Merge pull request #292 from martinsumner/mas-i287-config

Make page cache level configurable

priv/leveled.schema

@@ -72,7 +72,7 @@
   {datatype, integer}
 ]}.
 
-%% @doc The approximate size (in bytes) when a Journal file should be rolled.
+%% @doc The approximate count of objects when a Journal file should be rolled.
 %% This time measured in object count, a file will be rolled if either the
 %% object count or the journal size limit is reached.  Default 200K.
 %% Note that on startup an actual maximum size will be chosen which varies by
@@ -83,6 +83,14 @@
   {datatype, integer}
 ]}.
 
+%% @doc The level of the ledger to be pre-loaded into the page cache
+%% Depending on how much memory is available for the page cache, and how much
+%% disk I/O activity can be tolerated at startup - then the level at which the
+%% ledger is forced into the page cache can be controlled by configuration.
+{mapping, "leveled.ledger_pagecachelevel", "leveled.ledger_pagecachelevel", [
+  {default, 4},
+  {datatype, integer}
+]}.
 
 %% @doc The number of journal compactions per vnode per day
 %% The higher the value, the more compaction runs, and the sooner space is 

priv/leveled_multi.schema

@@ -66,7 +66,7 @@
   {datatype, integer}
 ]}.
 
-%% @doc The approximate size (in bytes) when a Journal file should be rolled.
+%% @doc The approximate count of objects when a Journal file should be rolled.
 %% This time measured in object count, a file will be rolled if either the
 %% object count or the journal size limit is reached.  Default 200K.
 %% Note that on startup an actual maximum size will be chosen which varies by
@@ -77,6 +77,16 @@
   {datatype, integer}
 ]}.
 
+%% @doc The level of the ledger to be pre-loaded into the page cache
+%% Depending on how much memory is available for the page cache, and how much
+%% disk I/O activity can be tolerated at startup - then the level at which the
+%% ledger is forced into the page cache can be controlled by configuration.
+{mapping, "multi_backend.$name.leveled.ledger_pagecachelevel", "riak_kv.multi_backend", [
+  {default, 4},
+  {datatype, integer}
+]}.
+
+
 %% @doc The number of journal compactions per vnode per day
 %% The higher the value, the more compaction runs, and the sooner space is 
 %% recovered.  But each run has a cost

src/leveled.app.src

@@ -1,7 +1,7 @@
 {application, leveled,
  [
   {description, "Key Value store based on LSM-Tree and designed for larger values"},
-  {vsn, "0.9.17"},
+  {vsn, "0.9.18"},
   {registered, []},
   {applications, [
                   kernel,

src/leveled_bookie.erl

@@ -144,6 +144,7 @@
                 {maxrunlength_compactionpercentage, 70.0},
                 {reload_strategy, []},
                 {max_pencillercachesize, ?MAX_PCL_CACHE_SIZE},
+                {ledger_preloadpagecache_level, ?SST_PAGECACHELEVEL_LOOKUP},
                 {compression_method, ?COMPRESSION_METHOD},
                 {compression_point, ?COMPRESSION_POINT},
                 {log_level, ?LOG_LEVEL},
@@ -320,6 +321,10 @@
             % The minimum size 400 - attempt to set this vlaue lower will be 
             % ignored.  As a rule the value should be at least 4 x the Bookie's
             % cache size
+        {ledger_preloadpagecache_level, pos_integer()} |
+            % To which level of the ledger should the ledger contents be
+            % pre-loaded into the pagecache (using fadvise on creation and
+            % startup)
         {compression_method, native|lz4} |
             % Compression method and point allow Leveled to be switched from
             % using bif based compression (zlib) to using nif based compression
@@ -1184,12 +1189,14 @@ init([Opts]) ->
                     ok
             end,
 
+            PageCacheLevel = proplists:get_value(ledger_preloadpagecache_level, Opts),    
+
             {HeadOnly, HeadLookup, SSTPageCacheLevel} = 
                 case proplists:get_value(head_only, Opts) of 
                     false ->
-                        {false, true, ?SST_PAGECACHELEVEL_LOOKUP};
+                        {false, true, PageCacheLevel};
                     with_lookup ->
-                        {true, true, ?SST_PAGECACHELEVEL_LOOKUP};
+                        {true, true, PageCacheLevel};
                     no_lookup ->
                         {true, false, ?SST_PAGECACHELEVEL_NOLOOKUP}
                 end,

src/leveled_iclerk.erl

@@ -793,19 +793,19 @@ filter_output(KVCs, FilterFun, FilterServer, MaxSQN, ReloadStrategy) ->
 write_values([], _CDBopts, Journal0, ManSlice0, _PressMethod) ->
     {Journal0, ManSlice0};
 write_values(KVCList, CDBopts, Journal0, ManSlice0, PressMethod) ->
-    KVList = lists:map(fun({K, V, _C}) ->
+    KVList = 
+        lists:map(fun({K, V, _C}) ->
                             % Compress the value as part of compaction
                         {K, leveled_codec:maybe_compress(V, PressMethod)}
                     end,
                     KVCList),
-    {ok, Journal1} = case Journal0 of
+    {ok, Journal1} = 
+        case Journal0 of
             null ->
                 {TK, _TV} = lists:nth(1, KVList),
                 {SQN, _LK} = leveled_codec:from_journalkey(TK),
                 FP = CDBopts#cdb_options.file_path,
-                                FN = leveled_inker:filepath(FP,
-                                                            SQN,
-                                                            compact_journal),
+                FN = leveled_inker:filepath(FP, SQN, compact_journal),
                 leveled_log:log("IC009", [FN]),
                 leveled_cdb:cdb_open_writer(FN, CDBopts);
             _ ->

test/end_to_end/recovery_SUITE.erl

@@ -12,7 +12,8 @@
             aae_bustedjournal/1,
             journal_compaction_bustedjournal/1,
             close_duringcompaction/1,
-            allkeydelta_journal_multicompact/1
+            allkeydelta_journal_multicompact/1,
+            recompact_keydeltas/1
             ]).
 
