On 11 September 2015 at 11:45, Sujay Mansingh <[email protected]> wrote:
> 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.
>
>
Hi Sujay,
The steps you outlined are going to work fine. Please make sure that the
newly created '/riak' directory has the correct file permissions for the
'riak' user.
Regards,
Magnus
> Thanks!
>
> Sujay
>
>
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>
>
--
Magnus Kessler
Client Services Engineer @ Basho
Registered Office - 8 Lincoln’s Inn Fields London WC2A 3BP Reg 07970431
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