diff options
Diffstat (limited to 'lib/mnesia')
| -rw-r--r-- | lib/mnesia/src/mnesia_frag.erl | 67 |
1 files changed, 41 insertions, 26 deletions
diff --git a/lib/mnesia/src/mnesia_frag.erl b/lib/mnesia/src/mnesia_frag.erl index cbb0dfb3be..e64aa8ee23 100644 --- a/lib/mnesia/src/mnesia_frag.erl +++ b/lib/mnesia/src/mnesia_frag.erl @@ -183,6 +183,8 @@ table_info2(ActivityId, Opaque, Tab, Frag, Item) -> length(val({Tab, disc_copies})); n_disc_only_copies -> length(val({Tab, disc_only_copies})); + n_external_copies -> + length(val({Tab, external_copies})); frag_names -> frag_names(Tab); @@ -498,13 +500,13 @@ expand_cstruct(Cs, Mode) -> %% Verify keys ValidKeys = [foreign_key, n_fragments, node_pool, n_ram_copies, n_disc_copies, n_disc_only_copies, - hash_module, hash_state], + n_external_copies, hash_module, hash_state], Keys = mnesia_schema:check_keys(Tab, Props, ValidKeys), mnesia_schema:check_duplicates(Tab, Keys), %% Pick fragmentation props ForeignKey = mnesia_schema:pick(Tab, foreign_key, Props, undefined), - {ForeignKey2, N, Pool, DefaultNR, DefaultND, DefaultNDO} = + {ForeignKey2, N, Pool, DefaultNR, DefaultND, DefaultNDO, DefaultNExt} = pick_props(Tab, Cs, ForeignKey), %% Verify node_pool @@ -518,6 +520,7 @@ expand_cstruct(Cs, Mode) -> NR = mnesia_schema:pick(Tab, n_ram_copies, Props, 0), ND = mnesia_schema:pick(Tab, n_disc_copies, Props, 0), NDO = mnesia_schema:pick(Tab, n_disc_only_copies, Props, 0), + NExt = mnesia_schema:pick(Tab, n_external_copies, Props, 0), PosInt = fun(I) when is_integer(I), I >= 0 -> true; (_I) -> false @@ -528,6 +531,8 @@ expand_cstruct(Cs, Mode) -> {bad_type, Tab, {n_disc_copies, ND}}), mnesia_schema:verify(true, PosInt(NDO), {bad_type, Tab, {n_disc_only_copies, NDO}}), + mnesia_schema:verify(true, PosInt(NExt), + {bad_type, Tab, {n_external_copies, NDO}}), %% Verify n_fragments Cs2 = verify_n_fragments(N, Cs, Mode), @@ -542,13 +547,13 @@ expand_cstruct(Cs, Mode) -> hash_module = HashMod, hash_state = HashState2}, if - NR == 0, ND == 0, NDO == 0 -> - do_expand_cstruct(Cs2, FH, N, Pool, DefaultNR, DefaultND, DefaultNDO, Mode); + NR == 0, ND == 0, NDO == 0, NExt == 0 -> + do_expand_cstruct(Cs2, FH, N, Pool, DefaultNR, DefaultND, DefaultNDO, DefaultNExt, Mode); true -> - do_expand_cstruct(Cs2, FH, N, Pool, NR, ND, NDO, Mode) + do_expand_cstruct(Cs2, FH, N, Pool, NR, ND, NDO, NExt, Mode) end. -do_expand_cstruct(Cs, FH, N, Pool, NR, ND, NDO, Mode) -> +do_expand_cstruct(Cs, FH, N, Pool, NR, ND, NDO, NExt, Mode) -> Tab = Cs#cstruct.name, LC = Cs#cstruct.local_content, @@ -562,14 +567,15 @@ do_expand_cstruct(Cs, FH, N, Pool, NR, ND, NDO, Mode) -> %% Add empty fragments CommonProps = [{base_table, Tab}], Cs2 = Cs#cstruct{frag_properties = lists:sort(CommonProps)}, - expand_frag_cstructs(N, NR, ND, NDO, Cs2, Pool, Pool, FH, Mode). + expand_frag_cstructs(N, NR, ND, NDO, NExt, Cs2, Pool, Pool, FH, Mode). verify_n_fragments(N, Cs, Mode) when is_integer(N), N >= 1 -> case Mode of create -> Cs#cstruct{ram_copies = [], disc_copies = [], - disc_only_copies = []}; + disc_only_copies = [], + external_copies = []}; activate -> Reason = {combine_error, Cs#cstruct.name, {n_fragments, N}}, mnesia_schema:verify(1, N, Reason), @@ -607,7 +613,8 @@ pick_props(Tab, Cs, {ForeignTab, Attr}) -> DefaultNR = length(val({ForeignTab, ram_copies})), DefaultND = length(val({ForeignTab, disc_copies})), DefaultNDO = length(val({ForeignTab, disc_only_copies})), - {Key, N, Pool, DefaultNR, DefaultND, DefaultNDO}; + DefaultNExt = length(val({ForeignTab, external_copies})), + {Key, N, Pool, DefaultNR, DefaultND, DefaultNDO, DefaultNExt}; pick_props(Tab, Cs, undefined) -> Props = Cs#cstruct.frag_properties, DefaultN = 1, @@ -617,22 +624,23 @@ pick_props(Tab, Cs, undefined) -> DefaultNR = 1, DefaultND = 0, DefaultNDO = 0, - {undefined, N, Pool, DefaultNR, DefaultND, DefaultNDO}; + DefaultNExt = 0, + {undefined, N, Pool, DefaultNR, DefaultND, DefaultNDO, DefaultNExt}; pick_props(Tab, _Cs, BadKey) -> mnesia:abort({bad_type, Tab, {foreign_key, BadKey}}). -expand_frag_cstructs(N, NR, ND, NDO, CommonCs, Dist, Pool, FH, Mode) +expand_frag_cstructs(N, NR, ND, NDO, NExt, CommonCs, Dist, Pool, FH, Mode) when N > 1, Mode == create -> Frag = n_to_frag_name(CommonCs#cstruct.name, N), Cs = CommonCs#cstruct{name = Frag}, - {Cs2, RevModDist, RestDist} = set_frag_nodes(NR, ND, NDO, Cs, Dist, []), + {Cs2, RevModDist, RestDist} = set_frag_nodes(NR, ND, NDO, NExt, Cs, Dist, []), ModDist = lists:reverse(RevModDist), Dist2 = rearrange_dist(Cs, ModDist, RestDist, Pool), %% Adjusts backwards, but it doesn't matter. {FH2, _FromFrags, _AdditionalWriteFrags} = adjust_before_split(FH), - CsList = expand_frag_cstructs(N - 1, NR, ND, NDO, CommonCs, Dist2, Pool, FH2, Mode), + CsList = expand_frag_cstructs(N - 1, NR, ND, NDO, NExt, CommonCs, Dist2, Pool, FH2, Mode), [Cs2 | CsList]; -expand_frag_cstructs(1, NR, ND, NDO, CommonCs, Dist, Pool, FH, Mode) -> +expand_frag_cstructs(1, NR, ND, NDO, NExt, CommonCs, Dist, Pool, FH, Mode) -> BaseProps = CommonCs#cstruct.frag_properties ++ [{foreign_key, FH#frag_state.foreign_key}, {hash_module, FH#frag_state.hash_module}, @@ -645,25 +653,29 @@ expand_frag_cstructs(1, NR, ND, NDO, CommonCs, Dist, Pool, FH, Mode) -> activate -> [BaseCs]; create -> - {BaseCs2, _, _} = set_frag_nodes(NR, ND, NDO, BaseCs, Dist, []), + {BaseCs2, _, _} = set_frag_nodes(NR, ND, NDO, NExt, BaseCs, Dist, []), [BaseCs2] end. -set_frag_nodes(NR, ND, NDO, Cs, [Head | Tail], Acc) when NR > 0 -> +set_frag_nodes(NR, ND, NDO, NExt, Cs, [Head | Tail], Acc) when NR > 0 -> Pos = #cstruct.ram_copies, {Cs2, Head2} = set_frag_node(Cs, Pos, Head), - set_frag_nodes(NR - 1, ND, NDO, Cs2, Tail, [Head2 | Acc]); -set_frag_nodes(NR, ND, NDO, Cs, [Head | Tail], Acc) when ND > 0 -> + set_frag_nodes(NR - 1, ND, NDO, NExt, Cs2, Tail, [Head2 | Acc]); +set_frag_nodes(NR, ND, NDO, NExt, Cs, [Head | Tail], Acc) when ND > 0 -> Pos = #cstruct.disc_copies, {Cs2, Head2} = set_frag_node(Cs, Pos, Head), - set_frag_nodes(NR, ND - 1, NDO, Cs2, Tail, [Head2 | Acc]); -set_frag_nodes(NR, ND, NDO, Cs, [Head | Tail], Acc) when NDO > 0 -> + set_frag_nodes(NR, ND - 1, NDO, NExt, Cs2, Tail, [Head2 | Acc]); +set_frag_nodes(NR, ND, NDO, NExt, Cs, [Head | Tail], Acc) when NDO > 0 -> Pos = #cstruct.disc_only_copies, {Cs2, Head2} = set_frag_node(Cs, Pos, Head), - set_frag_nodes(NR, ND, NDO - 1, Cs2, Tail, [Head2 | Acc]); -set_frag_nodes(0, 0, 0, Cs, RestDist, ModDist) -> + set_frag_nodes(NR, ND, NDO - 1, NExt, Cs2, Tail, [Head2 | Acc]); +set_frag_nodes(NR, ND, NDO, NExt, Cs, [Head | Tail], Acc) when NExt > 0 -> + Pos = #cstruct.external_copies, + {Cs2, Head2} = set_frag_node(Cs, Pos, Head), + set_frag_nodes(NR, ND, NDO, NExt - 1, Cs2, Tail, [Head2 | Acc]); +set_frag_nodes(0, 0, 0, 0, Cs, RestDist, ModDist) -> {Cs, ModDist, RestDist}; -set_frag_nodes(_, _, _, Cs, [], _) -> +set_frag_nodes(_, _, _, _, Cs, [], _) -> mnesia:abort({combine_error, Cs#cstruct.name, "Too few nodes in node_pool"}). set_frag_node(Cs, Pos, Head) -> @@ -840,13 +852,15 @@ make_add_frag(Tab, SortedNs) -> NR = length(Cs#cstruct.ram_copies), ND = length(Cs#cstruct.disc_copies), NDO = length(Cs#cstruct.disc_only_copies), + NExt = length(Cs#cstruct.external_copies), NewCs = Cs#cstruct{name = NewFrag, frag_properties = [{base_table, Tab}], ram_copies = [], disc_copies = [], - disc_only_copies = []}, + disc_only_copies = [], + external_copies = []}, - {NewCs2, _, _} = set_frag_nodes(NR, ND, NDO, NewCs, SortedNs, []), + {NewCs2, _, _} = set_frag_nodes(NR, ND, NDO, NExt, NewCs, SortedNs, []), [NewOp] = mnesia_schema:make_create_table(NewCs2), SplitOps = split(Tab, FH2, FromIndecies, FragNames, []), @@ -1319,7 +1333,8 @@ count_frag([Frag | Frags], Dist) -> Dist2 = incr_nodes(val({Frag, ram_copies}), Dist), Dist3 = incr_nodes(val({Frag, disc_copies}), Dist2), Dist4 = incr_nodes(val({Frag, disc_only_copies}), Dist3), - count_frag(Frags, Dist4); + Dist5 = incr_nodes(val({Frag, external_copies}), Dist4), + count_frag(Frags, Dist5); count_frag([], Dist) -> Dist. |