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cmdline.ggo
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package "mutilate"
version "0.1"
usage "mutilate -s server[:port] [options]"
description "\"High-performance\" memcached benchmarking tool"
args "-c cc --show-required -C --default-optional -l"
option "verbose" v "Verbosity. Repeat for more verbose." multiple
option "quiet" - "Disable log messages."
text "\nBasic options:"
option "server" s "Memcached server hostname[:port]. \
Repeat to specify multiple servers." string multiple
option "binary" - "Use binary memcached protocol instead of ASCII."
option "qps" q "Target aggregate QPS. 0 = peak QPS." int default="0"
option "time" t "Maximum time to run (seconds)." int default="5"
option "keysize" K "Length of memcached keys (distribution)."
string default="30"
option "valuesize" V "Length of memcached values (distribution)."
string default="200"
option "getcount" G "Number of gets in multiget (distribution)."
string default="1"
option "records" r "Number of memcached records to use. \
If multiple memcached servers are given, this number is divided \
by the number of servers." int default="10000"
option "update" u "Ratio of set:get commands." float default="0.0"
text "\nAdvanced options:"
option "username" U "Username to use for SASL authentication." string
option "password" P "Password to use for SASL authentication." string
option "threads" T "Number of threads to spawn." int default="1"
option "affinity" - "Set CPU affinity for threads, round-robin"
option "connections" c "Connections to establish per server." int default="1"
option "numreqperconn" n "Number of requests per connection (distribution). \
Once a connection reaches this number, it is torn down and re-started. \
This option facilitates experiments involving ongoing opening and closing \
of connections to the memcached server; it is passed to all agents and \
ignored on the master which takes samples. Default behaviour is to use the \
same connection for all requests." string default="0"
option "depth" d "Maximum depth to pipeline requests. Agents may locally \
override this setting." int default="1"
option "roundrobin" R "Assign threads to servers in round-robin fashion. \
By default, each thread connects to every server."
option "iadist" i "Inter-arrival distribution (distribution). Note: \
The distribution will automatically be adjusted to match the QPS given \
by --qps." string default="exponential"
option "skip" S "Skip transmissions if previous requests are late. This \
harms the long-term QPS average, but reduces spikes in QPS after \
long latency requests."
option "moderate" - "Enforce a minimum delay of ~1/lambda between requests."
option "noload" - "Skip database loading."
option "loadonly" - "Load database and then exit."
option "blocking" B "Use blocking epoll(). May increase latency."
option "no_nodelay" - "Don't use TCP_NODELAY."
option "warmup" w "Warmup time before starting measurement." int
option "wait" W "Time to wait after startup to start measurement." int
option "save" - "Record latency samples to given file." string
option "search" - "Search for the QPS where N-order statistic < Xus. \
(i.e. --search 95:1000 means find the QPS where 95% of requests are \
faster than 1000us)." string typestr="N:X"
option "scan" - "Scan latency across QPS rates from min to max."
string typestr="min:max:step"
option "report-stats" - "Report statistics every interval seconds. By default, \
report at the end of the benchmark." float typestr="interval"
option "qps-function" - "Adjust the target QPS during the benchmark according \
to the given function." string
option "qps-warmup" - "Warmup at given rate or rate QPS_function(t=0) for the \
given number of seconds." string typestr="time[:rate]"
option "stop-latency" - "Stop scanning when N-order statistic > Xus. \
(i.e. --stop-latency 95:1000 means stop scanning when 95% of requests are \
slower than 1000us)." string typestr="N:X"
option "scan-search" - "Scan latency and search for the QPS. (i.e. \
--scan-search 95:1000,20:10:100,500:50 means scan from 20KQPS to 100KQPS in
10KQPS steps and then in 500KQPS steps while 95% of requests are faster than
1000us, then go back one step, and do 50KPQS steps)." string
option "src-port" - "A list of IP source ports to use in order to achieve \
desired RSS queue distribution." string multiple
option "popularity" - "Key popularity distribution." string default="uniform"
text "\nAgent-mode options:"
option "agentmode" A "Run client in agent mode."
option "agent" a "Enlist remote agent." string typestr="host" multiple
option "agent_port" p "Agent port." string default="5556"
option "lambda_mul" l "Lambda multiplier. Increases share of \
QPS for this client." int default="1"
option "measure_connections" C "Master client connections per server, \
overrides --connections." int
option "measure_qps" Q "Explicitly set master client QPS, \
spread across threads and connections." int
option "measure_depth" D "Set master client connection depth." int
text "\nDPDK options:"
option "my-mac" - "The MAC address of the agent." string
option "my-ip" - "The IP address of the agent." string
option "server-mac" - "The MAC address of the server." string
option "cpu-core" - "The CPU core to run the agent on." int
text "
The --measure_* options aid in taking latency measurements of the
memcached server without incurring significant client-side queuing
delay. --measure_connections allows the master to override the
--connections option. --measure_depth allows the master to operate as
an \"open-loop\" client while other agents continue as a regular
closed-loop clients. --measure_qps lets you modulate the QPS the
master queries at independent of other clients. This theoretically
normalizes the baseline queuing delay you expect to see across a wide
range of --qps values.
"
text "
Some options take a 'distribution' as an argument.
Distributions are specified by <distribution>[:<param1>[,...]].
Parameters are not required. The following distributions are supported:
[fixed:]<value> Always generates <value>.
uniform:<max> Uniform distribution between 0 and <max>.
normal:<mean>,<sd> Normal distribution.
exponential:<lambda> Exponential distribution.
pareto:<loc>,<scale>,<shape> Generalized Pareto distribution.
gev:<loc>,<scale>,<shape> Generalized Extreme Value distribution.
To recreate the Facebook \"ETC\" request stream from [1], the
following hard-coded distributions are also provided:
fb_value = a hard-coded discrete and GPareto PDF of value sizes
fb_key = \"gev:30.7984,8.20449,0.078688\", key-size distribution
fb_ia = \"pareto:0.0,16.0292,0.154971\", inter-arrival time dist.
[1] Berk Atikoglu et al., Workload Analysis of a Large-Scale Key-Value Store,
SIGMETRICS 2012
"
text "
The following QPS functions are supported:
triangle:min:max:period:maxhold Triangle wave.
qtriangle:min:max:period:step Quantized triangle wave.
sin_noise:min:max:period:namp:nupdate Sine wave plus noise.
"
text "
The following popularity distributions are supported:
uniform Uniform distribution.
zipf:<theta> Zipf distribution.
"