Version 4.1

List of versions
Version 4.10 Version 4.9 Version 4.8 Version 4.7 Version 4.6 Version 4.5 Version 4.4 Version 4.3 Version 4.2 Version 4.1 Version 4.0

Changes

Released on Saturday, September 01, 2007.

Build system: The build system has been changed to automatically disable all plugins, which are missing dependencies. The dependency checking has been removed from the plugins themselves to remove redundancy.
Flexible interval: The interval of collected data is now sent along with the data itself over the network, so that the interval-settings of server and clients no longer needs to match.
Netlink plugin: The new `netlink' plugin connects to the Linux kernel using a netlink socket and uses it to query information about interfaces, qdiscs and classes.
RRDtool plugin: The cache is now dumped to disk in an extra thread to not block data collection.
SNMP plugin: The new `snmp' plugin can read values from SNMP enabled network devices, such as switches, routers, thermometers, rack monitoring servers, etc. The collectd-snmp(5) manpage documents this plugin.
UnixSock plugin: Added the `LISTVAL' command.
XMMS plugin: The new `xmms' plugin graphs the bitrate and frequency of music played with xmms.

Released on Wednesday, September 12, 2007.

Build system: The detection of `libnetlink' has been improved.
collectd: The documentation has been fixed in numerous places.
Exec plugin: Setting the group under which to run a program has been fixed.
collectd: The `sstrerror' function was improved to work correctly with the broken GNU version of `strerror_r'.
collectd: Write an error message to STDERR when loading of a plugin fails.
APC UPS plugin: Fix the `types' used to submit the values: They still has an `apcups_' prefix which doesn't work anymore.
RRDtool plugin: Create new RRD-files with the `begin' time set to whatever the client thinks is `now'..

Released on Friday, September 28, 2007.

APC UPS plugin: Fix reporting of the `load percent' data.
Wireless plugin: Correct the handling of cards returning signal and noise quality as percentage.
Perl plugin: Fix a possible buffer overflow in get_module_name().
build system: Further improve the detection of libraries.
Netlink plugin: Build issues under some older versions of the Linux includes (i. e. Debian Sarge) have been fixed.
SNMP plugin: Fix a potential segfault when a host times out. Add support for the `timeticks' type.

Released on Wednesday, October 24, 2007.

collectd: A build issue under Solaris has been resolved by renaming data types.
RRDtool plugin: Use the thread-safe RRD-library if available. Try to be more thread-safe otherwise by locking calls to the library.

Released on Thursday, November 08, 2007.

Build system: Improve detection of the rrd library, especially if it's in a non-standard location.
Build system: A bug when parsing the argument for `--with-libnetsnmp' has been fixed.
collectd: Implement `strerror_r' if the libc doesn't provide it.
RRDtool plugin: Fix a bug in the shutdown sequence that might cause a deadlock or delay when shutting down the daemon.
SNMP plugin: Fix a memory leak.

Released on Thursday, December 27, 2007.

RRDtool plugin: Fix a memory leak that only occurred in very-low- memory situations.
Sensors plugin: Updated the plugin to build and work with version 3 of the libsensors library.

Released on Friday, January 11, 2008.

UnixSock plugin: A bug in the unixsock plugin caused it not to set the permission on the socket as documented in the manpage. Thanks to Evgeny Chukreev for fixing this issue.
collectd: The documentation has been improved.