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тАО07-31-2010 07:31 PM
тАО07-31-2010 07:31 PM
2 Standalone Servers and HA
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
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тАО08-01-2010 12:44 AM
тАО08-01-2010 12:44 AM
Re: 2 Standalone Servers and HA
check the HP VSA.
mikap
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тАО08-01-2010 01:15 AM
тАО08-01-2010 01:15 AM
Re: 2 Standalone Servers and HA
you could have the data stored on some NFS server or ISCSI server.
mikap
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тАО08-01-2010 02:46 AM
тАО08-01-2010 02:46 AM
Re: 2 Standalone Servers and HA
But will NFS or iSCSI provide that kind of high availability that VM cluster can give.
Automated failover?
Rgds,
Richard
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тАО08-01-2010 11:18 PM
тАО08-01-2010 11:18 PM
Re: 2 Standalone Servers and HA
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
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тАО08-04-2010 12:02 AM
тАО08-04-2010 12:02 AM
Re: 2 Standalone Servers and HA
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
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тАО08-04-2010 03:18 AM
тАО08-04-2010 03:18 AM
Re: 2 Standalone Servers and HA
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
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тАО08-04-2010 03:25 AM
тАО08-04-2010 03:25 AM
Re: 2 Standalone Servers and HA
iSCSI is a SAN protocol.
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тАО08-04-2010 04:06 AM
тАО08-04-2010 04:06 AM
Re: 2 Standalone Servers and HA
it is misunderstanding, I ment NFS is not very suitable for production env... ;)
I do not have problem with FC or iSCSI SAN... :)
Jan
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тАО08-04-2010 12:40 PM
тАО08-04-2010 12:40 PM