 all() -> [
@@ -25,7 +26,8 @@ all() -> [
             aae_bustedjournal,
             journal_compaction_bustedjournal,
             close_duringcompaction,
-            allkeydelta_journal_multicompact
+            allkeydelta_journal_multicompact,
+            recompact_keydeltas
             ].
 
 
@@ -600,18 +602,19 @@ busted_journal_test(MaxJournalSize, PressMethod, PressPoint, Bust) ->
 
 
 allkeydelta_journal_multicompact(_Config) ->
-    % Simply confirms that none of this causes a crash
     RootPath = testutil:reset_filestructure(),
     B = <<"test_bucket">>,
     StartOptsFun = 
         fun(JOC) ->
             [{root_path, RootPath},
                 {max_journalobjectcount, JOC},
-                {max_run_length, 6},
+                {max_run_length, 4},
+                {singlefile_compactionpercentage, 70.0},
+                {maxrunlength_compactionpercentage, 85.0},
                 {sync_strategy, testutil:sync_strategy()}]
         end,
-    {ok, Bookie1} = leveled_bookie:book_start(StartOptsFun(16000)),
-    {KSpcL1, _V1} = testutil:put_indexed_objects(Bookie1, B, 40000),
+    {ok, Bookie1} = leveled_bookie:book_start(StartOptsFun(14000)),
+    {KSpcL1, _V1} = testutil:put_indexed_objects(Bookie1, B, 24000),
     {KSpcL2, V2} = testutil:put_altered_indexed_objects(Bookie1,
                                                         B,
                                                         KSpcL1,
@@ -637,7 +640,7 @@ allkeydelta_journal_multicompact(_Config) ->
     ok = leveled_bookie:book_close(Bookie1),
     leveled_penciller:clean_testdir(RootPath ++ "/ledger"),
     io:format("Restart without ledger~n"),
-    {ok, Bookie2} = leveled_bookie:book_start(StartOptsFun(24000)),
+    {ok, Bookie2} = leveled_bookie:book_start(StartOptsFun(13000)),
 
     ok = testutil:check_indexed_objects(Bookie2,
                                         B,
@@ -657,7 +660,7 @@ allkeydelta_journal_multicompact(_Config) ->
     ok = leveled_bookie:book_close(Bookie2),
 
     io:format("Restart with smaller journal object count~n"),
-    {ok, Bookie3} = leveled_bookie:book_start(StartOptsFun(8000)),
+    {ok, Bookie3} = leveled_bookie:book_start(StartOptsFun(7000)),
 
     {KSpcL4, V4} = testutil:put_altered_indexed_objects(Bookie3,
                                                         B,
@@ -674,11 +677,45 @@ allkeydelta_journal_multicompact(_Config) ->
         file:list_dir(
             filename:join(RootPath, "journal/journal_files/post_compact")),
     io:format("Number of files after compaction ~w~n", [length(FileList4)]),
-    true = length(FileList4) >= length(FileList3) + 4,
+    true = length(FileList4) >= length(FileList3) + 3,
 
     ok = leveled_bookie:book_close(Bookie3),
     testutil:reset_filestructure(10000).
 
+recompact_keydeltas(_Config) ->
+    RootPath = testutil:reset_filestructure(),
+    B = <<"test_bucket">>,
+    StartOptsFun = 
+        fun(JOC) ->
+            [{root_path, RootPath},
+                {max_journalobjectcount, JOC},
+                {max_run_length, 4},
+                {singlefile_compactionpercentage, 70.0},
+                {maxrunlength_compactionpercentage, 85.0},
+                {sync_strategy, testutil:sync_strategy()}]
+        end,
+    {ok, Bookie1} = leveled_bookie:book_start(StartOptsFun(45000)),
+    {KSpcL1, _V1} = testutil:put_indexed_objects(Bookie1, B, 24000),
+    {KSpcL2, _V2} = testutil:put_altered_indexed_objects(Bookie1,
+                                                        B,
+                                                        KSpcL1,
+                                                        false),
+    ok = leveled_bookie:book_close(Bookie1),
+    {ok, Bookie2} = leveled_bookie:book_start(StartOptsFun(45000)),                 
+    compact_and_wait(Bookie2, 0),
+    {KSpcL3, V3} = testutil:put_altered_indexed_objects(Bookie2,
+                                                        B,
+                                                        KSpcL2,
+                                                        false),
+    compact_and_wait(Bookie2, 0),
+    ok = testutil:check_indexed_objects(Bookie2,
+                                        B,
+                                        KSpcL1 ++ KSpcL2 ++ KSpcL3,
+                                        V3),
+    ok = leveled_bookie:book_close(Bookie2),
+    testutil:reset_filestructure(10000).
+
+
 
 rotating_object_check(BookOpts, B, NumberOfObjects) ->
     {ok, Book1} = leveled_bookie:book_start(BookOpts),