Created
March 20, 2014 15:52
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escript bitcask hintcheck
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#!/usr/bin/env escript -f | |
%% -*- erlang -*- | |
-define(OFFSETFIELD, 64). | |
-define(TSTAMPFIELD, 32). | |
-define(KEYSIZEFIELD, 16). | |
-define(TOTALSIZEFIELD, 32). | |
-define(HINTHEADSIZE, 18). %%(?TSTAMPFIELD + ?KEYSIZEFIELD + ?TOTALSIZEFIELD + ?OFFSETFIELD)/8 | |
%% Please export ERL_LIBS=<riak>/lib where riak is probably /usr/lib/riak for package installs | |
%% Note: this script is designed for Riak 0.14.2 on Debian/Ubuntu | |
main([Root]) -> | |
case file:list_dir(filename:absname(Root)) of | |
{ok, VnodeDirs} -> | |
[ check_bitcask(filename:absname(Dir, Root)) || Dir <- VnodeDirs]; | |
{error, Reason} -> | |
io:format("Couldn't list dir ~s: ~w~n", [Root, Reason]), | |
halt(1) | |
end; | |
main(_) -> | |
usage(). | |
check_bitcask(Dir) -> | |
io:format("== Checking Bitcask Directory ~s ==~n", [Dir]), | |
case file:list_dir(Dir) of | |
{ok, Files} -> | |
[ scan(filename:absname(F, Dir)) || F <- Files, | |
filename:extension(F) =:= ".hint"]; | |
{error, Reason} -> | |
io:format("\tCouldn't list dir ~s: ~w~n", [Dir, Reason]) | |
end. | |
usage() -> | |
io:format("usage: bitcaskhintcheck <bitcask-data-root>\n"), | |
halt(1). | |
key(<<>>) -> "Hintfile CRC"; | |
key(B) -> | |
case catch binary_to_term(B) of | |
K={_,_} -> K; | |
_ -> "Error decoding key" | |
end. | |
read_hint(Fd) -> | |
case file:read(Fd,?HINTHEADSIZE) of | |
{ok, | |
<<Tstamp:?TSTAMPFIELD/integer, | |
KeySz:?KEYSIZEFIELD/integer, | |
_TotalSz:?TOTALSIZEFIELD/integer, | |
Offset:?OFFSETFIELD/integer>> | |
} -> | |
case file:read(Fd,KeySz) of | |
{ok, Key} -> | |
io:format("Key: ~p Timestamp: ~p Offset: ~b~n",[key(Key),Tstamp,Offset]); | |
eof -> {error, eof}; | |
{error, Reason} -> {error, Reason}; | |
O -> {error, {unexpected, O}} | |
end; | |
eof -> {error, eof}; | |
{error, Reason} -> {error, Reason}; | |
O -> {error, {unexpected, O}} | |
end. | |
scan(Filename) when is_list(Filename) -> | |
{ok, F} = file:open(Filename,[read,raw,binary]), | |
read_all(F,start). | |
read_all(_Fd,{error,Reason}) -> | |
io:format("Stopping due to {error,~p}~n",[Reason]); | |
read_all(_Fd,eof) -> | |
io:format("Done~n"); | |
read_all(Fd,_) -> | |
read_all(Fd,read_hint(Fd)). |
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