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-rw-r--r--lib/mnesia/doc/src/mnesia.xml6
-rw-r--r--lib/mnesia/src/mnesia_dumper.erl44
-rw-r--r--lib/mnesia/src/mnesia_loader.erl7
-rw-r--r--lib/mnesia/src/mnesia_monitor.erl4
4 files changed, 38 insertions, 23 deletions
diff --git a/lib/mnesia/doc/src/mnesia.xml b/lib/mnesia/doc/src/mnesia.xml
index 72e9bd7e8f..842f1641dd 100644
--- a/lib/mnesia/doc/src/mnesia.xml
+++ b/lib/mnesia/doc/src/mnesia.xml
@@ -3017,6 +3017,12 @@ raise(Name, Amount) ->
totally unpredictable.</p>
</item>
<item>
+ <p><c>-mnesia dump_disc_copies_at_startup true | false</c>.
+ If set to false, this disables the dumping of <c>disc_copies</c>
+ tables during startup while tables are being loaded. The default
+ is true.</p>
+ </item>
+ <item>
<p><c>-mnesia dump_log_load_regulation true | false</c>.
Controls if the log dumps should be performed as fast as
possible or if the dumper should do its own load
diff --git a/lib/mnesia/src/mnesia_dumper.erl b/lib/mnesia/src/mnesia_dumper.erl
index 14665797a0..b784f2aca3 100644
--- a/lib/mnesia/src/mnesia_dumper.erl
+++ b/lib/mnesia/src/mnesia_dumper.erl
@@ -34,6 +34,7 @@
-export([
get_log_writes/0,
incr_log_writes/0,
+ needs_dump_ets/1,
raw_dump_table/2,
raw_named_dump_table/2,
start_regulator/0,
@@ -981,28 +982,10 @@ open_files(_Tab, _Storage, _UpdateInPlace, _InitBy) ->
false.
open_disc_copies(Tab, InitBy) ->
- DclF = mnesia_lib:tab2dcl(Tab),
- DumpEts =
- case file:read_file_info(DclF) of
- {error, enoent} ->
- false;
- {ok, DclInfo} ->
- DcdF = mnesia_lib:tab2dcd(Tab),
- case file:read_file_info(DcdF) of
- {error, Reason} ->
- mnesia_lib:dbg_out("File ~p info_error ~p ~n",
- [DcdF, Reason]),
- true;
- {ok, DcdInfo} ->
- Mul = case ?catch_val(dc_dump_limit) of
- {'EXIT', _} -> ?DumpToEtsMultiplier;
- Val -> Val
- end,
- DcdInfo#file_info.size =< (DclInfo#file_info.size * Mul)
- end
- end,
+ DumpEts = needs_dump_ets(Tab),
if
DumpEts == false; InitBy == startup ->
+ DclF = mnesia_lib:tab2dcl(Tab),
mnesia_log:open_log({?MODULE,Tab},
mnesia_log:dcl_log_header(),
DclF,
@@ -1017,6 +1000,27 @@ open_disc_copies(Tab, InitBy) ->
false
end.
+needs_dump_ets(Tab) ->
+ DclF = mnesia_lib:tab2dcl(Tab),
+ case file:read_file_info(DclF) of
+ {error, enoent} ->
+ false;
+ {ok, DclInfo} ->
+ DcdF = mnesia_lib:tab2dcd(Tab),
+ case file:read_file_info(DcdF) of
+ {error, Reason} ->
+ mnesia_lib:dbg_out("File ~p info_error ~p ~n",
+ [DcdF, Reason]),
+ true;
+ {ok, DcdInfo} ->
+ Mul = case ?catch_val(dc_dump_limit) of
+ {'EXIT', _} -> ?DumpToEtsMultiplier;
+ Val -> Val
+ end,
+ DcdInfo#file_info.size =< (DclInfo#file_info.size * Mul)
+ end
+ end.
+
%% Always opens the dcl file for writing overriding already_dumped
%% mechanismen, used for schema transactions.
open_dcl(Tab) ->
diff --git a/lib/mnesia/src/mnesia_loader.erl b/lib/mnesia/src/mnesia_loader.erl
index 4afbea1cc2..ebd68c226a 100644
--- a/lib/mnesia/src/mnesia_loader.erl
+++ b/lib/mnesia/src/mnesia_loader.erl
@@ -69,9 +69,10 @@ do_get_disc_copy2(Tab, Reason, Storage, Type) when Storage == disc_copies ->
ignore;
_ ->
mnesia_monitor:mktab(Tab, Args),
- Count = mnesia_log:dcd2ets(Tab, Repair),
- case ets:info(Tab, size) of
- X when X < Count * 4 ->
+ _Count = mnesia_log:dcd2ets(Tab, Repair),
+ case mnesia_monitor:get_env(dump_disc_copies_at_startup)
+ andalso mnesia_dumper:needs_dump_ets(Tab) of
+ true ->
ok = mnesia_log:ets2dcd(Tab);
_ ->
ignore
diff --git a/lib/mnesia/src/mnesia_monitor.erl b/lib/mnesia/src/mnesia_monitor.erl
index 6fc1a394a6..a0e0e630ec 100644
--- a/lib/mnesia/src/mnesia_monitor.erl
+++ b/lib/mnesia/src/mnesia_monitor.erl
@@ -664,6 +664,7 @@ env() ->
backup_module,
debug,
dir,
+ dump_disc_copies_at_startup,
dump_log_load_regulation,
dump_log_time_threshold,
dump_log_update_in_place,
@@ -692,6 +693,8 @@ default_env(debug) ->
default_env(dir) ->
Name = lists:concat(["Mnesia.", node()]),
filename:absname(Name);
+default_env(dump_disc_copies_at_startup) ->
+ true;
default_env(dump_log_load_regulation) ->
false;
default_env(dump_log_time_threshold) ->
@@ -741,6 +744,7 @@ do_check_type(debug, trace) -> trace;
do_check_type(debug, true) -> debug;
do_check_type(debug, verbose) -> verbose;
do_check_type(dir, V) -> filename:absname(V);
+do_check_type(dump_disc_copies_at_startup, B) -> bool(B);
do_check_type(dump_log_load_regulation, B) -> bool(B);
do_check_type(dump_log_time_threshold, I) when is_integer(I), I > 0 -> I;
do_check_type(dump_log_update_in_place, B) -> bool(B);