[sclug] Writing files to 2 places at once?

[David Given]

On Friday 03 March 2006 15:57, Sapan Ganguly wrote:
[...]
> I've been thinking along thsese lines, all the filesystems involved are
> journalling (ext3), I've also been reading about FAM (File Access Monitor)
> and IMON (Inode Monitor).  I may be barking up the wrong tree but what do
> you all think?  Should I be able to use both or one of these tools to let
> Oracle write to its datafiles in the current location and to my new
> location at the same time?

I don't know, but Ye Olde Unixe way of doing these things is to use tee and 
tail.

tee writes stdin to a file and also to stdout:

    echo 'Hello, world!' | tee file1 | tee file2 | tee file3 > file4

tail -F will watch a file for changes and show them to you:

    tail -F logfile

You can combine the two to replicate logs.

    tail -F /mnt/oracle/logfile | tee /mnt/anotherdisk/logfile > /dev/tty11

(You don't need to use tee in this case, but I like my logs on virtual 
terminals.)

tail -F watches a particular filename. If the file there changes, it'll reopen 
it. The more familiar tail -f watches a particular file. If Oracle does log 
rotation, tail -f won't work.

Any use to you?

-- 
+- David Given --McQ-+ "In America, family has become a code word for
|  dg at cowlark.com    | something that you can put a five-year-old in front
| (dg at tao-group.com) | of and come back secure in the knowledge that your
+- www.cowlark.com --+ child not will not have been exposed to any ideas."
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