5
votes
1answer
537 views

Gluster + ZFS, deadlock during benchmarking: zfs_iput_taskq 100% cpu

First some background: I work at a company that runs a PHP-webapplication. We have a storage backend mounted over NFS on several webservers. Today we have the issue if one webserver writes a file over ...
3
votes
1answer
116 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 ...
0
votes
1answer
66 views

Consequences of exposing VM storage on same subnet as VM's and hypervisor

I recently purchased a RAID array to store my VM's and segregate the storage from the host machine. Since my needs are pretty simple I've configured the VM's to bridge with the host network (I think ...
1
vote
1answer
132 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
574 views

NFS mount has stopped working on ESXi

We have had around 20 hosts connected to an NFS share running from an Ubuntu server. The other day they all lost connection. We have rebooted the NFS server to rule out any services going funny. When ...
1
vote
2answers
2k views

Determining cause of high NFS/IO utilization without iotop

I have a server that is doing an NFSv4 export for user's home directories. There are roughly 25 users (mostly developers/analysts) and about 40 servers mounting the home directory export. ...
4
votes
4answers
2k views

Slow NFS and GFS2 performance

Recently I've designed and configured a 4 node cluster for a webapp that does lots of file handling. The cluster have been broken down into 2 main roles, webserver and storage. Each role is replicated ...
1
vote
2answers
2k views

XenServer/Center: Shared SRs for hosts not in same pool?

I would like to use the same SRs on XenServer hosts that are not able to be part of the same pool (because of not having the exact same cpu feature set, if I understand it correctly) in order to share ...
0
votes
3answers
284 views

Best way to safe store data on several servers?

I need to store 100+ tb data on several servers, so I understand this is possible with distributed file systems. I also need the system be fault tollerant. So if one server is down, I do not want ...
14
votes
5answers
967 views

Choosing a SAN technology for 100s of VM Web Servers

The Problem We have an issue with performance on an existing platform, so I'm turning to the hive mind for a second opinion on this. The performance issue so far relates to IOPS rather than ...
3
votes
5answers
2k views

Would using SAS disks instead of SATA disks make sense over NFS for a VMWare datastore?

We are deciding whether to use SATA or SAS aggregates on our Filer for our VMWare datastore. We will be using NFS to connect the VMWare hosts to storage. Doesn't seem to make sense to use SAS disks ...
0
votes
3answers
667 views

Best way to share storage between multiple computers

I need to provide shared storage for multiple application server nodes in a cluster in a Linux environment. In other words, each of the nodes in my cluster needs to be able to read/write files to a ...
1
vote
2answers
115 views

At what workload is a parallel (network) file system required?

Any hard numbers, or rules-of-thumgs, for what workload (e.g. in terms of simultaneously active users running average HPC center jobs) on a computer cluster, that would make a parallel network shared ...
0
votes
2answers
215 views

Consolidating storage on multiple VPS instances

Say you have four VPS instances running. One is an nginx proxy which handles requests for your two middle layers VPS instances running a web app via FastCGI and the final VPS is running the database. ...
2
votes
2answers
696 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?
1
vote
2answers
859 views

Best practices for mounting Sun SAN NFS on Linux (Debian Squeeze)

Anyone got bestpractices for how to mount a nfsshare from Sun(Oracle) Unified Storage? We run the usual hard and nfs4 on debian squeeze. We run our VMs through this NFS share with Xen. When our SAN ...
4
votes
2answers
1k views

How to QoS NFS?

I have the following NFS-based storage setup: Computes nodes are Linux. The NFS servers are Solaris. A not-so-important user runs a bunch of read intensive jobs on a subset of the compute nodes. As ...
1
vote
2answers
420 views

XenServer questions

my minimalistic configuration is composed of 1 storage + 2 XenServer in a pool. My questions: 1) Will HA work in this configuration? 2) What is better for HA, connection with the storage by iSCSI or ...
0
votes
1answer
183 views

Simple Central Storage for HA mail server

I will have 2 Postfix servers. One will be a backup of the other. What is the easiest method to provide central storage to both of these boxes? My infrastructure is very simple: Just a lot of Xen ...
0
votes
1answer
526 views

recommendations for unified storage using commodity hardware, opensource software

updates: from the below answers from "Chopper3", its possible to connect to HP MDS600 JBOD using HP DL server with a RAID controller card. Multiple servers can connect to MDS600 array; create volumes, ...
10
votes
9answers
18k views

What is the “real” difference between a NAS and NFS? Or, why pick a NAS device over “mere” NFS? [duplicate]

From an end-user perspective, what is the difference between a NAS device and using NFS exports from a file server? They seem to accomplish the same end result. The difference between a SAN and ...
2
votes
5answers
773 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 ...
5
votes
6answers
5k 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? ...
2
votes
4answers
3k views

Fastest way to share a Solaris (ZFS) file system with two windows servers?

I am setting up a 16TB Storage server (which will eventually double in capacity) to store media. This server needs to be read from by two windows server 2008 clients which host our companies ...