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- You can now force unsatisfiable Range: requests to go to origin even when read-while-writer is in effect. This can help avoid significant latency on large objects. The setting is overloaded on the existing proxy.config.cache.enable_read_while_writer configuration.
Jira: TS-2314
traffic_line
- The option to specify configuration location, proxy.config.config_dir, is now actually implemented.
- Add option to support SO_LINGER to origin server, via proxy.config.net.sock_option_flag_out
- traffic_line -m is now using an unachored regular expression, similar to how diagnostic tracers work.
- traffic_line --backtrace will produce a stack backtrace for all running threads.
traffic_layout
A new command line utility, traffic_layout, is now available. This will show the layout and configuration option for the ATS build tree.
TLS
We continue to improve our TLS (HTTPS) features and support. Noteworthy in 5.2.x is:
- SSLv3 is is now disabled by default!
- Dynamic TLS record size tuning. According to to Ilya, this makes us the first server that is all Green.
- Add forward secrecy support with DHE.
- Add Add ssl_pre_handshake hook hook for better plugin access to SSL handling.
- Improved session cache, for better performance and scalability.
- New configuration for OpenSSL session cache, proxy.config.ssl.session_cache.auto_clear.
Jira: TS-3153, TS-2503, TS-2417, TS-2956, TS-3080, TS-3127
traffic_line
- traffic_line -m is now using an unachored regular expression, similar to how diagnostic tracers work.
- traffic_line --backtrace will produce a stack backtrace for all running threads.
traffic_layout
A new command line utility, traffic_layout, is now available. This will show the layout and configuration option for the ATS build tree.
Jira: TS-3041
traffic_via
This is a new command line tool, to parse and decipher the Via: header that Traffic Server can produce. This is useful for debugging e.g. cache results etc.
Jira: TS-3149
traffic_crashlog
This is the helper application around the new crash logging feature. For more information, see the documentation.
Jira: TS-3195
Plugin Improvements
The following plugins have new features and improvements.
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