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AutoRotation BugFixes #30

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Aug 29, 2016
Merged

AutoRotation BugFixes #30

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89 changes: 54 additions & 35 deletions src/kvs.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ stop() -> stop (#kvs{mod=?DBA}).
destroy() -> destroy (#kvs{mod=?DBA}).
version() -> version (#kvs{mod=?DBA}).
dir() -> dir (#kvs{mod=?DBA}).
next_id(Table,DX) -> next_id(Table, DX, #kvs{mod=?DBA}).
next_id(Table,DX) -> next_id(Table, DX, #kvs{mod=?DBA}).

generation(Table,Key) ->
case Key - topleft(Table,Key) < norm(application:get_env(kvs,generation,{?MODULE,limit}),Table,Key) of
Expand Down Expand Up @@ -67,7 +67,8 @@ destroy(#kvs{mod=DBA}) -> DBA:destroy().
join(Node,#kvs{mod=DBA}) -> DBA:join(Node), rotate_new(), load_partitions(), load_config().
version(#kvs{mod=DBA}) -> DBA:version().
tables() -> lists:flatten([ (M:metainfo())#schema.tables || M <- modules() ]).
table(Name) -> lists:keyfind(Name,#table.name,tables()).
table(Name) when is_atom(Name) -> lists:keyfind(rname(Name),#table.name,tables());
table(_) -> false.
dir(#kvs{mod=DBA}) -> DBA:dir().
info(T,#kvs{mod=DBA}) -> DBA:info(T).
modules() -> kvs:config(schema).
Expand Down Expand Up @@ -254,10 +255,13 @@ get(RecordName, Key, #kvs{mod=Mod}) ->
{ok,Record} -> {ok,setelement(1,Record,kvs:last(RecordName,Key))};
Else -> Else end end.

count(RecordName,#kvs{mod=DBA}) -> DBA:count(RecordName).
all(RecordName,#kvs{mod=DBA}) -> DBA:all(RecordName).
index(RecordName, Key, Value,#kvs{mod=DBA}) -> DBA:index(RecordName, Key, Value).
next_id(RecordName, Incr,#kvs{mod=DBA}) -> DBA:next_id(RecordName, Incr).
count(Tab,#kvs{mod=DBA}) -> lists:foldl(fun(T,A) -> DBA:count(T) + A end, 0, rlist(Tab)).
all(Tab,#kvs{mod=DBA}) ->
lists:flatten([ rnorm(rname(Tab),DBA:all(T)) || T <- rlist(Tab) ]).
index(Tab, Key, Value,#kvs{mod=DBA}) ->
lists:flatten([ rnorm(rname(Tab),DBA:index(T, Key, Value)) || T <- rlist(Tab) ]).
next_id(Tab, Incr,#kvs{mod=DBA}) ->
DBA:next_id(case table(Tab) of #table{} -> atom_to_list(Tab); _ -> Tab end, Incr).

save_db(Path) ->
Data = lists:append([all(B) || B <- [list_to_atom(Name) || {table,Name} <- kvs:dir()] ]),
Expand Down Expand Up @@ -296,15 +300,27 @@ info(Module, String, Args) -> log(Module, String, Args, info_msg).
warning(Module,String, Args) -> log(Module, String, Args, warning_msg).
error(Module, String, Args) -> log(Module, String, Args, error_msg).

dump() ->
io:format("~20w ~20w ~10w ~10w~n",[name,storage_type,memory,size]),
[ io:format("~20w ~20w ~10w ~10w~n",[Name,
mnesia:table_info(Name,storage_type),
mnesia:table_info(Name,memory),
mnesia:table_info(Name,size)]) || #table{name=Name} <- kvs:tables()],
io:format("Snapshot taken: ~p~n",[calendar:now_to_datetime(os:timestamp())]).

