MDCACHED(1)MDCACHED(1)NAMEmdcached - A high-performance cache daemon (Bullet Cache)
SYNOPSIS
*mdcached* -h
*mdcached* [-h] [-a] [-d] [-f file] [-i] [-k] [-m #] [-n #] [-r] [-s #] [-t #] [-v #]
DESCRIPTION
The optional argument to mdcached are:
-a
Disable runtime monitoring and adaptive reconfiguration of the
server.
-d
Enable debug mode: the server does not fork to background and
displays the log messages on the terminal.
-f
file Set dump file name (for use with prewarming or with SIGUSR1).
The server has the ability to create a dump file containing stored
data. This dump may be created by sending the SIGUSR1 signal to the
server, and it may be used to prewarm the server’s cache.
-h
Shows a help message with a short summary of available command line
arguments
-i #
Automatically create a cache dump every # seconds.
-k
Bind network threads to worker threads. This option enables a
performance optimization which may increase performance when worker
threads are enabled. The most efficient case is when the number of
worker threads equals the number of network threads.
-m #
Limits memory use to # MiB (default=0, disabled). Enabling memory
limits may hurt performance in some cases. The limits are only
enforced for the raw data stored in the memory database, and the
actual memory usage (which includes internal book-keeping data) may
be significantly higher
-n #
Set number of network threads to # (default=2). If Bullet Cache is
used on dedicated servers, the most efficient configuration is to
configure the number of network threads between 1 and 1.5 times the
number of logical CPUs in the system.
-r
Read cache data from the dump file (prewarm the cache).
-s #
Set the default record size, in bytes. Correctly specifying the
record size may result in significantly lower memory usage.
-t #
Set number of worker threads to # (default=0). Worker threads are
useful only if the number of complex data queries is larger than
the number of simple data queries. For normal workloads, worker
threads are likely to reduce the overall performance.
-v #
Sets minimum log (verbosity) level to # [0-7]. The log level
semantics (and numbering) resembles the ones used in syslog(3).
Bullet Cache is a memory database intended to be used much like
memcached, but offering much higher flexibility through use of record
tags which can be used to perform bulk operations on sets of records.
It has its own binary network protocol which is accessible through Unix
domain sockets and through TCP. It is indended to be accessed through a
high-performance C library.
This documentation is yet to be completed.
SEE ALSO
Bullet Cache has extensive documentation available at:
· http://mdcached.sourceforge.net/documentation.html
· http://goo.gl/LTrzt
Please report bugs and satisfied user reports at the SourceForge
project page (https://sourceforge.net/projects/mdcached/).
AUTHORS
Bullet Cache and its documentation was created by Ivan Voras
<ivoras@gmail.com>.
05/10/2012 MDCACHED(1)
