4
votes
1answer
92 views

Should new Linux VMs under ESXi 5.5 mount their filesystems with discard option?

When creating new Linux virtual machines using recent (>= 2014) distributions in VMware ESXi 5.5, should they mount their filesystems with the discard option ? I make the assumption that the VM's ...
1
vote
0answers
100 views

Network Block Device (NBD) clients for Windows or similar solutions [closed]

Are there any NBD clients for Windows? Strangely, I cannot find any, or I am searching for them in a wrong way. Such client should be possibly a driver with front-end tool (may be a command-line ...
2
votes
4answers
282 views

new hyper V High Avaliability setup and SMB 3.0 storage

I am looking at building an new 2012 R2 with Hyper V setup, everything has to be HP hardware. 2x HyperV 2012 R2 servers running 20-30 VMs. These will be dual 6 core xeons with 128gb of ram. 2x 2012 ...
4
votes
1answer
212 views

Optimization XFS on Linux guest in Hyper-V (VHDX)

In our company we're using Hyper-V (Windows Server 2012) hypervisor and VM to organize our in-company services in our data-center. I am supposed to set up Ubuntu 12.04 LTS guest for our main database ...
0
votes
0answers
36 views

How to benchmark a whole storage infrastructure

I'm a 100% sure that I'm not the first one to consider benchmarking a whole infrastructure, but yet I haven't found any relevant information on how to face this challenge. As I guess we all know what ...
0
votes
3answers
299 views

What are the benefits of having local disks on hypervisor nodes running VMs off a SAN?

When an hypervisor like XenServer or vSphere can be run on diskless nodes (eg. by booting from flash cards or from the network) and VM storage is handled via a SAN, is there any good use for local ...
0
votes
2answers
866 views

XenServer Shared Local Stage

I am new user of XenServer 6.2. I have multiple servers connected to Pool/Cluster. Each server has 4 HDD with sw raid10. I would like to make local storage shared because of need quick migration. ...
2
votes
1answer
156 views

Best practices on VM disk management

I'm replacing two old rack servers with a new one that has plenty of power to take over the functionality the current servers. The server is a 4U rack mount with 16 3.5" SAS drive bays, two 2.5" bays, ...
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 ...
2
votes
5answers
145 views

Provide iSCSI storage for Virtual Environments through host or directly to guests?

We are planning to place a HP MSA P2000 with two FC/iSCSI controllers in our network. We have two options to provide more storage to Virtual Machines (We are running Hyper-V): A) Add iSCSI targets ...
3
votes
3answers
1k views

Vmware Storage Appliance: Does It Deliver?

I'm on a tight budget and can't afford a SAN. I'm considering a Vmware Essentials Plus Kit deploy on 3 servers. This includes vSphere Storage Appliance. Vmware claims it will do what I need it to.. ...
1
vote
1answer
1k views

VMWare 5.1 Datastore in use when trying to unmount?

When trying to unmount a datastore from one of my 4 ESXi hosts, I receive a message that it's in use. The full error stack I see is: Call "HostDatastoreSystem.RemoveDatastore" for object ...
5
votes
3answers
703 views

Recommendations: configuring a 10GbE NAS stack for virtualisation storage

I'll try as hard as I can to word this so it is not considered a shopping list. We have been successfully running a dev/test ESXi environment for some time, with a couple of Dell PE2950III servers ...
2
votes
1answer
404 views

Configure Windows to Read/Write Shared SAN

I am working on building a NLB cluster to load balance for JavaEE portal. Both are Virtual Windows 2008 R2 and connected via Fiber Channel to an EMC SAN Storage. They should read/write files into the ...
10
votes
1answer
10k views

KVM and Libvirt - How do I hotplug a new virtio disk?

I am trying to hot-add a file-based disk to a running KVM virtual server. I've created a new disk from scratch using the command dd of=/home/cloud/vps_59/test.img bs=1 seek=5G count=0 and I was ...
0
votes
1answer
302 views

Generalized strategy for file server virtualization in Xenserver [closed]

I'm not shopping as much as I'm looking for some guidance on good idea / bad idea strategies. I'm sure I'm not in the "best practices" budget range. Currently, I have 3 dell poweredges running ...
0
votes
1answer
94 views

In storage virtualization, what is the difference between auto load balancing and auto-tiering?

