1 symbolic link to 2 different places?


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users 1 symbolic link to 2 different places?
# 1  
Old 08-27-2003
1 symbolic link to 2 different places?

I was wondering is it possible todo something like following:
A) Settings:-
- 2 servers on the network
- both can be reached via /net/SERVER1/datadir and /net/SERVER2/datadir
- i'm running rsync to syncronize the data coming to server1 from whatever application

B) Wanted:
on other workstations say workstation1 i have /share which is a symlink to /net/SERVER1/datadir whats wanted that if i want to 'cd /net/SERVER1/datadir' and incase SERVER1 is down it automaticly jump to SERVER2

C) How:
i was thinking about timeouts if it hangs for 1 - 3 seconds it automaticly jums to SERVER2 or with if statement that does something like
ls /net/SERVER1/datadir > /dev/null
RETURN=$?
if [ $RETURN = 0 ]
then
cd /net/SERVER1/datadir
else
cd /net/SERVER2/datadir
fi


or if there is easier way todo it.


Thanks in advance.
# 2  
Old 08-27-2003
May be you can use additional IP adresses

Hi,

may be a little bit more work to do, but may be better is to you an additional IP Adress and DNS entry. For Server1 and/or Server2.

On Client side, you had never to change some thing. You only need one script on an third PC which is monitoring both servers, and when one server goes down, you will assign this special IP Adress with rsh or whatever on the other up and running system.

With this way, you can also implement a bigger high avaiblity environment.

Here the example:

Server1
eth0 : 192.168.0.1

Server2
eth0: 192.168.0.2

Normaly, Server1 is the main server for your filesystem, so you have an additonal IP Adress on it eth0:0 192.168.0.100 with the DNS name server.

All links are configured to server and not to server1 or server2.

IF the monitoring script detects the server1 is down or not avaible for what reason ever, it connects server2 with rsh or whatever and activated on server2 eth0:0 with the IP adress 192.168.0.100 and DNS name server.
with this way, for the clients nothing will change and everything goes well.

Regards
Alex
# 3  
Old 08-27-2003
yeah i know htats good idea some sort of clustering, but what i wanted is i dont have to change IPs or anything like that
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Red Hat

How to remove symbolic link?

this is my current code, # ln -s /lib64/ # ls -lrth total 80K -rw-r--r--. 1 root root 12K Jul 6 2012 post-install -rw-r--r--. 1 root root 552 Jul 6 2012 post-install.log -rw-------. 1 root root 1.5K Aug 21 2012 anaconda-ks.cfg drwxr-xr-x. 2 root root 4.0K Aug 21 2012 Videos... (3 Replies)
Discussion started by: jediwannabe
3 Replies

2. UNIX for Dummies Questions & Answers

Symbolic link

Hi, trying to understand more about symblic link, when I compiled a program called "match" in one folder ~/downloadsoftware/I want this program to be accessible like a system command by putting a symbolic link in /usr/bin/ Not by setting the $PATH method in .bashrc at this time. What I did is:... (4 Replies)
Discussion started by: yifangt
4 Replies

3. UNIX for Dummies Questions & Answers

[Solved] Symbolic link not allowed or link target not accessible

Hi everybody, I read about treads realted to this issue but they did not resovle issue given below. Please help me resolve issue given below I have html file under /srv/www/htdocs/actual_folder ls actual_folder/ test.html and following link works... (0 Replies)
Discussion started by: newbielgn
0 Replies

4. Shell Programming and Scripting

ls on a symbolic link

Hi all, Can anyone please confirm if the command below is the only way that I can get what the symbolic link is set to? mnlxd110(oracle)/db/posd2/dba$: ls -l | grep "^l" lrwxrwxrwx 1 oracle dba 28 Aug 9 2011 bdump -> diag/rdbms/posp1/posp1/trace mnlxd110(oracle)/db/posd2/dba$:... (7 Replies)
Discussion started by: newbie_01
7 Replies

5. Shell Programming and Scripting

Symbolic Link Help

Hello All, This may be a silly question to some but I am really stuck. Is there a way to reverse the following; sudo rm /bin/sh sudo ln -s /bin/bash /bin/sh It was part of a driver compile/installation procedure by Digi for Ubuntu stating that dash isn't supported and a symbolic link... (2 Replies)
Discussion started by: LAVco
2 Replies

6. Shell Programming and Scripting

symbolic link

Hi, i am trying to create sym links on sles 11 , but it seems i am doing something wrong. oracle@tests:/u01/app/oracle/oradata/ACIS> pwd /u01/app/oracle/oradata/ACIS oracle@tests:/u01/app/oracle/oradata/ACIS> ln -s /db/ACIS/dbase/dbf/ /u01/app/oracle/oradata/ACIS/... (2 Replies)
Discussion started by: tonijel
2 Replies

7. UNIX for Dummies Questions & Answers

need some info about symbolic link and hard link

hello folks how y'all doin well i have some questions about symbolic link and hard link hope some one answer me i open terminal and join as root and i wrote ln -s blah blah then i wrote ls i see red file called blah blah but didn't understand what is this can some one explain and... (2 Replies)
Discussion started by: detective linux
2 Replies

8. UNIX for Dummies Questions & Answers

Symbolic Link Confusion

I have just tried to make my first shortcut aka symbolic link. I entered this command: ln -s /one/two/three/four/help/admin admindirectory to make a link called 'admindirectory' that would take me to: /one/two/three/four/help/admin It seems to have created a directory called... (5 Replies)
Discussion started by: Sepia
5 Replies

9. Shell Programming and Scripting

Creating symbolic link

Any idea how to create a symbolic link...for example i want to create a symbolink link for a specific user in his profile to use the df command...? Thanks in advance (9 Replies)
Discussion started by: charbel
9 Replies

10. UNIX for Dummies Questions & Answers

symbolic Link

question abt symbolic link ... i'm doing the following ... ln -s x.sh ./scripts/y.sh and cat ./scripts/y.sh it is giving following error cat: cannot open y.sh Any reason u an think of ? But it is working fine when i goto scripts directory and cretae the symbolic link. ... (1 Reply)
Discussion started by: bhargav
1 Replies
Login or Register to Ask a Question

Featured Tech Videos