Hi,
I have query related to Riak storage backend change for buckets.
In my setup I have defined different storage backends,
mainly differentiated based on r,w,dw values.
I created a bucket using HTTP api (it used default 'bitcask_mult'
backend).
%% Storage_backend specifies the Erlang module defining the
storage
%% mechanism that will be used on this node.
{storage_backend, riak_kv_multi_backend},
%% Adding multi backend storage related plugins
{multi_backend_default, <<"bitcask_mult">>},
{multi_backend, [
%% individual backends
{<<"bitcask_mult">>, riak_kv_bitcask_backend, [
%% bitcask configuration
{data_root, "./data/bitcask"},
{open_timeout, 4},
{sync_strategy, {seconds, 60}},
{max_file_size, 16#80000000},
{merge_window, {6, 7}},
{frag_merge_trigger, 60},
{dead_bytes_merge_trigger, 536870912},
{max_fold_age, -1},
{max_fold_puts, 0},
{expiry_secs, 86400}
]},
{<<"bitcask_mult_l">>, riak_kv_bitcask_backend, [
%% bitcask configuration
{data_root, "./data/bitcask_l"},
{open_timeout, 4},
{n_val,3},
{r,1},
{w,1},
{dw,1},
{allow_mult,true},
{last_write_wins,false},
{sync_strategy, {seconds, 10}},
{max_file_size, 16#80000000},
{merge_window, {6, 7}},
{frag_merge_trigger, 60},
{dead_bytes_merge_trigger, 536870912},
{max_fold_age, -1},
{max_fold_puts, 0},
{expiry_secs, 86400}
]},
So when I get bucket it shows all the default properties such as
"r":"quorum", "w":"quorum", etc ..
I changed the storage backend for the bucket to 'bitcask_mult_l' which
has different values for r:1,w:1,dw:1, etc.
After changing the backend I restarted node (all the nodes on cluster).
However, I am still getting the old quorum values ...
so my queries are:
1. Is there something missing in configuration?
2. Do I have to specifically update (bucket properties with) all the
quorum and other properties of new storage backend
(manually/programatically) ?
3. What is the proper way of configuring multiple buckets with
respective storage backends?
Any help or pointer is highly appreciated.
Command used to change bucket backend:
> curl -X PUT -H "Content-Type: application/json" \
> -d '{"props":{"backend":"bitcask_mult_l"}}' \
> http://localhost:8098/riak/test
Result show old/stale quorum related properties:
> curl http://192.168.21.201:8098/riak/test
{"props":{"allow_mult":false,"backend":"bitcask_mult_l"
,"basic_quorum":false,"big_vclock":50,"chash_keyfun":{"mod":"riak_core_util","fun":"chash_std_keyfun"},
"dw":"quorum"
,"last_write_wins":false,"linkfun":{"mod":"riak_kv_wm_link_walker","fun":"mapreduce_linkfun"},"n_val":3,"name":"test","notfound_ok":true,"old_vclock":86400,"postcommit":[],"pr":0,"precommit":[],"pw":0,
"r":"quorum","rw":"quorum","search":false,"small_vclock":50,"w":"quorum"
,"young_vclock":20}}
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