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Merge pull request #8 from jlouis/qc-sync-range

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Qc sync range
This commit is contained in:
Kresten Krab Thorup 2012-01-21 13:42:17 -08:00
commit 90ba15fca8
4 changed files with 134 additions and 49 deletions
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3
Makefile
View file

@ -17,6 +17,9 @@ clean:
eunit: compile clean-test-btrees
@$(REBAR) eunit skip_deps=true
eunit_console:
erl -pa .eunit deps/*/ebin
clean-test-btrees:
rm -fr .eunit/Btree_* .eunit/simple

4
src/lsm_btree.erl
View file

@ -23,7 +23,9 @@ close(Ref) ->
gen_server:call(Ref, close)
catch
exit:{noproc,_} -> ok;
exit:noproc -> ok
exit:noproc -> ok;
%% Handle the case where the monitor triggers
exit:{normal, _} -> ok
end.

22
test/lsm_btree_drv.erl
View file

@ -12,6 +12,7 @@
lookup_fail/2,
open/1, close/1,
put/3,
sync_range/3,
stop/0]).
%% gen_server callbacks
@ -49,6 +50,9 @@ close(N) ->
put(N, K, V) ->
call({put, N, K, V}).
sync_range(T, LK, HK) ->
call({sync_range, T, LK, HK}).
stop() ->
call(stop).
@ -72,6 +76,12 @@ handle_call({close, N}, _, #state { btrees = D} = State) ->
Otherwise ->
{reply, {error, Otherwise}, State}
end;
handle_call({sync_range, Name, LoKey, HiKey}, _From,
#state { btrees = D} = State) ->
Tree = dict:fetch(Name, D),
{ok, Ref} = lsm_btree:sync_range(Tree, LoKey, HiKey),
Result = sync_range_gather(Ref),
{reply, Result, State};
handle_call({put, N, K, V}, _, #state { btrees = D} = State) ->
Tree = dict:fetch(N, D),
case lsm_btree:put(Tree, K, V) of
@ -119,3 +129,15 @@ cleanup_trees(#state { btrees = BTs }) ->
BTs).
sync_range_gather(Ref) ->
sync_range_gather(Ref, []).
sync_range_gather(Ref, Acc) ->
receive
{fold_result, Ref, K, V} ->
sync_range_gather(Ref, [{K, V} | Acc]);
{fold_done, Ref} ->
{ok, Acc}
after 3000 ->
{error, timeout}
end.

