From 11174a0a472a59f011a3530ebeb11eaa7f9d9b02 Mon Sep 17 00:00:00 2001 From: Dan Gudmundsson Date: Thu, 9 Aug 2018 16:03:44 +0200 Subject: Relax add_table_copy restriction Allow to add replicas even if all other replicas are down when the other replicase are not stored on disk. --- lib/mnesia/src/mnesia_controller.erl | 27 +++++++-------- lib/mnesia/src/mnesia_loader.erl | 8 ++--- lib/mnesia/test/mnesia_evil_coverage_test.erl | 47 ++++++++++++++++++++++++++- 3 files changed, 61 insertions(+), 21 deletions(-) (limited to 'lib') diff --git a/lib/mnesia/src/mnesia_controller.erl b/lib/mnesia/src/mnesia_controller.erl index 77013489b3..81518c2bb3 100644 --- a/lib/mnesia/src/mnesia_controller.erl +++ b/lib/mnesia/src/mnesia_controller.erl @@ -771,22 +771,6 @@ handle_call({unannounce_add_table_copy, [Tab, Node], From}, ReplyTo, State) -> noreply(State#state{early_msgs = [{call, Msg, undefined} | Msgs]}) end; -handle_call({net_load, Tab, Cs}, From, State) -> - State2 = - case State#state.schema_is_merged of - true -> - Worker = #net_load{table = Tab, - opt_reply_to = From, - reason = {dumper,{add_table_copy, unknown}}, - cstruct = Cs - }, - add_worker(Worker, State); - false -> - reply(From, {not_loaded, schema_not_merged}), - State - end, - noreply(State2); - handle_call(Msg, From, State) when State#state.schema_is_merged /= true -> %% Buffer early messages Msgs = State#state.early_msgs, @@ -2161,6 +2145,15 @@ load_table_fun(#net_load{cstruct=Cs, table=Tab, reason=Reason, opt_reply_to=Repl {dumper,{add_table_copy,_}} -> true; _ -> false end, + + OnlyRamCopies = case Cs of + #cstruct{disc_copies = DC, + disc_only_copies = DOC, + external_copies = Ext} -> + [] =:= (DC ++ (DOC ++ Ext)) -- [node()]; + _ -> + false + end, if ReadNode == node() -> %% Already loaded locally @@ -2172,6 +2165,8 @@ load_table_fun(#net_load{cstruct=Cs, table=Tab, reason=Reason, opt_reply_to=Repl end; AccessMode == read_only, not AddTableCopy -> fun() -> disc_load_table(Tab, Reason, ReplyTo) end; + Active =:= [], AddTableCopy, OnlyRamCopies -> + fun() -> disc_load_table(Tab, Reason, ReplyTo) end; true -> fun() -> %% Either we cannot read the table yet diff --git a/lib/mnesia/src/mnesia_loader.erl b/lib/mnesia/src/mnesia_loader.erl index 4c6336cb73..39704c65f9 100644 --- a/lib/mnesia/src/mnesia_loader.erl +++ b/lib/mnesia/src/mnesia_loader.erl @@ -66,7 +66,7 @@ do_get_disc_copy2(Tab, Reason, Storage, Type) when Storage == disc_copies -> EtsOpts = proplists:get_value(ets, StorageProps, []), Args = [{keypos, 2}, public, named_table, Type | EtsOpts], case Reason of - {dumper, _} -> %% Resources already allocated + {dumper, DR} when is_atom(DR) -> %% Resources already allocated ignore; _ -> mnesia_monitor:mktab(Tab, Args), @@ -90,8 +90,8 @@ do_get_disc_copy2(Tab, Reason, Storage, Type) when Storage == ram_copies -> EtsOpts = proplists:get_value(ets, StorageProps, []), Args = [{keypos, 2}, public, named_table, Type | EtsOpts], case Reason of - {dumper, _} -> %% Resources allready allocated - ignore; + {dumper, DR} when is_atom(DR) -> + ignore; %% Resources already allocated _ -> mnesia_monitor:mktab(Tab, Args), Fname = mnesia_lib:tab2dcd(Tab), @@ -130,7 +130,7 @@ do_get_disc_copy2(Tab, Reason, Storage, Type) when Storage == disc_only_copies - {repair, mnesia_monitor:get_env(auto_repair)} | DetsOpts], case Reason of - {dumper, _} -> + {dumper, DR} when is_atom(DR) -> mnesia_index:init_index(Tab, Storage), snmpify(Tab, Storage), set({Tab, load_node}, node()), diff --git a/lib/mnesia/test/mnesia_evil_coverage_test.erl