| stress |
| ====== |
| |
| Description |
| ----------- |
| stress is a tool for benchmarking and load testing a Cassandra |
| cluster. It is significantly faster than the older py_stress tool. |
| |
| Setup |
| ----- |
| Run `ant` from the Cassandra source directory, then Run `ant` from the |
| contrib/stress directory. |
| |
| Usage |
| ----- |
| There are three different modes of operation: |
| |
| * inserting (loading test data) |
| * reading |
| * range slicing (only works with the OrderPreservingPartioner) |
| * indexed range slicing (works with RandomParitioner on indexed ColumnFamilies) |
| |
| Important options: |
| -o or --operation: |
| Sets the operation mode, one of 'insert', 'read', 'rangeslice', or 'indexedrangeslice' |
| -n or --num-keys: |
| the number of rows to insert/read/slice; defaults to one million |
| -d or --nodes: |
| the node(s) to perform the test against. For multiple nodes, supply a |
| comma-separated list without spaces, ex: cassandra1,cassandra2,cassandra3 |
| -y or --family-type: |
| Sets the ColumnFamily type. One of 'Standard' or 'Super'. If using super, |
| you probably want to set the -u option also. |
| -c or --columns: |
| the number of columns per row, defaults to 5 |
| -u or --supercolumns: |
| use the number of supercolumns specified NOTE: you must set the -y |
| option appropriately, or this option has no effect. |
| -g or --get-range-slice-count: |
| This is only used for the rangeslice operation and will *NOT* work with |
| the RandomPartioner. You must set the OrderPreservingPartioner in your |
| storage-conf.xml (note that you will need to wipe all existing data |
| when switching partioners.) This option sets the number of rows to |
| slice at a time and defaults to 1000. |
| -r or --random: |
| Only used for reads. By default, stress.py will perform reads on rows |
| with a guassian distribution, which will cause some repeats. Setting |
| this option makes the reads completely random instead. |
| -i or --progress-interval: |
| The interval, in seconds, at which progress will be output. |
| |
| Remember that you must perform inserts before performing reads or range slices. |
| |
| Examples |
| -------- |
| |
| * contrib/stress/bin/stress -d 192.168.1.101 # 1M inserts to given host |
| * contrib/stress/bin/stress -d 192.168.1.101 -o read # 1M reads |
| * contrib/stress/bin/stress -d 192.168.1.101,192.168.1.102 -n 10000000 # 10M inserts spread across two nodes |
