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wippiest of wips.

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compiles and mostly should be done, but needs sanity checking and some
adjustment to how it's collecting stats, as dstat is junk and it'd be
better I guess to get the stats directly?
This commit is contained in:
evan 2014-04-08 17:26:37 -07:00
parent 9c5df565f5
commit ecd9173ec1
7 changed files with 672 additions and 78 deletions
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46
INSTALL
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@ -1,8 +1,44 @@
to get the reporting stuff working, you'll need to have gnuplot
installed on your local machine, at at least version 4.6.3. If
you need to install from source, you'll need at least these two
deps:
sudo apt-get install libgd2-xpm-dev libreadline6-dev
- to get the reporting stuff working, you'll need to have gnuplot
installed on your local machine, at at least version 4.6.3. If you
need to install from source, you'll need at least these two deps:
- sudo apt-get install libgd2-xpm-dev libreadline6-dev
- symlink the stuff in perf/reporting to ~/bin/, assuming that is on
your path.
- drop_caches.sh needs to be visible on the remote machine. the
initial version of these scripts assumes that everyone is on the
same filer. This isn't going to be true everywhere. drop is meant
to contain your username, and be in /etc/sudoers.d/.
- ssh needs to be setup so that the user doesn't need to provide
credentials. The current way is that I just generated a bos-local
key and use that. This isn't a terrible idea, but should at least
be automated on setup.
- ~/.riak_test.config should have a harness entry like this:
{rtperf,
[
{rt_deps, ["/usr/local/basho/evan/riak2.0/deps"]},
%% should be really long to allow full bitcasks to
%% come up
{rt_max_wait_time, 600000000000000},
{basho_bench, "/usr/local/basho/evan/basho_bench/"},
{basho_bench_statedir, "/tmp/bb_seqstate/"},
{rt_retry_delay, 500},
{rt_harness, rtperf},
{load_intercepts, false},
{perf_builds, "/usr/local/basho/evan/"},
{perf_loadgens, ["localhost", "r2s24"]},
{rtdev_path, []}
]}.
at least right now. this will problably change as the configuration
stuff gets sorted out. some of these may not be necessary.
rt_max_wait_time is (could maybe be set to infinity? maybe by the
harness?), perf_* and basho_bench* are also critical. rt_deps
should maybe be dynamic?

217
perf/consistent_get_put.erl Normal file
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@ -0,0 +1,217 @@
-module(consistent_get_put).
-compile(export_all).
-include_lib("eunit/include/eunit.hrl").
-define(HARNESS, (rt_config:get(rt_harness))).
confirm() ->
HostList = rt_config:get(rt_hostnames),
Count = length(HostList),
rtperf:standard_config(Count),
ok = build_cluster(Config),
%%[Node | _] = Nodes,
%%rt:create_and_activate_bucket_type(Node, <<"sc">>, [{consistent, true}]),
ok = rtperf:maybe_prepop(Hosts),
%% this should also get moved into the perf harness.
%% this needs to be broken apart and abstracted so it's easy to
%% specify what needs to happen. also need to add baseline load
%% vs. test load.
Test =
case rt_config:get(perf_config, undefined) of
undefined ->
case rt_config:get(perf_test_type, undefined) of
undefined ->
error("no run config or runtype defined");
pareto ->
do_pareto;
uniform ->
do_uniform
end
end,
%% this also
Collectors = rtperf:start_data_collectors(HostList),
%% need to come up with a better naming scheme, for sure
TestName = rtperf:test_name(),
rtperf:Test(HostList, BinSize, TestName),
ok = rtperf:stop_data_collectors(Collectors),
ok = rtperf:collect_test_data(HostList, TestName).
code_paths() ->
{code_paths, ["evan/basho_bench/deps/riakc",
"evan/basho_bench/deps/riak_pb",
"evan/basho_bench/deps/protobuffs"]}.
do_prepop(NodeList, BinSize, TestName) ->
PrepopCount = rt_config:get(perf_prepop_size),
Config = prepop_config(BinSize, NodeList, PrepopCount),
lager:info("Config ~p", [Config]),
rt_bench:bench(Config, NodeList, TestName),
lager:info("Prepop complete").
prepop_config(BinSize, NodeList, BinCount0) ->
Count = length(NodeList),
{Mode, _Duration} = get_md(BinSize),
BinCount = adjust_count(BinCount0, 30*Count),
lager:info("Starting prepop run for ~p binaries of size ~p bytes",
[BinCount, BinSize]),
[Mode,
%% run to completion
{duration, infinity},
{concurrent, 30*Count},
{rng_seed, now},
{riakc_pb_bucket, <<"b1">>},
%%{riakc_pb_bucket, {<<"sc">>, <<"b1">>}},
{key_generator, {int_to_bin, {partitioned_sequential_int, 0, BinCount}}},
{value_generator, valgen(BinSize)},
{operations, operations(prepop)},
{sequential_int_state_dir, rt_bench:seq_state_dir()},
%% should add asis when it's supported by the driver.
