iSCSI + GFS for web servers

[Steven Jones]

Hi,


I run a glusterfs 1 TB raid 1 solution replicated across 3 nodes using Dell SFF 990 desktops (so a 250gb OS disk and a 1tb data disk in each). Its cheap (they cost me $200 each, low energy - they use 29watts each) and simple to set up.   I have used openfiler, freenas and frankly I will never go near them again.


I did some googling, not much of a response on the method / combination you want to use. That means it looks like you are on your own, which does not bode well for setup success or future support help if it goes to custard.


Good luck.


regards

Steven


________________________________
From: ubuntu-users-bounces at lists.ubuntu.com <ubuntu-users-bounces at lists.ubuntu.com> on behalf of Mark Haney <mark.haney at vifprogram.com>
Sent: Wednesday, 3 February 2016 2:18 a.m.
To: Ubuntu user technical support, not for general discussions
Subject: Re: iSCSI + GFS for web servers

Yes, I know there are many ways to deal with this situation.  I've managed Petabyte SANs before for NOAA.  This isn't a situation that requires a PB level solution.  We're looking at a TB tops within the next 24 months based on current baseline data.  With that said, I'm not really looking for a storage cluster as much as I am storage being accessed by multiple servers that just happen to both be web servers.  I considered using FreeNAS, but it's almost verboten to use virtually.  I was going to use OpenFiler, but there are many posts concerning it's future development and it's very slow release cycle.

So, it made sense to me to just build a Ubuntu VM with LIO and GFS2 on it, so that both web servers can access user created content from a central location.  Google has been somewhat helpful, but only significantly for RH based VMs.  While I can certainly throw in a RH server for this, I'd prefer to keep things simple and keep things All-Ubuntu if possible.  That's why I asked this list.

Is it not possible to use iSCSI for multiple servers to access a GFS volume on that server and have Server A see new files uploaded by Server B without the need to the web front ends to build a 'cluster' for the storage?  I never had to do that with GFS1 that I can recall.

I thought this might be a simple question to ask, but either I asked it very wrongly, or no one has set up a design like this before using Ubuntu.


On Mon, Feb 1, 2016 at 6:58 PM, Steven Jones <Steven.Jones at vuw.ac.nz<mailto:Steven.Jones at vuw.ac.nz>> wrote:

Hi,


I can see what you are about and its similar to what I assumed, I still have reservations on using iSCSI.    There are several ways to skin a cat.

MANAGING UNSTRUCTURED DATA AT PETABYTE-SCALE<http://www.storageconsortium.de/content/sites/default/files/downloads_registrated/RedHat_2013-11-14-RHS-SC-D%C3%BCsseldorf.pdf>
www.storageconsortium.de<http://www.storageconsortium.de>
MANAGING UNSTRUCTURED DATA AT PETABYTE-SCALE Joachim Schröder Manager Solution Architects, DACH Email: joachim.schroeder at redhat.com<mailto:joachim.schroeder at redhat.com> November, 14th 2013


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