On our riak cluster machines, we have a separate disk which stores all the
bitcask data (in /data)
This is so that we can have a (relatively) small disk for the OS, and have
a big disk for /data.
$ df -h / /data
Filesystem Size Used Avail Use% Mounted on
/dev/root 20G 11G 7.9G 57% /
/dev/md3 3.6T 277G 3.1T 9% /data
However, especially more so lately, we see that the /var/lib/riak directory
often becomes very large.
$ pwd
/var/lib/riak
$ du -hcs *
9.3G anti_entropy
1.1M kv_vnode
104K ring
9.3G total
So we see that the anti_entropy directory takes up 9.3GB (almost half of /).
(Sometimes it balloons to 18GB, almost taking up the disk. We then restart
riak to get the disk usage down.)
I want to move that directory off /.
Here are the steps I want to perform on each node.
1. Stop riak
2. Move /data to /riak/data (I will have to change the name of the mount
point)
3. Move /var/lib/riak/anti_entropy to /riak/anti_entropy
4. Change the following items in app.config
- Change {anti_entropy_data_dir, "/var/lib/riak/anti_entropy"},
to {anti_entropy_data_dir,
"/riak/anti_entropy"},
- Change {data_root, "/data"} to {data_root, "/riak/data"}
5. Start riak
I just wanted to confirm that if I move the files and change the config,
riak will simply start up and continue as before.
Thanks!
Sujay
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