Man page - memcflush(1)

Packages contains this manual

Package:  libmemcached-tools
apt-get install libmemcached-tools

Manuals in package:
• memcexist(1)
• memccat(1)
• memcerror(1)
• memcparse(1)
• memcflush(1)
• memcdump(1)
• memcstat(1)
• memcslap(1)
• memcrm(1)
• memctouch(1)
• memcaslap(1)
• memcping(1)
• memccp(1)
• memccapable(1)
Documentations in package:
• libmemcached-tools

Manual

MEMFLUSH

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
ENVIRONMENT
NOTES
PROGRAM PREFIX
SEE ALSO

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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

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