b/lib/mnesia/test/mnesia_evil_coverage_test.erl index 074967469b..506b1a9372 100644 --- a/lib/mnesia/test/mnesia_evil_coverage_test.erl +++ b/lib/mnesia/test/mnesia_evil_coverage_test.erl @@ -31,6 +31,7 @@ db_node_lifecycle/1, evil_delete_db_node/1, start_and_stop/1, checkpoint/1, table_lifecycle/1, storage_options/1, add_copy_conflict/1, add_copy_when_going_down/1, + add_copy_with_down/1, replica_management/1, clear_table_during_load/1, schema_availability/1, local_content/1, replica_location/1, user_properties/1, unsupp_user_props/1, @@ -65,7 +66,8 @@ all() -> db_node_lifecycle, evil_delete_db_node, start_and_stop, checkpoint, table_lifecycle, storage_options, add_copy_conflict, - add_copy_when_going_down, replica_management, clear_table_during_load, + add_copy_when_going_down, add_copy_with_down, replica_management, + clear_table_during_load, schema_availability, local_content, {group, table_access_modifications}, replica_location, {group, table_sync}, user_properties, unsupp_user_props, @@ -732,6 +734,49 @@ add_copy_when_going_down(Config) -> ?match_receive({test,{aborted,_}}), ?verify_mnesia([Node2], []). +add_copy_with_down(suite) -> []; +add_copy_with_down(Config) -> + %% Allow add_table_copy() with ram_copies even all other replicas are down + Nodes = [Node1, Node2, Node3] = ?acquire_nodes(3, Config), + ?match({atomic, ok}, mnesia:create_table(a, [{ram_copies, [Node3]}, {disc_copies, [Node2]}])), + stopped = rpc:call(Node2, mnesia, stop, []), + stopped = rpc:call(Node3, mnesia, stop, []), + ?match({aborted, _}, mnesia:add_table_copy(a, Node1, ram_copies)), + ?match({aborted, _}, mnesia:del_table_copy(a, Node2)), + ok = rpc:call(Node3, mnesia, start, []), + ?match({aborted, _}, mnesia:add_table_copy(a, Node1, ram_copies)), + ?match([], mnesia_test_lib:start_mnesia([Node2], [a])), + ?match({atomic, ok}, mnesia:change_table_copy_type(a, Node2, ram_copies)), + stopped = rpc:call(Node2, mnesia, stop, []), + stopped = rpc:call(Node3, mnesia, stop, []), + ?match({atomic, ok}, mnesia:add_table_copy(a, Node1, ram_copies)), + ?match(ok, mnesia:dirty_write({a,1,1})), + ?match([], mnesia_test_lib:start_mnesia([Node2,Node3], [a])), + ?match([{a,1,1}], rpc:call(Node1, mnesia, dirty_read, [{a,1}])), + ?match([{a,1,1}], rpc:call(Node2, mnesia, dirty_read, [{a,1}])), + ?match([{a,1,1}], rpc:call(Node3, mnesia, dirty_read, [{a,1}])), + + ?match({atomic, ok}, mnesia:del_table_copy(a, Node1)), + stopped = rpc:call(Node2, mnesia, stop, []), + stopped = rpc:call(Node3, mnesia, stop, []), + ?match({atomic, ok}, mnesia:add_table_copy(a, Node1, disc_copies)), + ?match(ok, mnesia:dirty_write({a,1,1})), + ?match([], mnesia_test_lib:start_mnesia([Node2,Node3], [a])), + ?match([{a,1,1}], rpc:call(Node1, mnesia, dirty_read, [{a,1}])), + ?match([{a,1,1}], rpc:call(Node2, mnesia, dirty_read, [{a,1}])), + ?match([{a,1,1}], rpc:call(Node3, mnesia, dirty_read, [{a,1}])), + + ?match({atomic, ok}, mnesia:del_table_copy(a, Node1)), + stopped = rpc:call(Node2, mnesia, stop, []), + stopped = rpc:call(Node3, mnesia, stop, []), + ?match({atomic, ok}, mnesia:add_table_copy(a, Node1, disc_only_copies)), + ?match(ok, mnesia:dirty_write({a,1,1})), + ?match([], mnesia_test_lib:start_mnesia([Node2,Node3], [a])), + ?match([{a,1,1}], rpc:call(Node1, mnesia, dirty_read, [{a,1}])), + ?match([{a,1,1}], rpc:call(Node2, mnesia, dirty_read, [{a,1}])), + ?match([{a,1,1}], rpc:call(Node3, mnesia, dirty_read, [{a,1}])), + + ?verify_mnesia(Nodes, []). %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% Add, drop and move replicas, change storage types -- cgit v1.2.3