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2 Standalone Servers and HA

Rgomes
Valued Contributor

2 Standalone Servers and HA

Hi,

We have 2 Proliant DL-series servers. One of them is running MS-SQL database. How can we achieve high availability of this database by VMWare.

I read, vmware cluster can do this but is it without any central (SAN) storage?
What are the VMWare software I should look for?

TIA.

Rgds,
Richard
9 REPLIES
Michal Kapalka (mikap)
Honored Contributor

Re: 2 Standalone Servers and HA

hi,

check the HP VSA.

mikap
Michal Kapalka (mikap)
Honored Contributor

Re: 2 Standalone Servers and HA

hi,

you could have the data stored on some NFS server or ISCSI server.

mikap
Rgomes
Valued Contributor

Re: 2 Standalone Servers and HA

Hi Mikap,

But will NFS or iSCSI provide that kind of high availability that VM cluster can give.
Automated failover?

Rgds,
Richard
Jan Soska
Honored Contributor

Re: 2 Standalone Servers and HA

if you want have HA based on vmware products, you need:

1) at least 2 ESX servers with HA availability (where run VMs)
2) vCenter server which manages HA
(vmware offers bundles for your case there is Essentials Plus Kit, check http://www.vmware.com/products/vsphere/buy/small_business_editions_comparison.html )
3) shared storage between ESX servers - SAN, iSCSI, NFS (not very suitable for real production but will work)

vCenter server could run as VM, so you need at least 2 real servers.

This setup solved HA for your servers - will protect from hardware failure. BUT remember, server could die from internal software problems (OS patches/failure, DB failure) so backup and backup and buckup... :)

Jan
Rgomes
Valued Contributor

Re: 2 Standalone Servers and HA

Hi Jan Soska,

Thank you for your email.
I got uninspired when I saw your item#3, a shared storage.
We do not have any external storage, which can be used as shared storage for these two servers. Isn't it possible without shared storage.

I know it is design level issue, without any shared storage, common data won't be possible.

However, let me know.....

Rgds,
Richard
Michal Kapalka (mikap)
Honored Contributor

Re: 2 Standalone Servers and HA

Hi Jan,

3) shared storage between ESX servers - SAN, iSCSI, NFS (not very suitable for real production but will work)

We have very good exeperieneces with iSCSI tested 2 nodes HP Lefthand alias P4000

And also we tested the NetAPP iSCSI / NFS,
without any problem in real production.

Now we will implement the Vmware solution for our customer ESX + SAN storage ( Symmetrix DMX ).

iSCSI is very vell if you dont have exisiting SAN infrastructure if yes i would recommend to use SAN instead of ISCSI.

Of course this is only my personal opinion.

mikap

Uwe Zessin
Honored Contributor

Re: 2 Standalone Servers and HA

> to use SAN instead of ISCSI.

iSCSI is a SAN protocol.
.
Jan Soska
Honored Contributor

Re: 2 Standalone Servers and HA

To Michal -
it is misunderstanding, I ment NFS is not very suitable for production env... ;)
I do not have problem with FC or iSCSI SAN... :)

Jan
Michal Kapalka (mikap)
Honored Contributor

Re: 2 Standalone Servers and HA

hi,

more about iSCSI can be found in RFC.

http://www.ietf.org/rfc/rfc3720.txt

mikap