swift/etc/memcache.conf-sample
Tim Burke aff65242ff memcache: Make error-limiting values configurable
Previously these were all hardcoded; let operators tweak them as needed.
Significantly, this also allows operators to disable error-limiting
entirely, which may be a useful protection in case proxies are
configured with a single memcached server.

Use error_suppression_limit and error_suppression_interval to mirror the
option names used by the proxy-server to ratelimit backend Swift
servers.

Co-Authored-By: Alistair Coles <alistairncoles@gmail.com>
Change-Id: Ife005cb8545dd966d7b0e34e5496a0354c003881
2020-11-05 23:37:24 +00:00

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[memcache]
# You can use this single conf file instead of having memcache_servers set in
# several other conf files under [filter:cache] for example. You can specify
# multiple servers separated with commas, as in: 10.1.2.3:11211,10.1.2.4:11211
# (IPv6 addresses must follow rfc3986 section-3.2.2, i.e. [::1]:11211)
# memcache_servers = 127.0.0.1:11211
#
# Sets how memcache values are serialized and deserialized:
# 0 = older, insecure pickle serialization
# 1 = json serialization but pickles can still be read (still insecure)
# 2 = json serialization only (secure and the default)
# To avoid an instant full cache flush, existing installations should
# upgrade with 0, then set to 1 and reload, then after some time (24 hours)
# set to 2 and reload.
# In the future, the ability to use pickle serialization will be removed.
# memcache_serialization_support = 2
#
# Sets the maximum number of connections to each memcached server per worker
# memcache_max_connections = 2
#
# Timeout for connection
# connect_timeout = 0.3
# Timeout for pooled connection
# pool_timeout = 1.0
# number of servers to retry on failures getting a pooled connection
# tries = 3
# Timeout for read and writes
# io_timeout = 2.0
#
# How long without an error before a server's error count is reset. This will
# also be how long before a server is reenabled after suppression is triggered.
# Set to 0 to disable error-limiting.
# error_suppression_interval = 60.0
#
# How many errors can accumulate before a server is temporarily ignored.
# error_suppression_limit = 10