3.3.3.6 libmemcached Command-Line Utilities

In addition to the main C library interface, libmemcached also includes a number of command-line utilities that can be useful when working with and debugging memcached applications.

All of the command-line tools accept a number of arguments, the most critical of which is servers, which specifies the list of servers to connect to when returning information.

The main tools are:

  • memcat: Display the value for each ID given on the command line:

    shell> memcat --servers=localhost hwkey
    Hello world
  • memcp: Copy the contents of a file into the cache, using the file name as the key:

    shell> echo "Hello World" > hwkey
    shell> memcp --servers=localhost hwkey
    shell> memcat --servers=localhost hwkey
    Hello world
  • memrm: Remove an item from the cache:

    shell> memcat --servers=localhost hwkey
    Hello world
    shell> memrm --servers=localhost hwkey
    shell> memcat --servers=localhost hwkey
  • memslap: Test the load on one or more memcached servers, simulating get/set and multiple client operations. For example, you can simulate the load of 100 clients performing get operations:

    shell> memslap --servers=localhost --concurrency=100 --flush --test=get
    memslap --servers=localhost --concurrency=100 --flush --test=get	Threads connecting to servers 100
    	Took 13.571 seconds to read data
  • memflush: Flush (empty) the contents of the memcached cache.

    shell> memflush --servers=localhost

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