It's my understanding that auto-tiering is storage optimization based on cost-savings. You put the most-used data on the most expensive devices and the least-accessed data on the least expensive ...
0
votes
3answers
80 views

Asynchronous Replication vs. Mirroring

In regards to storage virtualization, is 'asynchronous mirroring' and 'asynchronous replication' the same functionality? If not, what is the difference?
-1
votes
4answers
167 views

Xen virtualization NOT using a single centralized storage repo

I've been tasked with finding alternatives for storage VDIs and other underlying data in our Xen virtual machines. We currently use a NetApp filer cluster, but with the heads going EOL in December ...
2
votes
1answer
211 views

Sizing Switches for Storage and Production

Couple questions. Should you always completely separate the storage network switches from production switches or are VLANs fine to segment this traffic? Is there a golden rule here? How do you ...
15
votes
1answer
7k views

Hosting a ZFS server as a virtual guest

I'm still new to ZFS. I've been using Nexenta but I'm thinking of switching to OpenIndiana or Solaris 11 Express. Right now, I'm at a point of considering virtualizing the ZFS server as a guest within ...
0
votes
2answers
270 views

Shared storage between VMs

I am new to server administration and virtualization, and I have a couple of questions that I hope to get some help for. I have two server boxes that are of similar set up. The differences between ...
2
votes
1answer
133 views

Possible to use Azure xDrive (PageBlob) with on-premises Windows 2008R2

Azure's Windows 2008R2 based hosts currently use blob storage for something called XDrive. Since this is just a driver and a few other system components, has anyone figured out what files need to be ...
2
votes
1answer
421 views

ESXi: Allowing a guest OS to use other disk drives in server

I want to test a certain configuration on a new server that has 6 disks, configured as 2 virtual disks in RAID 1 and RAID 10 configuration. Configuration: 6 Total Disk Drives 2 x 250 GB RAID 1 ...
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 ...
2
votes
2answers
665 views

Can you detect partition misalignment from a VM?

First of all the back story - All of a sudden (literally overnight) an instance starts throwing CPU utilization alerts. This is a rather lowly VM (1 vCPU, 2GB RAM) but all it does is very low NFS ...
3
votes
2answers
2k views

Sheepdog versus iSCSI for KVM

What is recommended storage solution as VM count grows? We currently have 5 VM servers (8 core, 32GB) and one storage server. Currently we have ~80 virtual machines running and the storage server's ...
2
votes
1answer
1k views

vmware esx 4.1 cant see existing SAN storage

I have 3 esx 4.1 hosts connected to HP EVA 4400 StorageWork. All host can see 6 datastore, LUN1 to LUN6, 1TB for each datastore. Recently I add another esx 4.1 host but unfortunately this now host ...
9
votes
4answers
947 views

Advantages of thick provisioning of storage over thin provisioning with virtual machines

I typically use thin-provisioning of storage space when building VMs: it provides a lot of flexibility, and seems to be faster to build. The only potential definite advantage I can see is to ensure ...
0
votes
2answers
472 views

Seagate Momentus XT for Hyper-V [closed]

Has anyone tried these hybrid drives for virtualization? (More specifically Hyper-v + Raid or JBOD). I'm interested in how it performs as I'm running a few servers at home, and the disk I/O is killing ...
-1
votes
1answer
184 views

virtualization platform: Ubuntu + KVM/Xen

performance and feature set offered by the latest Ubuntu 11.04? while it works best as virtual workstation with direct attached storage, what is the tool-stack offered for server virtualization ...
1
vote
1answer
112 views

Hyper-V Development Server - best 4 drive configuration?