{riakc_pb_ips, NodeList},
{riakc_pb_replies, default},
{driver, basho_bench_driver_riakc_pb},
code_paths()].
adjust_count(Count, Concurrency) ->
case Count rem Concurrency of
0 -> Count;
N -> Count + (Concurrency - N)
end.
do_pareto(NodeList, BinSize, TestName) ->
Config = pareto_config(BinSize, NodeList),
lager:info("Config ~p", [Config]),
rt_bench:bench(Config, NodeList, TestName, 2).
pareto_config(BinSize, NodeList) ->
Count = length(NodeList),
{Mode, Duration} = get_md(BinSize),
[Mode,
{duration, Duration},
{concurrent, 30*Count},
{rng_seed, now},
{riakc_pb_bucket, <<"b1">>},
{key_generator, {int_to_bin, {truncated_pareto_int, 10000000}}},
{value_generator, valgen(BinSize)},
{operations, operations(pareto)}, %% update - 50% get, 50% put
%% should add asis when it's supported by the driver.
{riakc_pb_ips, NodeList},
{riakc_pb_replies, default},
{driver, basho_bench_driver_riakc_pb},
code_paths()].
do_uniform(NodeList, BinSize, TestName) ->
Config = uniform_config(BinSize, NodeList),
lager:info("Config ~p", [Config]),
rt_bench:bench(Config, NodeList, TestName, 2).
uniform_config(BinSize, NodeList) ->
Count = length(NodeList),
{Mode, Duration} = get_md(BinSize),
Numkeys =
case rt_config:get(perf_prepop_size) of
Count when is_integer(Count) ->
Count;
_ -> 10000000
end,
[Mode,
{duration, Duration},
{concurrent, 40*Count},
{rng_seed, now},
{riakc_pb_bucket, <<"b1">>},
%%{riakc_pb_bucket, {<<"sc">>, <<"b1">>}},
{key_generator, {int_to_bin, {uniform_int, Numkeys}}},
{value_generator, valgen(BinSize)},
{operations, operations(uniform)},
%% should add asis when it's supported by the driver.
{riakc_pb_ips, NodeList},
{riakc_pb_replies, default},
{driver, basho_bench_driver_riakc_pb},
code_paths()].
get_md(BinSize) ->
case rt_config:get(rt_backend, undefined) of
%% hueristically determined nonsense, need a real model
riak_kv_eleveldb_backend ->
lager:info("leveldb"),
Rate =
case BinSize >= 10000 of
true -> maybe_override(50);
false -> maybe_override(75)
end,
{{mode, {rate, Rate}}, maybe_override(150)};
_ ->
%%fixme yo
lager:info("unset or bitcask"),
{{mode, max}, maybe_override(90)}
end.
maybe_override(Default) ->
case rt_config:get(perf_runtime, undefined) of
N when is_integer(N) ->
N;
_ ->
Default
end.
date_string() ->
{YrMoDay, HrMinSec} = calendar:local_time(),
string:join(lists:map(fun erlang:integer_to_list/1,
tuple_to_list(YrMoDay)++tuple_to_list(HrMinSec)),
"-").
valgen(BinSize) ->
Type = rt_config:get(perf_bin_type),
case Type of
fixed ->
{fixed_bin, BinSize};
exponential ->
Quarter = BinSize div 4,
{exponential_bin, Quarter, Quarter*3}
end.
operations(Type) ->
LoadType = rt_config:get(perf_load_type),
N =
case LoadType of
read_heavy -> 4;
write_heavy -> 1
end,
case Type of
prepop ->
[{put, 1}];
pareto ->
[{get, N*3}, {update, 4}];
uniform ->
[{get, N*3}, {update, 1}]
end.

34
perf/get_put.erl Normal file
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@ -0,0 +1,34 @@
-module(get_put).
-compile(export_all).
-include_lib("eunit/include/eunit.hrl").
