0
votes
1answer
57 views

Mounted gluster volume only accessible by root

I have a 2-node cluster with each node having two HDDs. The home directory of mpiuser is shared between the nodes via NFS(Used guide here). The 2nd HDD of each node was used to create a gluster ...
0
votes
0answers
19 views

How to make shared space from HDDs of nodes in a cluster?

I have a 2-node cluster with each node having two HDDs. I want make a scratch space common to both nodes using the second HDD of each cluster. I mounted the 2nd HDD of master node as /home and have an ...
0
votes
1answer
33 views

Process can't see recently created symlink on NFS

I have a small amount of old ubuntu desktops connected by a switch acting as a mini test cluster. The workers take commands from a master node via the SLURM queue manager. They share a data mount and ...
1
vote
1answer
140 views

Is it possible to speed up network filesystem by sth like unionfs, aufs?

I need to speed up slow, large storage with local SSD drive. I figured out I could do this with union filesystems. Here are results with nginx reading data from: local SSD alone: ~140 ...
2
votes
1answer
246 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 ...
0
votes
1answer
214 views

NAS server freezes in cluster environment using NFS

In our department we have an Iomega NAS (px4-300d) connected to a Supermicro cluster with 5 nodes (12 cores per node). Each node mounts a share on that NAS by using NFS. Unfortunately after some time ...
2
votes
1answer
395 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 ...
1
vote
0answers
246 views

I'm building a diskless php-fpm cluster, unpredictable /etc/statetab and looking for other building strategy

I'm building a 24 nodes php-fpm farm using three Supermicro MicroCloud (8 nodes in 3U, nice and tight) At first, I was planning to have each of them nodes have a disposable HDD with CentOS on (6 or 5 ...
3
votes
1answer
1k views

High Availability NFS Server (Heartbeat/DRBD) long hang on clients when takeover occurs

We have a High Availability NFS environment using DRBD, heartbeat and nfs exposed to clients (Simular to the following https://help.ubuntu.com/community/HighlyAvailableNFS ). This seems to be a ...
-2
votes
1answer
215 views

Setting up a low cost development cluster with (possibly) diskless slave nodes [closed]

Consider the following: I (hypothetically) have one heavyweight server/master node with a couple disks in it and a group of lightweight diskless clients/nodes on a 10 gigabit LAN. The server is ...
1
vote
1answer
96 views

Handling log and configuration files when load balancing apache

I asked this question on Stack Overflow, then I released that serverfault would be more appropriate, I apologize if anyone stumbles upon these two issues. So, I am currently rebuilding my web ...
1
vote
1answer
1k views

setting up a high speed load balancing server cluster - web/db/NFS

I'm looking for advice on the best way (mainly in terms of hardware) to set up a high speed load balancing server cluster on a budget (say £2,000 - £ 3,000) to host web services behind a single ip ...
5
votes
3answers
795 views

Need suggestions for a R/W distributed file system for a webserver cluster running Apache+PHP

In the last few months, I've been trying to find the best way to share the content of multiple websites across multiple web servers (12+) all running Apache+PHP. One of the biggest challenge I face is ...
0
votes
3answers
293 views

could a NFS volume export to VMWARE ESX used for Windows 2008 cluster?

Linux NFS export to VMWare ESX. Could this be used as shared storage for two Windows Virtual machines inside the ESX? "cluster in a box" "Windows 2008 R2 needs support for SCSI-3 persistent ...
2
votes
2answers
2k views

How to choose the number of nfsd threads

I have an 8-core linux-based server dedicated to serving NFS to 80 linux clients that run batch jobs. The clients have 400 cores in total, and so are generally running 400 single-core batch jobs ...
0
votes
2answers
775 views

RHCS 5 NFS cluster node not releasing TCP 2049 on relocate

Imagine if you will you have a 2 node Red Hat NFS Cluster; each node is RHEL5.4 64bit and they share a SAN LUN for the data. The primary interface on each server is HA failover bonded (bond0, ...
1
vote
1answer
7k views

What are the pros and cons of OCFS2 and GFS2 filesystems versus NFS?

We need to set up a SAN accessible from a bunch of computers, both virtualized and real. We have an iSCSI SAN and I need to ponder some of the options. What are the differences between GFS2 and ...