154
test/lsm_btree_tests.erl
View file

@ -20,6 +20,7 @@
next_state/3, postcondition/3,
precondition/2]).
-record(tree, { elements = dict:new() }).
-record(state, { open = dict:new(),
closed = dict:new() }).
-define(SERVER, lsm_btree_drv).
@ -32,6 +33,8 @@ full_test_() ->
[
?_test(test_tree_simple_1()),
?_test(test_tree_simple_2()),
?_test(test_tree_simple_3()),
?_test(test_tree_simple_4()),
?_test(test_tree()),
{timeout, 120, ?_test(test_qc())}
]}.
@ -72,16 +75,20 @@ g_open_tree(Open) ->
%% Pick a name of a non-empty Btree
g_non_empty_btree(Open) ->
?LET(TreesWithKeys, dict:filter(fun(_K, D) -> dict:size(D) > 0 end, Open),
?LET(TreesWithKeys, dict:filter(fun(_K, #tree { elements = D}) ->
dict:size(D) > 0
end,
Open),
oneof(dict:fetch_keys(TreesWithKeys))).
g_existing_key(Name, Open) ->
oneof(dict:fetch_keys(dict:fetch(Name, Open))).
#tree { elements = Elems } = dict:fetch(Name, Open),
oneof(dict:fetch_keys(Elems)).
g_non_existing_key(Name, Open) ->
?SUCHTHAT(Key, g_fail_key(),
begin
D = dict:fetch(Name, Open),
#tree { elements = D } = dict:fetch(Name, Open),
not dict:is_key(Key, D)
end).
@ -93,7 +100,7 @@ btree_name(I) ->
initial_state() ->
ClosedBTrees = lists:foldl(fun(N, Closed) ->
dict:store(btree_name(N),
dict:new(),
#tree { },
Closed)
end,
dict:new(),
@ -103,41 +110,43 @@ initial_state() ->
command(#state { open = Open, closed = Closed } = S) ->
frequency(
[ {20, {call, ?SERVER, open, [oneof(dict:fetch_keys(Closed))]}}
|| closed_dicts(S)] ++
[ {20, {call, ?SERVER, close, [oneof(dict:fetch_keys(Open))]}}
|| open_dicts(S)] ++
[ {2000, {call, ?SERVER, put, cmd_put_args(S)}}
|| open_dicts(S)] ++
[ {1500, {call, ?SERVER, lookup_fail, cmd_lookup_fail_args(S)}}
|| open_dicts(S)] ++
[ {1500, {call, ?SERVER, lookup_exist, cmd_lookup_args(S)}}
|| open_dicts(S), open_dicts_with_keys(S)] ++
[ {500, {call, ?SERVER, delete_exist, cmd_delete_args(S)}}
|| open_dicts(S), open_dicts_with_keys(S)]).
[ {20, {call, ?SERVER, open, [oneof(dict:fetch_keys(Closed))]}}
|| closed_dicts(S)]
++ [ {20, {call, ?SERVER, close, [oneof(dict:fetch_keys(Open))]}}
|| open_dicts(S)]
++ [ {2000, {call, ?SERVER, put, cmd_put_args(S)}}
|| open_dicts(S)]
++ [ {1500, {call, ?SERVER, lookup_fail, cmd_lookup_fail_args(S)}}
|| open_dicts(S)]
++ [ {1500, {call, ?SERVER, lookup_exist, cmd_lookup_args(S)}}
|| open_dicts(S), open_dicts_with_keys(S)]
++ [ {500, {call, ?SERVER, delete_exist, cmd_delete_args(S)}}
|| open_dicts(S), open_dicts_with_keys(S)]
++ [ {250, {call, ?SERVER, sync_range, cmd_sync_range_args(S)}}
|| open_dicts(S), open_dicts_with_keys(S)]
).
%% Precondition (abstract)
precondition(#state { open = _Open}, {call, ?SERVER, delete_exist,
[_Name, _K]}) ->
%% No need to check since we limit this in the command/1 generator
true;
precondition(#state { open = _Open }, {call, ?SERVER, lookup_fail,
[_Name, _K]}) ->
%% We can always try to look up some non-existing key
true;
precondition(#state { open = _Open }, {call, ?SERVER, lookup_exist,
[_Name, _K]}) ->
%% No need to check since we limit this in the command/1 generator
true;
precondition(S, {call, ?SERVER, sync_range, [_Tree, _K1, _K2]}) ->
open_dicts(S) andalso open_dicts_with_keys(S);
precondition(S, {call, ?SERVER, delete_exist, [_Name, _K]}) ->
open_dicts(S) andalso open_dicts_with_keys(S);
precondition(S, {call, ?SERVER, lookup_fail, [_Name, _K]}) ->
open_dicts(S);
precondition(S, {call, ?SERVER, lookup_exist, [_Name, _K]}) ->
open_dicts(S) andalso open_dicts_with_keys(S);
precondition(#state { open = Open }, {call, ?SERVER, put, [Name, _K, _V]}) ->
dict:is_key(Name, Open);
precondition(#state { open = Open, closed = Closed }, {call, ?SERVER, open, [Name]}) ->
precondition(#state { open = Open, closed = Closed },
{call, ?SERVER, open, [Name]}) ->
(not (dict:is_key(Name, Open))) and (dict:is_key(Name, Closed));
precondition(#state { open = Open, closed = Closed }, {call, ?SERVER, close, [Name]}) ->
precondition(#state { open = Open, closed = Closed },
{call, ?SERVER, close, [Name]}) ->
(dict:is_key(Name, Open)) and (not dict:is_key(Name, Closed)).
%% Next state manipulation (abstract / concrete)
next_state(S, _Res, {call, ?SERVER, sync_range, [_Tree, _K1, _K2]}) ->
S;
next_state(S, _Res, {call, ?SERVER, lookup_fail, [_Name, _Key]}) ->
S;
next_state(S, _Res, {call, ?SERVER, lookup_exist, [_Name, _Key]}) ->
