Hi, Probably, a really late reply but here you go: This small python script(gf_dm_hash.py) should get hash of filename: http://joejulian.name/blog/dht-misses-are-expensive/ Regards, -Prashanth Pai ----- Original Message ----- From: "david zhang700" <david.zhang700@xxxxxxxxx> To: "Ben Turner" <bturner@xxxxxxxxxx> Cc: gluster-users@xxxxxxxxxxx Sent: Friday, July 25, 2014 8:56:41 AM Subject: Re: how to get hash range of a brick? 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 > > _______________________________________________ > Gluster-users mailing list > Gluster-users@xxxxxxxxxxx > http://supercolony.gluster.org/mailman/listinfo/gluster-users _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://supercolony.gluster.org/mailman/listinfo/gluster-users _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://supercolony.gluster.org/mailman/listinfo/gluster-users
