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- Path: sparky!uunet!uswnvg!nv6.uswnvg.com!cjackso
- From: cjackso@uswnvg.com (Clay Jackson)
- Newsgroups: comp.databases.oracle
- Subject: Re: SQL*NET: a server serves multiple ORACLE_HOME/ORACLE_SID?
- Message-ID: <3119@uswnvg.uswnvg.com>
- Date: 25 Jan 93 22:11:00 GMT
- References: <jan.727921229@wombaj.kowari.cpsg.com.au>
- Sender: news@uswnvg.uswnvg.com
- Organization: U S WEST NewVector Group, Inc.
- Lines: 56
- X-Newsreader: Tin 1.1 PL5
-
- Jian Cai (jan@kowari.cpsg.com.au) wrote:
- : Q: Does an ORACLE server serves requests from different ORACLE_HOME
- : and/or ORACLE_SID?
- : Assume on host A there are multiple sets of ORACLE_HOME/ORACLE_SID
- : and on host B there is one orasrv running. Will the server on B serves
- : clients on A? If not, how to get it work?
-
- Your example is a bit different from (what I infer is) your question. I'm not
- sure how to answer your example, but, if your question was:
- Server(Host) A has two Oracle instances running (but one orasrv)
- Client B wants to access one of those instances
- Then the answer is a qualified "yes". The ORACLE_SID from the client
- determines which SID/ORACLE_HOME gets used (orasrv looks in /etc/oratab
- (on Unix systems) to find the correct combination). We do this all the
- time. The caveat is that if you're gonna use only ONE orasrv, then
- BOTH Oracle instances MUST be running THE SAME VERSION of the RDBMS
- kernel, and must have been linked with the "correct" (ie the same)
- SQL*NET drivers. In such a case, there's really no point in having
- two separate ORACLE_HOMEs, since all of the executables have to be
- at the same rev anyway.
-
- If you want to get REALLY wierd, it is possible to run more than one
- version of the RDBMS (actually, it's not the kernel that gets you, it's
- the versions of the SQL*NET drivers that are linked with the kernel, but
- you should get the idea). Here's what you need to do (all of this
- assumes you're on a Unix box):
- 1) In /etc/services, you'll find a line that looks something like
- orasrv 1525/tcp tcp # oracle
- This specifies the PORT number that orasrv is going to use.
- Add another line with a new port number, ala:
- mysrv 1526/tcp tcp # new server
- You may also have to hack your tcp startup files to enable
- this port, and your (Unix) kernel to support it.
- 2) Start a the second listener, from the Unix command line, like
- so (note, this only works if you're using the TLI based
- server products - the command will probably be a bit
- different for socket based tcp):
- TLI_SERVER=mysrv; export TLI_SERVER
- tcptlictl start
- This will start a second listener, on the port you specified
- above.
- 3) To connect to the second listener, put the name of the server
- in the connect string, like so:
- connect scott/tiger@T:<hostname>,mysrv:<sid>
- If you're unsure about any of this, you may want to contact Oracle
- Support and/or your SysAdmins for further assistance. As always, your
- mileage may vary.
-
- Good luck!
-
-
- --
- Clay Jackson - N7QNM
- US WEST NewVector Group Inc
- Bellevue, WA
- cjackso@uswnvg.com
-