% Table Partitions
dump() -> dump([ rlist(N) || #table{name=N} <- kvs:tables() ]).
dump(short) ->
Gen = fun(T) ->
{S,M,C}=lists:unzip3([ dump_info(R) || R <- rlist(T) ]),
{lists:usort(S),lists:sum(M),lists:sum(C)}
end,
dump_format([ {T,Gen(T)} || T <- [ N || #table{name=N} <- kvs:tables() ] ]);
dump(Table) when is_atom(Table) -> dump(rlist(Table));
dump(Tables) ->
dump_format([{case nname(T) of 1 -> rname(T); _ -> T end,dump_info(T)} || T <- lists:flatten(Tables) ]).
dump_info(T) ->
{mnesia:table_info(T,storage_type),
mnesia:table_info(T,memory) * erlang:system_info(wordsize) / 1024 / 1024,
mnesia:table_info(T,size)}.
dump_format(List) ->
io:format("~20s ~32s ~14s ~10s~n~n",["NAME","STORAGE TYPE","MEMORY (MB)","ELEMENTS"]),
[ io:format("~20s ~32w ~14.2f ~10b~n",[T,S,M,C]) || {T,{S,M,C}} <- List ],
io:format("~nSnapshot taken: ~p~n",[calendar:now_to_datetime(os:timestamp())]).

% Table Partitions

range(RecordName,Id) -> (find(kvs:config(kvs:rname(RecordName)),RecordName,Id))#interval.name.
topleft(RecordName,Id) -> (find(kvs:config(kvs:rname(RecordName)),RecordName,Id))#interval.left.
Expand All @@ -318,27 +334,30 @@ find([Range|T],RecordName,Id) ->

lookup(#interval{left=Left,right=Right,name=Name}=I,Id) when Id =< Right, Id >= Left -> I;
lookup(#interval{},_) -> [].

rotate_new() -> N = [ kvs:rotate(kvs:table(T)) || {T,_} <- fold_tables(),
length(proplists:get_value(attributes,kvs:info(last_disc(T)),[])) /=
length((kvs:table(kvs:last_table(rname(T))))#table.fields)
], io:format("Nonexistent: ~p~n",[N]), N.
rotate(#table{}=T) -> Name = name(rname(T#table.name)),
init(setelement(#table.name,kvs:table(kvs:last_table(T#table.name)),Name)),
update_config(rname(T#table.name),Name);
rotate(Table) -> Intervals = kvs:config(Table),
{M,F} = application:get_env(kvs,forbidding,{?MODULE,forbid}),
New = lists:sublist(Intervals,M:F(Table)),
Delete = Intervals -- New,
[ mnesia:change_table_copy_type(Name, node(), disc_only_copies)
|| #interval{name=Name} <- shd(Delete) ],
% kvs:put(#config{key=Table,value=New}),
rotate(kvs:table(Table)),
ok.
load_partitions() -> [ case kvs:get(config,Table) of
{ok,{config,_,List}} -> application:set_env(kvs,Table,List);
Else -> ok end || {table,Table} <- kvs:dir() ].


rotate_new() ->
N = [ kvs:rotate(kvs:table(T)) || {T,_} <- fold_tables(),
length(proplists:get_value(attributes,info(last_disc(T)),[])) /= length((table(rname(T)))#table.fields) ],
io:format("Nonexistent: ~p~n",[N]), N.
rotate(#table{name=N}) ->
R = name(rname(N)),
init(setelement(N,kvs:table(N),R)),
update_config(rname(N),R);
rotate(Table) ->
Intervals = kvs:config(Table),
{M,F} = application:get_env(kvs,forbidding,{?MODULE,forbid}),
New = lists:sublist(Intervals,M:F(Table)),
Delete = Intervals -- New,
[ mnesia:change_table_copy_type(Name, node(), disc_only_copies) || #interval{name=Name}
<- shd(Delete) ],
rotate(kvs:table(Table)), ok.
load_partitions() ->
[ case kvs:get(config,Table) of
{ok,{config,_,List}} -> application:set_env(kvs,Table,List);
Else -> ok end || {table,Table} <- kvs:dir() ].

rnorm(Tag,List) -> [ setelement(1,R,Tag) || R <- List ].
rlist(Table) -> [ N || #interval{name=N} <- kvs:config(Table) ]++[Table].
shd([]) -> [];
shd(X) -> [hd(X)].
wait() -> timer:tc(fun() -> mnesia:wait_for_tables([ T#table.name || T <- kvs:tables()],infinity) end).
Expand Down