We're building a development Hyper-V server that will be shared among 4-6 .Net developers. We'll be running mostly Win2k8R2 VMs with services including MSSQL, SharePoint, TFS, continuous integration, ...
3
votes
4answers
379 views

Virtual SAN hardware and software

We are looking into SAN storage. I have been reading up on it for the last couple of months. We will probably purchase some consulting. For the time being, can anyone suggest a way I could ...
0
votes
1answer
121 views

LUNs and snapshot pool size

Typical mail server, let's say 20GB of mails, partition size 100GB. I'm transferring to a LUN on shared storage P2000 and designing the whole thing. What it is typical snapshot size in this situation ...
6
votes
5answers
790 views

LUNs and virtual machines

I have HP P2000 + XenServer solution working. What I'm thinking about is how to create LUNs for 20 virtual machines. Separate LUN for every VM ? It gives me ability to backup the specific virtual ...
1
vote
1answer
438 views

Shared storage for VMs without dedicated storage server

On a legacy project I've got 4 physical machines (servers, PM's) where each server has access to the SAN and fixed-space by it's own two devices (via device-mapper multipath). The local disks of the ...
-1
votes
2answers
122 views

Hard Disk Speed for Virt Laptop [closed]

If I want to run a few dev VMs on a laptop, how fast do my drives realistically need to be? I do not expect lightning fast performance, but the last time I tried this on a Lenovo Thinkpad T400, ...
2
votes
2answers
2k views

Free tiered storage automation in linux?

I have a couple virtualized fileservers running in QEMU/KVM on ProxmoxVE. The physical host has 4 storage tiers with significant performance variances. They're attached both locally and via NFS. ...
0
votes
2answers
83 views

Running VMware Virtual Machines on a Workstation machine

HI there! I've got a much deeper question regarding VM architecture, but need to ask this first. For cost-saving as well as power-saving, I am thinking of having 3 VMs (1 Trixbox CE, 1 Windows 2008 ...
2
votes
1answer
826 views

Looking for advice on Hyper-v storage replication [closed]

I am designing a 2-host Hyper-V R2 cluster with 6-10 guests stored on a SMB iSCSI SAN device (probably Promise VessRAID). I will be getting at least two of the SAN devices and need to eliminate the ...
1
vote
2answers
2k views

VMs on SAN vs NAS

I'm about to deploy XenServer on a DELL R900 and haven't finalized on the Storage yet. Would typically be running like 40 VMs on the server with requires about 2TB of storage. What should I choose ...
4
votes
3answers
997 views

Recommendation for a small redundant VM infrastructure?

We currently have an active-active 2 node cluster running virtual machines. Every node has two disks, every disk is DRBD mirrored on the other node. Every node runs virtual machines out of his primary ...
6
votes
4answers
329 views

Is DAS OK for under-utilised virtual machines?

We're a little behind in the virtualization game, I'll have to admit. We currently have nothing virtualized, but I'm trying to change that. We want to get our feet wet with virtualization and get a ...
0
votes
2answers
772 views

General question about RAID configurations, specifically nested RAID 50

I understand about the different types of RAID configurations: RAID 1 -- Mirror [Redundant] RAID 0 -- Stripe [Performant] RAID 5 -- Hot Spare [Redundant] From what I understand, RAID 1 gives you ...
1
vote
2answers
1k views

How can the “actual” size of VHD/VMDK files be reduced after deleting unwanted files?

Somewhat akin to this question I asked on superuser, and this one for Hyper-V, after deleting files from a VM, how can the virtual disks be resized back downwards? For example, perhaps the VM has ...
7
votes
6answers
3k views

hardware recommendations for a DIY storage system based on ZFS [closed]

Looking to make use of old server lying idle as a proof-of-concept ...here are specs Dell PE 2900: Xeon 5110 - 2P, 12 GB RAM, 8x 300 GB 15K drives, Perc 5i+256 MB cache what additional h/w would be ...
0
votes
1answer
453 views

Storage replication/mirror over WAN

We are looking at storage replication between two data centers (600km apart) to support an active-passive cluster design for disaster recovery. The OS layer will be mostly Windows Server 2003/2008 ...
2
votes
5answers
5k views

VMWare ESX, storage over 2TB

First of, i'm a webdeveloper and my server experience lies in setting up FreeBSD servers for webserver. I'm working on a project for at photographer, and i'm hired to develop a new online photo ...
0
votes
1answer
146 views

Adding new virtual disks to a Windows host in ESX “live”

Building on my previous question about RHEL, how do you add get the guest OS to recognize that you've added new drives to it without a reboot? I have Windows 2003, XP, and 2008 guests running on ESX ...
4
votes
2answers
180 views

Storage sizing for virtual machines

I am currently doing research to determine the consolidation ratio my company could expect should we start using a virtualization platform. I find myself continually running into a dead end when ...