@ -145,31 +154,42 @@ next_state(S, _Res, {call, ?SERVER, lookup_exist, [_Name, _Key]}) ->
next_state(#state { open = Open} = S, _Res,
{call, ?SERVER, delete_exist, [Name, Key]}) ->
S#state { open = dict:update(Name,
fun(Dict) ->
dict:erase(Key, Dict)
fun(#tree { elements = Dict}) ->
#tree { elements =
dict:erase(Key, Dict)}
end,
Open)};
next_state(#state { open = Open} = S, _Res,
{call, ?SERVER, put, [Name, Key, Value]}) ->
S#state { open = dict:update(Name,
fun(Dict) ->
dict:store(Key, Value, Dict)
end,
Open)};
next_state(#state { open = Open, closed=Closed} = S, _Res, {call, ?SERVER, open, [Name]}) ->
S#state { open = dict:update(
Name,
fun(#tree { elements = Dict}) ->
#tree { elements =
dict:store(Key, Value, Dict) }
end,
Open)};
next_state(#state { open = Open, closed=Closed} = S,
_Res, {call, ?SERVER, open, [Name]}) ->
S#state { open = dict:store(Name, dict:fetch(Name, Closed) , Open),
closed = dict:erase(Name, Closed) };
next_state(#state { open = Open, closed=Closed} = S, _Res, {call, ?SERVER, close, [Name]}) ->
next_state(#state { open = Open, closed=Closed} = S, _Res,
{call, ?SERVER, close, [Name]}) ->
S#state { closed = dict:store(Name, dict:fetch(Name, Open) , Closed),
open = dict:erase(Name, Open) }.
%% Postcondition check (concrete)
postcondition(#state { open = Open},
{call, ?SERVER, sync_range, [Tree, K1, K2]}, {ok, Result}) ->
#tree { elements = TDict } = dict:fetch(Tree, Open),
lists:sort(dict_range_query(TDict, K1, K2))
== lists:sort(Result);
postcondition(_S,
{call, ?SERVER, lookup_fail, [_Name, _Key]}, notfound) ->
true;
postcondition(#state { open = Open },
{call, ?SERVER, lookup_exist, [Name, Key]}, {ok, Value}) ->
dict:fetch(Key, dict:fetch(Name, Open)) == Value;
#tree { elements = Elems } = dict:fetch(Name, Open),
dict:fetch(Key, Elems) == Value;
postcondition(_S, {call, ?SERVER, delete_exist, [_Name, _Key]}, ok) ->
true;
postcondition(_S, {call, ?SERVER, put, [_Name, _Key, _Value]}, ok) ->
@ -211,8 +231,28 @@ test_tree_simple_2() ->
ok = lsm_btree:delete(Tree, <<"ã">>),
ok = lsm_btree:close(Tree).
test_tree() ->
test_tree_simple_3() ->
{ok, Tree} = lsm_btree:open("simple"),
ok = lsm_btree:put(Tree, <<"X">>, <<"Y">>),
{ok, Ref} = lsm_btree:sync_range(Tree, <<"X">>, <<"X">>),
?assertEqual(ok,
receive
{fold_done, Ref} -> ok
after 1000 -> {error, timeout}
end),
ok = lsm_btree:close(Tree).
test_tree_simple_4() ->
Key = <<56,11,62,42,35,163,16,100,9,224,8,228,130,94,198,2,126,117,243,
1,122,175,79,159,212,177,30,153,71,91,85,233,41,199,190,58,3,
173,220,9>>,
Value = <<212,167,12,6,105,152,17,80,243>>,
{ok, Tree} = lsm_btree:open("simple"),
ok = lsm_btree:put(Tree, Key, Value),
?assertEqual({ok, Value}, lsm_btree:lookup(Tree, Key)),
ok = lsm_btree:close(Tree).
test_tree() ->
application:start(sasl),
{ok, Tree} = lsm_btree:open("simple2"),
@ -289,22 +329,35 @@ cmd_delete_args(#state { open = Open}) ->
?LET(Key, g_existing_key(Name, Open),
[Name, Key])).
cmd_sync_range_args(#state { open = Open }) ->
?LET(Tree, g_non_empty_btree(Open),
?LET({K1, K2}, {g_existing_key(Tree, Open),
g_existing_key(Tree, Open)},
[Tree, K1, K2])).
%% Context management
%% ----------------------------------------------------------------------
cleanup_test_trees(#state { open = Open}) ->
[cleanup_tree(N) || N <- dict:fetch_keys(Open)].
cleanup_test_trees(#state { open = Open, closed = Closed }) ->
[cleanup_tree(N) || N <- dict:fetch_keys(Open)],
[cleanup_tree(N) || N <- dict:fetch_keys(Closed)].
cleanup_tree(Tree) ->
{ok, FileNames} = file:list_dir(Tree),
[ok = file:delete(filename:join([Tree, Fname])) || Fname <- FileNames],
file:del_dir(Tree).
case file:list_dir(Tree) of
{error, enoent} ->
ok;
{ok, FileNames} ->
[ok = file:delete(filename:join([Tree, Fname]))
|| Fname <- FileNames],
file:del_dir(Tree)
end.
%% Various Helper routines
%% ----------------------------------------------------------------------
open_dicts_with_keys(#state { open = Open}) ->
lists:any(fun({_, D}) -> dict:size(D) > 0 end,
lists:any(fun({_, #tree { elements = D}}) ->
dict:size(D) > 0
end,
dict:to_list(Open)).
open_dicts(#state { open = Open}) ->
@ -313,4 +366,9 @@ open_dicts(#state { open = Open}) ->
closed_dicts(#state { closed = Closed}) ->
dict:size(Closed) > 0.
dict_range_query(Dict, LowKey, HighKey) ->
[{K, V} || {K, V} <- dict:to_list(Dict),
K >= LowKey,
K < HighKey].