NAME

       memflush - libmemcached Documentation

SYNOPSIS

       memflush [options]

       Reset a server or list of servers

DESCRIPTION

       memflush  resets the contents of memcached(1) servers.

       WARNING:
          This means that all data in the specified servers will be deleted.

OPTIONS

       -h|--help
              Display help.

       -V|--version
              Display version.

       -q|--quiet
              Operate quietly.

       -v|--verbose
              Operate more verbosely.

       -d|--debug
              See -v|--verbose.

       -s|--servers <list of servers>
              Specify the list of servers as hostname[:port][,hostname[:port]...].

       -n|--non-blocking
              Enable non-blocking operations.

       -N|--tcp-nodelay
              Disable Nagle's algorithm.

       -b|--binary
              Enable binary protocol.

       -B|--buffer
              Buffer requests.

       -u|--username <username>
              Use username for SASL authentication.

       -p|--password <password>
              Use password for SASL authentication.

       -e|--expire <expiration>
              Use expiration seconds (or a UNIX timestamp).

       NOTE:
          Using  an  expiration  time  (period),  all  keys,  which  have  not bean updated until
          expiration will cease to exist.

          Quoting the memcached protocol documentation, it states:
              Its effect is to invalidate all existing items immediately (by  default)  or  after
              the expiration specified.  After invalidation none of the items will be returned in
              response to a retrieval command (unless it's stored again under the same key  after
              flush_all has invalidated the items).

              The  most precise definition of what flush_all does is the following: it causes all
              items whose update time is earlier than the time at which flush_all was set  to  be
              executed to be ignored for retrieval purposes.

              The  intent  of flush_all with a delay, was that in a setting where you have a pool
              of memcached servers, and you need to flush all content, you have the option of not
              resetting all memcached servers at the same time (which could e.g. cause a spike in
              database load with all clients suddenly needing  to  recreate  content  that  would
              otherwise have been found in the memcached daemon).

ENVIRONMENT

       MEMCACHED_SERVERS
              Specify a list of servers.

NOTES

   PROGRAM PREFIX
       The prefix of this program is variable, i.e. it can be configured at build time.

       Usually  the client programs of libmemcached-awesome are prefixed with mem, like memcat or
       memcp.

       It can be configured, though, to replace the prefix with something else like mc,  in  case
       of  that,  the  client  programs of libmemcached-awesome would be called mccat, mccp, etc.
       respectively.

SEE ALSO

       memcached(1) libmemcached(3)

       • C/C++ Client Library for memcached

       • Wiping clean the contents of a server