Version 4.1

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.