1MEMFLUSH(1)                  libmemcached-awesome                  MEMFLUSH(1)
2
3
4

NAME

6       memflush - libmemcached Documentation
7

SYNOPSIS

9       memflush [options]
10
11       Reset a server or list of servers
12

DESCRIPTION

14       memflush  resets the contents of memcached(1) servers.
15
16       WARNING:
17          This means that all data in the specified servers will be deleted.
18

OPTIONS

20       --help Display help.
21
22       --version
23              Display version.
24
25       --quiet
26              Operate quietly.
27
28       --verbose
29              Operate more verbosely.
30
31       --debug
32              See --verbose.
33
34       --servers <list of servers>
35              Specify   the   list   of   servers   as  hostname[:port][,host‐
36              name[:port]...].
37
38       --binary
39              Enable binary protocol.
40
41       --username <username>
42              Use username for SASL authentication.
43
44       --password <password>
45              Use password for SASL authentication.
46
47       --expire <expiration>
48              Use expiration seconds (or a UNIX timestamp).
49
50       NOTE:
51          Using an expiration time (period), all keys, which have not bean up‐
52          dated until expiration will cease to exist.
53
54          Quoting the memcached protocol documentation, it states:
55              Its  effect  is to invalidate all existing items immediately (by
56              default) or after the expiration specified.  After  invalidation
57              none  of  the  items will be returned in response to a retrieval
58              command (unless it's stored  again  under  the  same  key  after
59              flush_all has invalidated the items).
60
61              The  most  precise definition of what flush_all does is the fol‐
62              lowing: it causes all items whose update time  is  earlier  than
63              the time at which flush_all was set to be executed to be ignored
64              for retrieval purposes.
65
66              The intent of flush_all with a delay,  was  that  in  a  setting
67              where  you  have  a  pool  of memcached servers, and you need to
68              flush all content, you have the option of not resetting all mem‐
69              cached  servers at the same time (which could e.g. cause a spike
70              in database load with all clients suddenly needing  to  recreate
71              content  that  would  otherwise have been found in the memcached
72              daemon).
73

ENVIRONMENT

75       MEMCACHED_SERVERS
76              Specify the list of servers.
77

SEE ALSO

79       memcached(1) libmemcached(3)
80
81       • /libmemcached
82
83       • /libmemcached/memcached_flush
84
85
86
87
881.1                              Feb 02, 2022                      MEMFLUSH(1)