| RAC issue [message #531825] |
Thu, 17 November 2011 19:51  |
andy huang
Messages: 498
Registered: July 2011
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Senior Member |
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Dear all,
If two nodes access the same data block at the same time, how RAC to deal with it?
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| Re: RAC issue [message #531856 is a reply to message #531825] |
Fri, 18 November 2011 01:47  |
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Michel Cadot
Messages: 68716
Registered: March 2007
Location: Saint-Maur, France, https...
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Senior Member
Account Moderator |
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It is quite complex, it depends on access mode each node requests the block (read or write, consistent or current).
In short, each block is associated to a master node, each requester node asks the master node in which state is the block and which node held it and depending on the case, the block is read from the datafile or gotten from the interconnect link (global cache).
Regards
Michel
[Updated on: Fri, 18 November 2011 03:59] Report message to a moderator |
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