112 lines
4.8 KiB
Plaintext
112 lines
4.8 KiB
Plaintext
package "mutilate"
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version "0.1"
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usage "mutilate -s server[:port] [options]"
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description "\"High-performance\" memcached benchmarking tool"
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args "-c cc --show-required -C --default-optional -l"
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option "verbose" v "Verbosity. Repeat for more verbose." multiple
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option "quiet" - "Disable log messages."
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text "\nBasic options:"
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option "server" s "Memcached server hostname[:port]. \
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Repeat to specify multiple servers." string multiple
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option "binary" - "Use binary memcached protocol instead of ASCII."
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option "qps" q "Target aggregate QPS. 0 = peak QPS." int default="0"
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option "time" t "Maximum time to run (seconds)." int default="5"
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option "keysize" K "Length of memcached keys (distribution)."
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string default="30"
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option "valuesize" V "Length of memcached values (distribution)."
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string default="200"
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option "records" r "Number of memcached records to use. \
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If multiple memcached servers are given, this number is divided \
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by the number of servers." int default="10000"
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option "update" u "Ratio of set:get commands." float default="0.0"
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text "\nAdvanced options:"
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option "username" U "Username to use for SASL authentication." string
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option "password" P "Password to use for SASL authentication." string
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option "threads" T "Number of threads to spawn." int default="1"
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option "affinity" - "Set CPU affinity for threads, round-robin"
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option "connections" c "Connections to establish per server." int default="1"
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option "depth" d "Maximum depth to pipeline requests." int default="1"
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option "roundrobin" R "Assign threads to servers in round-robin fashion. \
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By default, each thread connects to every server."
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option "iadist" i "Inter-arrival distribution (distribution). Note: \
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The distribution will automatically be adjusted to match the QPS given \
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by --qps." string default="exponential"
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option "skip" S "Skip transmissions if previous requests are late. This \
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harms the long-term QPS average, but reduces spikes in QPS after \
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long latency requests."
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option "moderate" - "Enforce a minimum delay of ~1/lambda between requests."
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option "noload" - "Skip database loading."
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option "loadonly" - "Load database and then exit."
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option "blocking" B "Use blocking epoll(). May increase latency."
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option "no_nodelay" - "Don't use TCP_NODELAY."
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option "warmup" w "Warmup time before starting measurement." int
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option "wait" W "Time to wait after startup to start measurement." int
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option "save" - "Record latency samples to given file." string
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option "search" - "Search for the QPS where N-order statistic < Xus. \
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(i.e. --search 95:1000 means find the QPS where 95% of requests are \
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faster than 1000us)." string typestr="N:X"
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option "scan" - "Scan latency across QPS rates from min to max."
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string typestr="min:max:step"
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text "\nAgent-mode options:"
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option "agentmode" A "Run client in agent mode."
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option "agent" a "Enlist remote agent." string typestr="host" multiple
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option "agent_port" p "Agent port." string default="5556"
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option "lambda_mul" l "Lambda multiplier. Increases share of \
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QPS for this client." int default="1"
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option "measure_connections" C "Master client connections per server, \
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overrides --connections." int
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option "measure_qps" Q "Explicitly set master client QPS, \
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spread across threads and connections." int
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option "measure_depth" D "Set master client connection depth." int
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text "
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The --measure_* options aid in taking latency measurements of the
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memcached server without incurring significant client-side queuing
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delay. --measure_connections allows the master to override the
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--connections option. --measure_depth allows the master to operate as
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an \"open-loop\" client while other agents continue as a regular
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closed-loop clients. --measure_qps lets you modulate the QPS the
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master queries at independent of other clients. This theoretically
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normalizes the baseline queuing delay you expect to see across a wide
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range of --qps values.
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"
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text "
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Some options take a 'distribution' as an argument.
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Distributions are specified by <distribution>[:<param1>[,...]].
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Parameters are not required. The following distributions are supported:
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[fixed:]<value> Always generates <value>.
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uniform:<max> Uniform distribution between 0 and <max>.
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normal:<mean>,<sd> Normal distribution.
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exponential:<lambda> Exponential distribution.
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pareto:<loc>,<scale>,<shape> Generalized Pareto distribution.
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gev:<loc>,<scale>,<shape> Generalized Extreme Value distribution.
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To recreate the Facebook \"ETC\" request stream from [1], the
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following hard-coded distributions are also provided:
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fb_value = a hard-coded discrete and GPareto PDF of value sizes
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fb_key = \"gev:30.7984,8.20449,0.078688\", key-size distribution
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fb_ia = \"pareto:0.0,16.0292,0.154971\", inter-arrival time dist.
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[1] Berk Atikoglu et al., Workload Analysis of a Large-Scale Key-Value Store,
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SIGMETRICS 2012
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"
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