v3.1

3.1 (29-04-2017)

Note: this release is now autoconf-based, you should download the tar.gz file from the files below instead of relying on github's tar for the release tag if you don't want dependencies on autoconf, automake, bison and flex for the build.

New Features

• router a new route using clause was added to match rules to
  set the string to be used as key for consistent-hash based clusters.
  Pull Request #235
• consistent-hash node traversal is now done through a binary search
  instead of forward pointer chasing.

Bugfixes

• Issue #261
  unable to use numeric instance name
• Issue #262
  DNS round-robin on any_of cluster doesn't rotate and causes lots of
  hung connections
• Issue #263
  parser fails on % in regular expressions, and exits with a crash
• Issue #264
  carbon_ch hash algorithm change between 2.6 and 3.0

v3.0

3.0 (2017-04-07)

Notes

• Parsing of the configuration file has changed implementation in this
  version. Should you find problems with configurations that worked
  fine before, please report the problem.
• The use of send statistics to is now deprecated, use the new
  statistics send to instead.
• The use of statistics controlling flags -S sending interval and -m
  summary mode, are now deprecated because they can be set in the
  configuration.

New Features

• collector statistics now can be controlled via the configuration
  file using the new statistics clause. This overrides some command
  line flags, and adds some new posibilities.
• router the rewrite rule got a new replacement mode: \. This
  mode replaces all dots with underscores in the matched group. A
  combination with upper/lowercasing is possible, e.g. \_..
• collector one can now set the internal statistics prefix
  Issue #25
  Issue #113
  Issue #249.

Bugfixes

• Issue #249
  send statistics changes metric prefix from dots into underscores

v2.6

2.6 (2017-01-26)

New Features

• router useall is now also allowed for forward and failover
  clusters
• server hostnames are now re-resolved at every connect
  Issue #115
• server when connecting to a hostname, now /all/ resolved addresses
  are tried in order before failing
• relay A new -O flag allows to set the minimum rules threshold
  before trying to optimise the rules.

Bugfixes

• Issue #246
  using stop in a match tule does not stop metrics from being
  processed afterwards
• Issue #206
  some metrics are randomly prefixed with garbage characters

v2.5

Bugfixes

• Issue #239
  segfault when date format is incorrect
• Issue #242
  dispatcher/aggregations broken (relay seems too slow)

v2.4

New Features

• router match rules now support a validate clause to do data
  filtering, Issue #228,
  Issue #142,
  Issue #121,
  Pull #127,
  Pull #87.

Bugfixes

• server connection errors are no longer endlessly repeated
• Issue #240
  'include' directive doesn't care about rewrites.
• Issue #241
  XXX characters being prepended to metrics when sent via UDP
• Issue #204
  relay is sending data randomly while kill -HUP happens

v2.3

carbon-c-relay-2.3.tar.gz

Bugfixes

• Issue #213
  Change to aggregates to not cause HUP to reload when more than 10
  aggregates are defined.
• Issue #214
  -U option doesn't set UDP receive buffer size.
• Issue #218
  zeros inserted after some metrics.
• Issue #219
  should fail if port is unavailable
• Issue #224
  segfault during SIGHUP

v2.2

carbon-c-relay-2.2.tar.gz

New Features

• relay socket receive and send buffer sizes can be adjusted
  the -U option was introduced to allow setting the socket
  buffer size in bytes, Issue #207.

Enhancements

• relay the listen backlog default got increased from 3 to 32
• server TCP_NODELAY is now set to improve small writes

Bugfixes

• Issue #188
  SIGHUP leads to SIGSEGV when config didn't change, or a SIGHUP is
  received while a previous HUP is being processed
• Issue #193
  race condition in aggregator leads to crash
• Issue #195
  assertion fails when reloading config
• Issue #200
  use after free during shutdown in aggregator
• Issue #203
  change default connection listen backlog
• Issue #208
  TCP_NODELAY should be off for connections relaying data
• Issue #199
  Various race conditions reported by TSAN

v2.1

carbon-c-relay-2.1.tar.gz

Enhancements

• router the optimiser now tries harder to form groups of
  consecutive rules that have a matching common pattern

Bugfixes

• Issue #180
  include directive possibly overrides previous included components
• Issue #184
  router optimise doesn't work correctly with regex groups