-define(HARNESS, (rt_config:get(rt_harness))).
confirm() ->
HostList = rt_config:get(rt_hostnames),
Count = length(HostList),
BinSize = rt_config:get(perf_binsize),
Config = rtperf:standard_config(Count),
ok = build_cluster(Config),
SetSize = rtperf:target_size(rt_config:get(perf_target_pct),
BinSize,
rt_config:get(perf_ram_size),
Count),
TestConfig =
rt_bench:config(
max,
rt_config:get(perf_duration),
HostList,
{int_to_bin_bigendian, {uniform_int, SetSize}},
rt_bench:valgen(rt_config:get(perf_bin_type), BinSize),
%% 4:1 get/put
[{get, 3}, {update, 1}]
),
ok = rtperf:maybe_prepop(HostList, BinSize, SetSize),
ok = rtperf:run_test(HostList, TestConfig, []),
pass.

0
tests/perf_run.erl → perf/perf_run.erl
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8
src/rt.erl
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@ -939,12 +939,14 @@ members_according_to(Node) ->
Members = riak_core_ring:all_members(Ring),
Members.
%% @doc Return an appropriate ringsize for the node count passed in
%% @doc Return an appropriate ringsize for the node count passed
%% in. 24 is the number of cores on the bigger intel machines, but this
%% may be too large for the single-chip machines.
nearest_ringsize(Count) ->
nearest_ringsize(Count * 10, 2).
nearest_ringsize(Count * 24, 2).
nearest_ringsize(Count, Power) ->
case Count < trunc(Power * 1.5) of
case Count < trunc(Power * 0.9) of
true ->
Power;
false ->

129
src/rt_bench.erl
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@ -2,16 +2,7 @@
-compile(export_all).
-include_lib("eunit/include/eunit.hrl").
clear_seq_state_dir() ->
StateDir = rt_config:get(basho_bench_statedir),
case file:list_dir(StateDir) of
{ok, FL} ->
[file:delete(StateDir++F) || F <- FL],
file:del_dir(StateDir);
{error, enoent} -> ok;
{error, Reason} -> error(Reason)
end.
-define(ESCRIPT, rt_config:get(basho_bench_escript)).
seq_state_dir() ->
rt_config:get(basho_bench_statedir).
@ -20,6 +11,9 @@ bench(Config, NodeList, TestName) ->
bench(Config, NodeList, TestName, 1).
bench(Config, NodeList, TestName, Runners) ->
bench(Config, NodeList, TestName, Runners, false).
bench(Config, NodeList, TestName, Runners, Drop) ->
lager:info("Starting basho_bench run"),
LoadGens =
@ -28,24 +22,31 @@ bench(Config, NodeList, TestName, Runners) ->
LG -> LG
end,
case rt_config:get(perf_drop_cache, true) of
case Drop of
true ->
[begin
Fun = fun(Node) ->
R = rtssh:ssh_cmd(Node, "sudo ~/bin/drop_caches.sh"),
lager:info("Dropped cache for node: ~p ~p",
lager:info("Dropped cache for node: ~p ret: ~p",
[Node, R])
end
|| Node <- NodeList];
_ ->
ok
end,
rt:pmap(Fun, NodeList);
_ -> ok
end,
%% make a local config file, to be copied to a remote
%% loadgen. They're named separately because for simplicity, we
%% use network operations even for local load generation
%% remote tempdir name
BBTmp = "/tmp/basho_bench_tmp"++os:getpid(),
BBTmpStage = BBTmp ++ "_stage",
file:make_dir(BBTmpStage), %% removed error checking here
Path = BBTmpStage++"/"++TestName++"-rt.config",
RemPath = BBTmp++"/"++TestName++"-rt.config",
[file:write_file(Path,io_lib:fwrite("~p.\n",[C]),
%% local staging version
BBTmpStage = BBTmp ++ "_stage/",
ok = file:ensure_dir(BBTmpStage),
Filename = TestName++"-rt.config",
ConfigPath = BBTmpStage++"/"++Filename,
