Created
August 3, 2012 19:53
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detect bad merge index files
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#!/usr/bin/env escript | |
%% -*- erlang -*- | |
-include_lib("kernel/include/file.hrl"). | |
-compile(export_all). | |
-define(LOG(S), io:format(S)). | |
-define(LOG(S,A), io:format(S,A)). | |
main(Dirs) -> | |
CodePath = case os:getenv("RIAK_LIB") of | |
false -> throw("RIAK_LIB must be set"); | |
Val -> filelib:wildcard(filename:join([Val, "*/ebin"])) | |
end, | |
?LOG("CodePath: ~p~n", [CodePath]), | |
code:add_paths(CodePath), | |
code:ensure_loaded(mi_segment), | |
case code:is_loaded(mi_segment) of | |
false -> throw("Could not load mi_segment"); | |
_ -> ok | |
end, | |
application:load(merge_index), | |
[detect_bad_files(D) || D <- Dirs]; | |
main(_) -> | |
usage(). | |
usage() -> | |
io:format("usage: detect-bad-files <code-path> <mi-root-dir>~n"). | |
detect_bad_files(Dir) -> | |
detect_bad_buffers(Dir), | |
detect_unmatched_segs(Dir), | |
detect_bad_seg_offsets(Dir), | |
detect_bad_segs(Dir). | |
detect_bad_buffers(Dir) -> | |
?LOG("Checking for bad buffers...~n"), | |
Buffs = file_glob(Dir, "buffer*"), | |
[check_buffer(B) || B <- Buffs]. | |
check_buffer(Buff) -> | |
try | |
mi_buffer:new(Buff) | |
catch _:Reason -> | |
?LOG("BAD_BUFFER_DETECTED: ~p~n~p~n~p~n", | |
[Buff, Reason, erlang:get_stacktrace()]) | |
end. | |
detect_unmatched_segs(Dir) -> | |
?LOG("Checking for unmatched segments...~n"), | |
Offsets = file_glob(Dir, "*.offsets"), | |
Segs = file_glob(Dir, "*.data"), | |
Offsets2 = ordsets:from_list([offset_clean(O) || O <- Offsets]), | |
Segs2 = ordsets:from_list([seg_clean(S) || S <- Segs]), | |
MissingSegs = ordsets:subtract(Offsets2, Segs2), | |
MissingOffsets = ordsets:subtract(Segs2, Offsets2), | |
[missing_seg(S) || S <- MissingSegs], | |
[missing_offset(O) || O <- MissingOffsets]. | |
offset_clean(OffsetFile) -> | |
filename:basename(OffsetFile, ".offsets"). | |
seg_clean(SegFile) -> | |
filename:basename(SegFile, ".data"). | |
missing_seg(Seg) -> | |
?LOG("MISSING_SEGMENT: ~p~n", [Seg]). | |
missing_offset(Offset) -> | |
?LOG("MISSING_SEGMENT_OFFSET: ~p~n", [Offset]). | |
detect_bad_seg_offsets(Dir) -> | |
?LOG("Checking for bad offsets...~n"), | |
Offsets = file_glob(Dir, "*.offsets"), | |
[check_offset(O) || O <- Offsets]. | |
check_offset(Offset) -> | |
try | |
ets:file2tab(Offset) | |
catch _:Reason -> | |
?LOG("BAD_SEGMENT_OFFSET: ~p~n~p~n~p~n", | |
[Offset, Reason, erlang:get_stacktrace()]) | |
end. | |
detect_bad_segs(Dir) -> | |
?LOG("Checking for bad segments...~n"), | |
Segs = file_glob(Dir, "*.data"), | |
[check_seg(S) || S <- Segs]. | |
check_seg(Seg) -> | |
try | |
{ok, FileInfo} = file:read_file_info(Seg), | |
Seg2 = {segment, filename:rootname(Seg), dummy_offset_tab, FileInfo#file_info.size}, | |
Itr = mi_segment:iterator(Seg2), | |
iterate(Itr()) | |
catch _:Reason -> | |
?LOG("BAD_SEGMENT: ~p~n~p~n~p~n", | |
[Seg, Reason, erlang:get_stacktrace()]) | |
end. | |
iterate(eof) -> | |
ok; | |
iterate({_,Itr}) -> | |
iterate(Itr()). | |
file_glob(Dir, Glob) -> | |
filelib:wildcard(filename:join([Dir, Glob])). |
Can this be run while a node is up?
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My understanding, via @evanmcc (from Ryan, I think) is that you have to remove BOTH the segment.N.data file and the segment.N.offsets file if the above script points out a corrupted .data file.