thank you. so how can I know Davies Meyer hash value of a file? is that the
value of trusted.gfid?
-----原始邮件-----
From: Ben Turner
Sent: Friday, July 25, 2014 4:51 AM
To: david zhang700
Cc: gluster-users@xxxxxxxxxxx
Subject: Re: how to get hash range of a brick?
----- Original Message -----
From: "david zhang700" <david.zhang700@xxxxxxxxx>
To: gluster-users@xxxxxxxxxxx
Sent: Thursday, July 24, 2014 11:39:34 AM
Subject: how to get hash range of a brick?
hi,who can tell me how to get hash range of a brick? thank you!
David
The command:
getfattr -n trusted.glusterfs.dht -e hex $brick
Will tell ya. Run that on each brick. IDK if this is useful but I keep a
map of hash ranges when I do testing so I know where a file _should_ be:
gluster volume info $volname | egrep '^Brick[0-9]+' |sed 's/: /=/' >
/dev/shm/${volname}_brickinfo
sed -i "s/^Brick/${volname}_Brick/g" /dev/shm/${volname}_brickinfo
# Build hash range for bricks
echo "Starting volume to populate xattrs"
gluster v start $volname --mode=script
sleep 5
echo "Stopping volume"
gluster v stop $volname --mode=script
touch /dev/shm/${volname}_hashrange
for line in $(/bin/cat /dev/shm/${volname}_brickinfo); do
host=$(/bin/echo $line | /bin/cut -d '=' -f 2 | /bin/cut -d ':' -f
1)
brick=$(/bin/echo $line | /bin/cut -d '=' -f 2 | /bin/cut -d ':' -f
2)
range=$(ssh -i /root/.ssh/my_key $host "getfattr -n
trusted.glusterfs.dht -e hex $brick")
hash_range=$(/bin/echo $range | /bin/cut -d '=' -f 2 | /bin/sed
's/0x0000000100000000//g')
end_range=${hash_range:8}
begin_range=$(/bin/echo $hash_range | /bin/sed "s/$end_range//g")
echo "${line}:${begin_range}:${end_range}" >>
/dev/shm/${volname}_hashrange
done
-b
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