ...
5
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3answers
101 views

Shared Disk in modern data center (SAN, virtualization, etc)

I'm a developer...treading here on foreign terrain. Please pardon any naivete. I work on an application that stores data both in a database and the filesystem. Context: Clustering and Network ...
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0answers
28 views

Is it possible to make the NFS server and client work in single threaded mode?

Do we have any configuration file, so that it might be possible to make the NFS server and the client to work in single threaded mode ?
4
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5answers
232 views

Requests take a really long time from certain ISP

We have an Apache server with PHP running on a virtual machine. Document roots are inside the users' home folders (/home/users/{first letter}/{username}/), and /home/users/ is mounted over NFS. It ...
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1answer
34 views

Combining two conditions for configuring NFS Server

Linux newbie here! Having a bit of trouble with writing the NFS config. I want to allow /directory/somedirectory to be accessed (read/write permission) to users that are part of 'group1' AND are also ...
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1answer
111 views

External HDD ESXi VM Snapshot backups

I have a couple of ESXi hosts running a few servers on each and would like to backup to my external drive plugged into one of my hosts. I have setup ghettoVCB scripts on each host with a list of my ...
0
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1answer
60 views

How to use LWRP on in AWS OpsWorks?

Ohai, ist there a way to use LWRP for Chef on AWS OpsWorks? How else would I execute this: nfs_export "/exports" do network '10.0.0.0/8' writeable false sync true options ['no_root_squash'] ...
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0answers
144 views

LDAP authentication, pam_mkhomedir and NFS automounted homes

We currently have a setup (running on Ubuntu 12.04.5 LTS) with mixed LDAP/NIS authentication and automounted home directories from several servers (with the auto.home map distributed over NIS). ...
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0answers
44 views

Setting quotas from a Linux client on a SmartOS (OpenSolaris) based ZFS server

I have a SmartOS (an OS based on OpenSolaris) server running a few virtual machines. One of the ZFS volumes is shared as an NFS volume and mounted on one of the VMs which is running Debian wheezy. ...
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1answer
195 views

NFS client does not pick up server after restart

EDIT : To summarize the issue, this is a problem with the NFS server changing IP address and the NFS clients not picking up the new address. I can see via tcpdump that the client still tries to ...
1
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1answer
606 views

Can’t mount NFS share from linux server on windows

There is a linux server supporting NFS v3 and 4, and a virtual machine with WinXP running a client service for NFS. XP can ping the server, but cannot mount NFS shares. From /etc/exports: ...
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0answers
159 views

NFS Synology NAS share serves wrong permissions

We have this really weird issue where the permissions on a file on an NFS share show unix permissions of 000 until I stat the directory that the file is in. For instance, if I run: while true do ...
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0answers
82 views

LDAP user's NFS files are mapped to nogroup (user ID mapped correctly)

In my office environment, I have set up multiple Ubuntu machines with LDAP authentication using the LDAP & NFSv4 server hostS. The LDAP/NFS server hostS exports the /home directory for all users ...
4
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1answer
160 views

File is different when read from NFS server

So I have a backup server we've been using for some time, it's a FreeBSD server running zfs and serving it over NFS. The export is simple: /backup/vm -maproot=root -alldirs. If relevant, that was ...