I recall a good bit of discussion about this a while back... There is a part of
the wiki devoted to this topic:
http://www.gluster.org/docs/index.php/Setting_up_AFR_on_two_servers_with_pre-existing_data
Also I wrote a 'set-attrs' script for setting glusterfs attributes on existing
data, essentially "converting" it to gluster format. Included below... It will
ignore anything that already has glusterfs attributes, and will set them on
anything that doesn't.
#!/bin/bash
DIR=$1
if [ -z $DIR ]
then
echo
echo "Error - no path was given."
echo
echo "USAGE: set-attrs /path/to/check"
echo
echo "Run set-attrs to check all files and directories in the"
echo "given path for glusterfs attributes. Any files without"
echo "a glusterfs version will be given a version attr of 2"
echo "and a createtime attr equal to the files last modified time."
echo
echo "Output information is logged to syslog (usually /var/log/messages)"
echo
exit 0
fi
set_attrs() {
get_ver="getfattr --absolute-names -n trusted.glusterfs.version"
set_ver="setfattr -n trusted.glusterfs.version"
set_ct="setfattr -n trusted.glusterfs.createtime"
if test "`$get_ver $i 2>/dev/null | fgrep -c trusted.glusterfs.version=`" = "0"
then
mods=$((mods+1))
# comment out next line to turn off logging
initlog -n set-attrs -s "Setting attrs on $i"
CT=`stat -c %Y $i`
$set_ct -v $CT $i
$set_ver -v 2 $i
fi
}
mods=0
checks=0
initlog -n set-attrs -s "Starting a set-attrs run on path: $DIR"
for i in `find $DIR -print`
do
set_attrs $i
checks=$((checks+1))
done
initlog -n set-attrs -s "Completed. $checks checks and $mods mods in this run"
exit 0
----- Original Message -----
From: "Stas Oskin" <[email protected]>
To: [email protected]
Sent: Wednesday, February 4, 2009 6:39:34 PM GMT -05:00 US/Canada Eastern
Subject: [Gluster-users] Transforming server with existing data into a
GlusterFS node
Hi.
I wonder, is it possible to transform a server with existing data into
GlusterFS node?
Meaning, define a volume then gradually move all the files into it?
Or it's much better to start a new one from scratch?
Regards.
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