RemotePath = BBTmp++"/"++Filename,
[file:write_file(ConfigPath,io_lib:fwrite("~p.\n",[C]),
[append])
|| C <- Config],
BBDir = rt_config:get(basho_bench),
@ -56,50 +57,84 @@ bench(Config, NodeList, TestName, Runners) ->
end
|| C <- lists:seq(1, Runners)],
F =
fun({LG, N}, Owner) ->
F = fun({LG, N}, Owner) ->
try
Num = integer_to_list(N),
{0, _} = rtssh:ssh_cmd(LG, "mkdir -p "++BBTmp),
%% don't care if we fail here
rtssh:ssh_cmd(LG, "rm -r /tmp/bb_seqstate/"),
rtssh:scp(LG, Path, BBTmp),
Cmd = "/usr/local/basho/erlang/R16B02/bin/escript "++
%% don't care much if we fail here
rtssh:ssh_cmd(LG, "rm -r " ++ seq_state_dir()),
{0, _} = rtssh:scp(LG, ConfigPath, BBTmp),
%% run basho bench on the remote loadgen,
%% specifying the remote testdir and the newly
%% copied remote config location
Cmd = ?ESCRIPT++
BBDir++"basho_bench -d "++
BBDir++"/"++TestName++"_"++Num++" "++RemPath,
BBDir++"/"++TestName++"_"++Num++" "++RemotePath,
lager:info("Spawning remote basho_bench w/ ~p on ~p",
[Cmd, LG]),
{0, R} = rtssh:ssh_cmd(LG, Cmd, false),
lager:info("ssh done returned ~p", [R]),
lager:info("bench run finished, returned ~p", [R]),
{0, _} = rtssh:ssh_cmd(LG, "rm -r "++BBTmp++"/")
catch
Class:Error ->
lager:error("basho_bench died with error ~p:~p",
[Class, Error])
after
lager:info("finishing bb run")
lager:info("finished bb run")
end,
Owner ! done
end,
S = self(),
[begin
spawn(fun() -> F(R, S) end)
end
|| R <- GenList],
[receive done -> ok end || _ <- lists:seq(1,Runners)],
lager:info("removing stage dir"),
[spawn(fun() -> F(R, S) end)|| R <- GenList],
[receive done -> ok end || _ <- GenList],
lager:debug("removing stage dir"),
{ok, FL} = file:list_dir(BBTmpStage),
[file:delete(BBTmpStage++File) || File <- FL],
file:del_dir(BBTmpStage).
ok = file:del_dir(BBTmpStage).
discard_bb_output(Port) ->
receive
{Port, {data, _Bytes}} ->
%%lager:info("bb ~p", [Bytes]),
discard_bb_output(Port);
{Port, {exit_status, 0}} ->
ok;
{Port, {exit_status, Status}} ->
throw({bb_error, Status})
-define(CONCURRENCY_FACTOR, rt_config:get(basho_bench_concurrency, 30)).
config(Rate, Duration, NodeList, KeyGen,
ValGen, Operations) ->
config(Rate, Duration, NodeList, KeyGen,
ValGen, Operations,
<<"testbucket">>, riakc_pb).
config(Rate, Duration, NodeList, KeyGen,
ValGen, Operations, Bucket, Driver) ->
DriverBucket = append_atoms(Driver, '_bucket'),
DriverIps = append_atoms(Driver, '_ips'),
DriverReplies = append_atoms(Driver, '_replies'),
DriverName = append_atoms(basho_bench_driver_, Driver),
[
Rate,
{duration, Duration},
{concurrent, ?CONCURRENCY_FACTOR * length(NodeList)},
{rng_seed, now},
{DriverBucket, Bucket},
{key_generator, KeyGen},
{value_generator, ValGen},
{operations, Operations},
%% just leave this in in case we need it, it's harmless when not
%% using the sequential generator
{sequential_int_state_dir, seq_state_dir()},
{DriverIps, NodeList},
{DriverReplies, default},
{driver, DriverName},
rt_config:get(basho_bench_code_paths)
].
append_atoms(L, R) ->
list_to_atom(atom_to_list(L)++atom_to_list(R)).
valgen(Type, BinSize) ->
case Type of
fixed ->
{fixed_bin, BinSize};
exponential ->
Quarter = BinSize div 4,
{exponential_bin, Quarter, Quarter*3}
end.

270
src/rtperf.erl Normal file
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@ -0,0 +1,270 @@
-module(rtperf).
