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Conference decwet::winnt-clusters

Title:	WinNT-Clusters
Notice:	Info directories moved to DECWET::SHARE1$:[NT_CLSTR]
Moderator:	DECWET::CAPPELLOF

Created:	Thu Oct 19 1995
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	863
Total number of notes:	3478

767.0. "[Wolfpack] Generic Wolfpack Questions" by ALFAM7::SIEBOLD (Thomas, TSO Munich - ALPHAholics can not be VAXinated!) Thu Apr 24 1997 05:41

For a paper where a customer wants a comparison of cluster solution I am tasked
with writing something on DEc and Wolfpack Clusters.

Could someone please help me with the following questions or verify my answers:

1) Can a wolfpack server be a member in multiple clusters?
	[I assume NO]

2) Can there be multiple clusters in a domain?
	[I assume YES]

3) Can the member servers be PDC and BDC respectively or MUST they be?
	[ I assume the CAN, but MUST not]

4) Are there more than one SCSI rail supported ?
	[ I assume YES]

5) FWD SCSI is the only one supported ?

6) What is the failover granularity, bus or disk ?
	[I assume disk]

7) SQL Server: Wolfpack is supposed to support single SQL server only.
	Is this correct? If so, how is failover done?

thanks
	Thomas

T.R	Title	User	Personal Name	Date	Lines
767.1		SUTRA::16.36.2.155::Bats	Speeding, speeding, I'm always speeding	`Thu Apr 24 1997 09:34`	33
	1) Can a wolfpack server be a member in multiple clusters? [I assume NO] >> Correct 2) Can there be multiple clusters in a domain? [I assume YES] >> Correct 3) Can the member servers be PDC and BDC respectively or MUST they be? [ I assume the CAN, but MUST not] >> Correct 4) Are there more than one SCSI rail supported ? [ I assume YES] >> Correct 5) FWD SCSI is the only one supported ? >> By Digital yes. It's up to other vendors if they want to implement >> Single-Ended SCSI. It would be vendor dependent. 6) What is the failover granularity, bus or disk ? [I assume disk] >> Disk 7) SQL Server: Wolfpack is supposed to support single SQL server only. Is this correct? If so, how is failover done? >>Basically you install SQLServer twice to the same physical location >>(Shared disk of course), and you start/stop the MSSQLSERVER server. >>The other associated entries in a group like the IP-address used, the >> NetBIOS name used and the disk are taking with the SQLServer. >> When a failover happens, you'll get the Wolfpack software that stops >> the MSSQLSERVER on one machine (provided that it was manual) and starts >> it on the other machine. MSSQLSERVER will read the MASTER.DAT file etc >> and will hapily have everything on-line afterwards. >> Since you take the IP-address and a NetBIOSname with it as well, clients >> can still connect to the same socket or namedpipe. >>Pjotrr
767.2	dual Wolfpack SQL from Digital	DECWET::CAPPELLOF	My other brain is a polymer	`Thu Apr 24 1997 16:29`	17
	>7) SQL Server: Wolfpack is supposed to support single SQL server only. > Is this correct? If so, how is failover done? The explanation in .1 is correct for plain SQL Server. The Digital Wolfpack Plus add-on will allow you to run SQL Server on both nodes with failover, just like Digital Clusters does today. >5) FWD SCSI is the only one supported ? >>> By Digital yes. It's up to other vendors if they want to implement >>> Single-Ended SCSI. It would be vendor dependent. That's true for the initial systems that Digital is certifying for Wolfpack compatibility. I think you'll see more storage connection options soon. Ultra-SCSI is going to be released soon, and we're going to be looking at Fibre Channel as soon as possible. It's only a matter of certification. Wolfpack should work with all of them.