result of eprof on a leo_gateway server.

gistfile1.txt

erlang:demonitor/2                                            1713   0.00      16259  [      9.49]
ets:safe_fixtable/2                                            748   0.00      17258  [     23.07]
ets:next/2                                                    2312   0.00      17622  [      7.62]
erlang:crc32/2                                                 562   0.01      19638  [     34.94]
file:file_name_1/2                                           34643   0.01      20030  [      0.58]
ets:lookup/2                                                  4359   0.01      26580  [      6.10]
erlang:monitor/2                                              4973   0.01      28380  [      5.71]
ets:select/1                                                   361   0.01      30265  [     83.84]
erlang:send/3                                                 1736   0.01      30438  [     17.53]
erlang:crc32/1                                                 842   0.01      39367  [     46.75]
erlang:port_command/2                                         1936   0.02      92923  [     48.00]
erlang:term_to_binary/1                                        842   0.03      96608  [    114.74]
ets:match_object/2                                             571   0.04     142159  [    248.96]
dcerl_api:get_chunk/2                                          513   0.08     294311  [    573.71]
dcerl_api:get/2                                             225162   0.12     468925  [      2.08]
dcerl:get/2                                                 225214   0.25     959268  [      4.26]
gen_server:decode_msg/8                                    8201787   2.51    9577735  [      1.17]
gen_server:handle_msg/5                                    8201781   2.86   10922810  [      1.33]
ecache_server:handle_call/3                                8200449   5.10   19452448  [      2.37]
erlang:setelement/3                                        8691654   7.15   27297562  [      3.14]
cherly:put/3                                                866398   8.14   31079070  [     35.87]
gen_server:loop/6                                          8201825  10.76   41065041  [      5.01]
gen_server:reply/2                                         8200747  17.49   66772261  [      8.14]
cherly:get/2                                               7333571  45.28  172850995  [     23.57]

hardware

• cpu:32core
• mem: 32GB

os

• Linux leofs09 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

erlang

• 15B03-1

leofs

• of Gateway/Storage Nodes: 1/5

• Consistency: N:3 R:1 W:2 D:2
• memory_cache_size: 16GB
• disk_cache_size: 128GB
• acceptor_pool_size: 512

basho_bench

{mode,      max}.
{concurrent, 512}.
{key_generator,   {pareto_int, 100000}}.
{value_generator, {exponential_bin, 16384, 131072} }.
{operations, [{get,9},{put,1}]}.

considering

obviously cherly:get/2 take most of the time in leo_gateway.
but IMHO, the amount of cpu time seem to be relatively reasonable.

Note

Now I'm using the hash structure based on golang's map implementation(version pre1.0).
New golang(version 1.1) map impl will be more faster(about 40%) and reduce memory space.
So I will fork it after golang1.1 will be released.

• the bellow is redundant-manager related results:

ets:safe_fixtable/2                                  748   0.00      17258  [     23.07]
ets:next/2                                          2312   0.00      17622  [      7.62]
ets:lookup/2                                        4359   0.01      26580  [      6.10]
ets:match_object/2                                   571   0.04     142159  [    248.96]