RE: compelling arguments for a ThirdParty Cluster
- From: "Oliver Jost" <Oliver.Jost@xxxxxxxxxxxxxx>
- To: "Oracle-L" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 17 Jan 2008 15:01:11 -0500
Yes, with proper installation and hardware configuration all of the
issues you've listed are not really that big. Check out the Oracle docs
on OTN for specifics (e.g. Solaris offers IPMP on the interconnect to
accommodate failover). There are mechanisms in place for data to be
protected in the event of node failure.
Oliver
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of LS Cheng
Sent: Thursday, January 17, 2008 6:47 AM
To: hrishys@xxxxxxxxxxx
Cc: raindoctor@xxxxxxxxx; Oracle-L
Subject: Re: compelling arguments for a ThirdParty Cluster
simple words
if Oracle Clusterware fencing is not reliable we would have seen already
data corruptions issues
plus, RAC internally has algorithm to avoid data corruptions when cache
fusion communications suffers problems
interconnect is not SPOF if you protect it with bonding or teaming
I am not sure what is your point about LUNs but I have been in many
sites and asking for 5 1GB LUNs does not seem problem at all
Thanks
--
LSC
On Jan 17, 2008 3:14 PM, hrishy <hrishys@xxxxxxxxxxx> wrote:
Hi
I am looking it from a prespective off SLA's
for ex the document mentions
a)Establishing dependencies between clusterware
storage and RAC databases to ensure that the shutdown
in the correct sequence.The sun clusterware allows the
oracle clusterware to be stopped before the
filesystems are stopped.
b)It also suggests that there is a scope for oracle
clusterware to evict a node and yet not reboot it
immedaitely .The remaning nodes start recovering the
transactions however the evicted continues to write to
the datafiles during the period of eviction to the
point where it falls down to the boot prompt it will
lead to corruption
There are some other points
Like
a)interconnect connect being single point of failure
b)How to provision voting disks and OCR should i ask
the storage admins to carve out 5 1GB LUNS so i can
mirror them ?
c)Would the storage admin object if i ask 5 1GB luns
to be carved out for me as mostly they allocate LUNS
of 64 GB 100Gb etc
regards
Hrishy
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