Hello list,
Apologies in advance for the longish preamble - the question (when I get to
it) is fairly straight forward.
We’ve been happily running Riak for a couple of years now using
multi-backend to map various buckets onto different disk locations (for
infosec compliance reasons).
Our config is essentially this:
{riak_kv, [
{storage_backend, riak_kv_multi_backend},
%% Configure multiple eleveldb storage locations
{multi_backend_default, <<"default">>},
{multi_backend, [
%% Default fallback: this is unused
{<<"default">>, riak_kv_eleveldb_backend, [
{data_root, "/mnt/riak/eleveldb/default"}
]},
%% Storage1
{<<"eleveldb_storage1">>, riak_kv_eleveldb_backend, [
{data_root, "/mnt/riak/eleveldb/storage1"}
]},
%% Storage2
{<<"eleveldb_storage2">>, riak_kv_eleveldb_backend, [
{data_root, "/mnt/riak/eleveldb/storage2"}
]},
...
Bucket properties then map Riak buckets onto the relevant backend.
Again for infosec compliance reasons, we need to “retire” one of our
backends, and the data contained therein.
What would a process be for doing this? What happens across the cluster as
I remove the config from each node? At what point can I safely delete the
data directories?
Thanks
Matt
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