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xen-users
RE: [Xen-users] My future plan
Hi Rob,
Since this is just an idea at this stage, and that we are just
starting out, we want to build up our rack over time. The Dell R210 is the best
we can afford at the minute. Maybe, after the first 4 or 5 R210, I could look
into getting servers with Dual CPUs in them so more guests can run. Initally,
each server will be handling its own storage using RAID1.
The Dell R210s do come with dual on-board NICs, however I need one
of them for the internet connection, unless of course I used VLANs and just used
the on-board NICs?
I'm very confused about the RAID cards. I've never really worked
with these before, so all advice is appreciated. With the number of total VMs
running around 100, do you think I'll notice much of a difference between SATA
and SAS?
Thanks
From: Robert Dunkley
[mailto:Robert@xxxxxxxxx]
Sent: Tue 08/06/2010 15:56
To:
Jonathan Tripathy; Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE:
[Xen-users] My future plan
Hi
Jonathan,
The
NAS is using good components, make sure you get IPMI option if this is going in
a rack more than 5 minutes away from where you work. Ask Broadberry if they can
supply the newer SAS 6G expander version of that chassis and the newer 9260-4I
6G raid card (I’m pretty sure it a Supermicro approved card for that chassis),
with 16 drives 6G SAS may remove a potential bottleneck to the expander.
Also, consider 15K SAS for your high IO database and mailservers, a mix of
15K SAS and 7K SATA arrays might be appropriate.
Anything
but LSI cards often have issues with the LSI based expanders in those Supermicro
chassis, Areca do work with the SAS1 expander as long as SAFTE is disabled but
considering the expander I think LSI is the only advisable card
brand.
Any
reason you aren’t considering 1U servers with integrated Intel NIcs for nodes?
Often the best band per buck for nodes is with 1U Dual Xeon E55XX quadcore or
the new Opteron Octal/Dodeca core systems.
Rob
From: Jonathan
Tripathy [mailto:jonnyt@xxxxxxxxxxx]
Sent: 08 June 2010
15:38
To: Robert Dunkley;
Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] My future
plan
Do you have any links or anything for cards that you suggest?
I'm just a start-up to low cost is very much a good thing here :) But then
again, so is having my cake and eating it as well!!
That's a fantastic idea about the PXE booting! The only thing
though, is that Dell supply their server with a minimum of a single HDD as
standard, so there would be no cost saving there. And also, all the servers
would have to be the same.
My idea is that if this was to work out properly, I would get
servers better than R210, as these are limited to 16GB of RAM max..
From: Robert Dunkley
[mailto:Robert@xxxxxxxxx]
Sent: Tue 08/06/2010 15:36
To:
Jonathan Tripathy; Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE:
[Xen-users] My future plan
Hi
Jonathan,
Might
be worth considering a different raid card, even with simple raid 1 I did not
get proper raid 1 random read interleaving performance with an LSI 1068 based
controller (Assuming the 1078 is very similar), an IOP based Areca card behaved
properly (Only 30% improvement over single drive with LSI but 80% better with
Areca, simple Bonnie testing). I was using Centos 5.2 at the time (Integrated
drivers).
If
you are feeling brave maybe a PXE boot could work to save the need for any
system drives on the nodes.
Rob
From:
xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Jonathan
Tripathy
Sent: 08 June 2010 13:56
To:
Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] My future
plan
My future plan currently looks like this for my VPS hosting
solution, so any feedback would be appreciated:
Dell R210 Intel X3430 Quad Core 8GB RAM
Intel PT 1Gbps Server Dual Port NIC using linux
"bonding"
Small pair of HDDs for OS (Probably in RAID1)
Each node will run about 10 - 15 customer guests
Some Intel Quad Core Chip
LSI 8704EM2 RAID Controller (Think this controller does 3
Gbps)
Battery backup for the above RAID controller
4 X RAID10 Arrays (4 X 1.5TB disks per array, 16 disks in
total)
Each RAID10 array will connect to 2 nodes (8 nodes per
storage server)
Intel PT 1Gbps Quad port NIC using Linux bonding
Exposes 8 X 1.5GB iSCSI targets (each node will use one of
these)
HP Procurve 1800-24G switch to create 1 X 4 port trunk (for
storage server), and 8 X 2 port trunk (for the nodes)
What you think? Any tips?
The
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The
SAQ Group
Registered
Office: 18 Chapel Street, Petersfield, Hampshire GU32 3DZ
SAQ is the
trading name of SEMTEC Limited. Registered in England & Wales
Company
Number: 06481952
http://www.saqnet.co.uk AS29219
SAQ
Group Delivers high quality, honestly priced communication and I.T. services to
UK Business.
Broadband :
Domains : Email : Hosting : CoLo : Servers : Racks : Transit : Backups : Managed
Networks : Remote Support.
![SAQ Group]()
ISPA
Member
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