Yes it can. That's called "cloning". It's even possible to have one instance deliver redo logs to the other one, who is in constant recovery mode, applying the redo logs it received from the first one. If the first instance fails, the other one is taken out of recovery mode and started up right away. It's called "standby database". You don't need any additional hardware, just the network connection between the twho hosts of the same type (one machine must apply redo logs from another one). There is also a third option, the most expensive one, but with the greates survivability, when two machines are accessing a shared array of disks. That will require special adapters, a private network connection between the two nodes and the software synchronizing access to the shared disk array. That opion is called RAC and the cost starts with $10,000. Fourth option, in which you would lose a few minutes of data is replication software called Data Guard. Essentially, you replicate one database to another in dicrete intervals. The technology is based on LogMiner. Now all that is left to you is to chose the option appropriate for your business need and negotiate the price with the Oracle Corp. sales person. Piece of cake.
-- Mladen Gogala Oracle DBA -----Original Message----- CHEN,JIN Sent: Thursday, August 28, 2003 6:34 PM To: Multiple recipients of list ORACLE-L Hi Greetings, I have such a plan but not sure if it is feasible. Please help! I install oracle server on two different machine (say A and B). In general, we run on one instance on server A. If we met any problem on server A, we copy all data files, control files and redo files plus spfile<SID>.ora to server B. Can server B startup that instance? Is there any restriction on this plan? or it is totally impossible? Would you please advise why? Thanks alot! Jin btw, they both are Solaris. -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: CHEN,JIN INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Note: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Wang Trading LLC and any of its subsidiaries each reserve the right to monitor all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be the views of any such entity. -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Mladen Gogala INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