-compile(export_all).
run_test(HostList, TestBenchConfig, BaseBenchConfig) ->
Collectors = start_data_collectors(HostList),
TestName = test_name(),
Base = maybe_start_base_load(BaseBenchConfig),
rt_bench:bench(TestBenchConfig, HostList, TestName,
rt_config:get(perf_loadgens)),
maybe_stop_base_load(Base),
ok = stop_data_collectors(Collectors),
ok = collect_test_data(HostList, TestName).
build_cluster(Config) ->
Vsn = rt_config:get(perf_version),
HostList = rt_config:get(rt_hostnames),
Count = length(HostList),
%% make sure that all of the remote nodes have a clean build at
%% the remote location
Force = rt_config:get(perf_force_build, false),
case rt_config:get(perf_restart, meh) of
true ->
case rtssh:ensure_remote_build(HostList, Vsn, Force) of
ok -> ok;
Else ->
lager:error("Got unexpected return ~p from deploy, stopping",
[Else]),
error(deploy_error)
end;
_ -> ok
end,
Nodes =
case rt_config:get(perf_restart) of
true ->
rt:build_cluster(Count,
lists:duplicate(Count, {Vsn, Config}),
whatever);
false ->
[list_to_atom("riak@" ++ Host) || Host <- HostList]
end,
Me = self(),
spawn(fun() ->
ok = rt:wait_until_nodes_ready(Nodes),
ok = rt:wait_until_ring_converged(Nodes),
ok = rt:wait_until_transfers_complete(Nodes),
Me ! done
end),
receive
done -> ok
after timer:minutes(10) ->
lager:error("Cluster setup is taking too long, stopping"),
error(cluster_setup_timeout)
end.
start_data_collectors(Hosts) ->
%% should probably only start this once?
inets:start(),
OSPid = os:getpid(),
PrepDir = "/tmp/perf-"++OSPid,
file:make_dir(PrepDir),
Cmd = "python ./bin/dstat -cdngyimrs --vm --fs --socket --tcp --disk-util "++
"--output "++"/tmp/dstat-"++os:getpid(),
file:write(PrepDir++"/START", io_lib:format("~w.~n", [calendar:local_time()])),
[spawn(rtssh, ssh_cmd, [Host, Cmd]) || Host <- Hosts] ++
[spawn(?MODULE, poll_stats, [Host]) || Host <- Hosts].
poll_stats(Host) ->
case httpc:request("http://"++Host++":8098/stats/") of
{ok, {{_Version, 200, _ReasonPhrase}, _Headers, Body}} ->
Stats = mochijson2:decode(Body),
OSPid = os:getpid(),
PrepDir = "/tmp/perf-"++OSPid,
{ok, Fd} = file:open(PrepDir++"/rstats-"++Host, [append]),
file:write(Fd, io_lib:format("~w.~n", [calendar:local_time()])),
file:write(Fd, io_lib:format("~p.~n", [Stats])),
file:close(Fd),
timer:sleep(60000);
_Else ->
%% good to know, but turns out that this is just annoying
%%lager:error("Web stat collector failed with: ~p", [Else]),
timer:sleep(100)
end,
poll_stats(Host).
stop_data_collectors(Collectors) ->
[C ! stop || C <- Collectors].
maybe_start_base_load([]) ->
none.
maybe_stop_base_load(none) ->
ok.
%% need more sensible test names.
test_name() ->
Vsn = rt_config:get(perf_version),
BinSize = rt_config:get(perf_binsize),
rt_config:get(perf_test_name)++"-"++Vsn++"-"++
atom_to_list(rt_config:get(perf_test_type))++"-"++
atom_to_list(rt_config:get(perf_bin_type))++"-"++
integer_to_list(BinSize)++"b-"++date_string().
collect_test_data(Hosts, TestName) ->
%% stop the dstat watching processes
[rtssh:ssh_cmd(Host, "killall python") %% potentially unsafe
|| Host <- Hosts],
%% collect the files
OSPid = os:getpid(),
PrepDir = "/tmp/perf-"++OSPid,
file:write_file(PrepDir++"/END",
io_lib:format("~w~n", [calendar:local_time()])),
%% get rid of this hateful crap
[begin
rtssh:cmd("scp -q "++Host++":/tmp/dstat-"++OSPid++" "
++PrepDir++"/dstat-"++Host),
rtssh:ssh_cmd(Host, "rm /tmp/dstat-"++OSPid)
end || Host <- Hosts],
ok = rt_bench:collect_bench_data(PrepDir),
%% grab all the benchmark stuff. need L to make real files because
%% it's a soft link
BBDir = rt_config:get(basho_bench),
rtssh:cmd("cp -aL "++BBDir++"/"++TestName++"/current_. "++PrepDir),
rt:cmd("mv "++PrepDir++" results/"++TestName),
%% really, really need to compress the results so they don't take
%% up os damn much space
ok.
