Home » Server Options » RAC & Failsafe » LUNS allocation to RAC (Oracle 11g R1, SUSE 11 64bit)
LUNS allocation to RAC [message #536009] Sun, 18 December 2011 23:43 Go to next message
twalaa
Messages: 3
Registered: May 2007
Location: Pretoria
Junior Member
Good Day.

We are planning the RAC installations. We are allocate 3TB on HP SAN Storage to be used to setup rac environment with 2 nodes.


Question.

1. Do we accept one 3 TB from SAN engineers or ( Which RAID)

2. Multiple Luns totality to 3 TB.

3. Remember this is 11g R1 OCR and VOTING DISK cannot be managed by ASM.



Regards
AT
Re: LUNS allocation to RAC [message #536070 is a reply to message #536009] Mon, 19 December 2011 02:56 Go to previous messageGo to next message
John Watson
Messages: 8738
Registered: January 2010
Location: Global Village
Senior Member
Are you intending to use ASM or a clustered file system for the database storage?

(btw, I see you are in Pretoria: Orafaq has very strong connections with ZA.)
Re: LUNS allocation to RAC [message #536267 is a reply to message #536070] Tue, 20 December 2011 01:50 Go to previous messageGo to next message
twalaa
Messages: 3
Registered: May 2007
Location: Pretoria
Junior Member
We intending to use ASM for Database files. Another question is the VIP address, we are given IP Address(Eth02)for public address and EthO3 for private. How do we step for VIP? do we request another sets of IP addresses
Re: LUNS allocation to RAC [message #536273 is a reply to message #536267] Tue, 20 December 2011 02:12 Go to previous message
John Watson
Messages: 8738
Registered: January 2010
Location: Global Village
Senior Member
There are some things you must get right with ASM at the beginning. This is a partial list.

1. RAID. Oracle has changed it's advice. Until recently, they said "if your hardware can do RAID, use it". Now they say "use JBOD". There are valid resons to go either way.
2. Give ASM at least 8 LUNs for each disc group.
3. Use allocation unit size of 4M
4. Your tablespaces must be uniform extent size to match the AU size.

That's the beginning. If you want consulting support, please PM me. We do a lot of work in South Africa.

VIPs are a whole different matter, you'll need to open another topic for that.
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