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rocksdb

2.6.0
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RocksDB for Erlang

Retired package: Release invalid - Use 2.6.1 instead
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rocksdb test flush_wal.erl
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test/flush_wal.erl 

%% Copyright (c) 2016-2026 Benoit Chesneau.

%%

%% This file is provided to you under the Apache License,

%% Version 2.0 (the "License"); you may not use this file

%% except in compliance with the License.  You may obtain

%% a copy of the License at

%%

%%   http://www.apache.org/licenses/LICENSE-2.0

%%

%% Unless required by applicable law or agreed to in writing,

%% software distributed under the License is distributed on an

%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

%% KIND, either express or implied.  See the License for the

%% specific language governing permissions and limitations

%% under the License.



-module(flush_wal).



-include_lib("eunit/include/eunit.hrl").



-define(rm_rf(Dir), rocksdb_test_util:rm_rf(Dir)).



%% Test flush_wal with default options

flush_wal_default_test() ->

  ?rm_rf("erocksdb.flush_wal_default.test"),

  {ok, Ref} = rocksdb:open("erocksdb.flush_wal_default.test", [{create_if_missing, true}]),



  %% Write some data

  ok = rocksdb:put(Ref, <<"key1">>, <<"value1">>, []),

  ok = rocksdb:put(Ref, <<"key2">>, <<"value2">>, []),



  %% Flush WAL with default options

  ok = rocksdb:flush_wal(Ref, []),



  %% Verify data is still readable

  {ok, <<"value1">>} = rocksdb:get(Ref, <<"key1">>, []),

  {ok, <<"value2">>} = rocksdb:get(Ref, <<"key2">>, []),



  ok = rocksdb:close(Ref),

  rocksdb:destroy("erocksdb.flush_wal_default.test", []),

  ?rm_rf("erocksdb.flush_wal_default.test"),

  ok.



%% Test flush_wal with sync=true

flush_wal_sync_test() ->

  ?rm_rf("erocksdb.flush_wal_sync.test"),

  {ok, Ref} = rocksdb:open("erocksdb.flush_wal_sync.test", [{create_if_missing, true}]),



  %% Write some data

  ok = rocksdb:put(Ref, <<"key1">>, <<"value1">>, []),

  ok = rocksdb:put(Ref, <<"key2">>, <<"value2">>, []),



  %% Flush WAL with sync=true (also calls SyncWAL afterwards)

  ok = rocksdb:flush_wal(Ref, [{sync, true}]),



  %% Verify data is still readable

  {ok, <<"value1">>} = rocksdb:get(Ref, <<"key1">>, []),

  {ok, <<"value2">>} = rocksdb:get(Ref, <<"key2">>, []),



  ok = rocksdb:close(Ref),

  rocksdb:destroy("erocksdb.flush_wal_sync.test", []),

  ?rm_rf("erocksdb.flush_wal_sync.test"),

  ok.



%% Test flush_wal with rate_limiter_priority

flush_wal_rate_limiter_priority_test() ->

  ?rm_rf("erocksdb.flush_wal_priority.test"),

  {ok, Ref} = rocksdb:open("erocksdb.flush_wal_priority.test", [{create_if_missing, true}]),



  %% Write some data

  ok = rocksdb:put(Ref, <<"key1">>, <<"value1">>, []),



  %% Flush WAL with different rate limiter priorities

  ok = rocksdb:flush_wal(Ref, [{rate_limiter_priority, io_low}]),

  ok = rocksdb:put(Ref, <<"key2">>, <<"value2">>, []),

  ok = rocksdb:flush_wal(Ref, [{rate_limiter_priority, io_high}]),

  ok = rocksdb:put(Ref, <<"key3">>, <<"value3">>, []),

  ok = rocksdb:flush_wal(Ref, [{rate_limiter_priority, io_total}]),



  %% Verify data is still readable

  {ok, <<"value1">>} = rocksdb:get(Ref, <<"key1">>, []),

  {ok, <<"value2">>} = rocksdb:get(Ref, <<"key2">>, []),

  {ok, <<"value3">>} = rocksdb:get(Ref, <<"key3">>, []),



  ok = rocksdb:close(Ref),

  rocksdb:destroy("erocksdb.flush_wal_priority.test", []),

  ?rm_rf("erocksdb.flush_wal_priority.test"),

  ok.



%% Test flush_wal with combined options

flush_wal_combined_test() ->

  ?rm_rf("erocksdb.flush_wal_combined.test"),

  {ok, Ref} = rocksdb:open("erocksdb.flush_wal_combined.test", [{create_if_missing, true}]),



  %% Write some data

  [ok = rocksdb:put(Ref, <<"key", (integer_to_binary(I))/binary>>,

                    <<"value", (integer_to_binary(I))/binary>>, [])

   || I <- lists:seq(1, 100)],



  %% Flush WAL with combined options

  ok = rocksdb:flush_wal(Ref, [{sync, true}, {rate_limiter_priority, io_mid}]),



  %% Verify data is still readable

  {ok, <<"value1">>} = rocksdb:get(Ref, <<"key1">>, []),

  {ok, <<"value100">>} = rocksdb:get(Ref, <<"key100">>, []),



  ok = rocksdb:close(Ref),

  rocksdb:destroy("erocksdb.flush_wal_combined.test", []),

  ?rm_rf("erocksdb.flush_wal_combined.test"),

  ok.