maybe_prepop(Hosts, BinSize, SetSize) ->
Vsn = rt_config:get(perf_version),
case rt_config:get(perf_prepop) of
true ->
PPids = start_data_collectors(Hosts),
PrepopName = rt_config:get(perf_test_name)++"-"++Vsn++
"-prepop"++integer_to_list(BinSize)++"b-"++date_string(),
PrepopConfig =
rt_bench:config(
max,
rt_config:get(perf_runtime),
Hosts,
{int_to_bin_bigendian, {uniform_int, SetSize}},
rt_bench:valgen(rt_config:get(perf_bin_type), BinSize),
[{put,1}]),
rt_bench:bench(PrepopConfig, Hosts, PrepopName,
rt_config:get(perf_loadgens)),
timer:sleep(timer:minutes(1)+timer:seconds(30)),
[exit(P, kill) || P <- PPids],
collect_test_data(Hosts, PrepopName);
false ->
ok
end.
date_string() ->
{Mega, Sec, _Micro} = os:timestamp(),
integer_to_list((Mega * 1000000) + Sec).
%% in the end, it'd be nice to automatically generate some of the
%% other config stuff as well, i.e. give a node count, some
%% information (RAM, fast or slow disks, etc.) and generate a config
%% that should more or less hit the same performance contours
%% regardless of what machines are being used. I suspect that
%% data-set sizing here is what's important, the ratio of disk cache
%% to data set size.
%% this actually suggests an entirely different line of testing than
%% what's been pursued so far, running a test at say, 50% ram usage,
%% 150%, 200% etc. Then we could skip the time-consuming and not
%% terribly enlightening up-from-cold period.
standard_config(NodeCount) ->
standard_config(NodeCount, off).
standard_config(NodeCount, AAE) ->
Backend = rt_config:get(rt_backend, undefined),
Fish = rt_config:get(cuttle, true),
RingSize = rt:nearest_ringsize(NodeCount),
mk_std_conf(Backend, Fish, RingSize, AAE).
mk_std_conf(riak_kv_memory_backend, false, Ring, AAE) ->
[{riak_core,
[{ring_creation_size, Ring*2},
{handoff_concurrency, 16}]},
{riak_kv, [{storage_backend, riak_kv_memory_backend},
{anti_entropy,{AAE, []}},
{memory_backend, []},
{fsm_limit, 50000}
]}
];
mk_std_conf(riak_kv_memory_backend, true, Ring, AAE0) ->
AAE = aae_cuttle(AAE0),
{cuttlefish,
[{ring_size, Ring*2},
{handoff_concurrency, 16},
{"erlang.distribution_buffer_size", "128MB"},
{storage_backend, memory},
{anti_entropy, AAE}
]};
mk_std_conf(riak_kv_eleveldb_backend, false, Ring, AAE) ->
[{riak_core,
[{ring_creation_size, Ring}]},
{riak_kv,
[{storage_backend, riak_kv_eleveldb_backend},
{anti_entropy,{AAE,[]}},
{fsm_limit, undefined}]},
{eleveldb,
[{max_open_files, 500}]}
];
mk_std_conf(riak_kv_eleveldb_backend, true, Ring, AAE0) ->
AAE = aae_cuttle(AAE0),
{cuttlefish,
[{ring_size, Ring},
{"erlang.distribution_buffer_size", "128MB"},
{storage_backend, leveldb},
{anti_entropy, AAE}
]};
mk_std_conf(_, false, Ring, AAE) ->
[{riak_core,
[{ring_creation_size, Ring}]},
{riak_kv,
[{anti_entropy,{AAE, []}}]}
];
mk_std_conf(_, true, Ring, AAE0) ->
AAE = aae_cuttle(AAE0),
{cuttlefish,
[{ring_size, Ring},
{"storage_backend", "bitcask"},
{"erlang.distribution_buffer_size", "128MB"},
{"bitcask.io_mode", nif},
{anti_entropy, AAE}]}.
aae_cuttle(off) ->
passive;
aae_cuttle(on) ->
active.
target_size(Percentage, BinSize, RamSize, NodeCount) ->
TotalRam = RamSize * NodeCount,
CacheTarget = trunc((Percentage/100)*TotalRam),
BinPlus = (BinSize + 300) * 3,
%% hacky way of rounding up to the nearest 10k
trunc((CacheTarget/(BinPlus*10000))+1)*10000.