NEWS.md

flux-core version 0.8.0 - 2017-08-23

Fixes

• libflux: remove calls to functions that exit on error (#1060)
• fix flux_reactor_run() to return active watcher count (#1085)
• fix flux path detection when install path contains symlinks (#1122)
• lua: fix refcount bug in kvs bindings (#1116)
• kvs: oom() fixes (#1124, #1128)
• kvs: Fix forced dirty bit clear error (#1133)
• kvs: fix invalid memory read (#1065)
• kvs: directory walk return error fixes (#1058)
• kvs_classic: fix kvs(dir)_put_double (#1114)
• fix memory leaks detected by valgrind (#1076)
• avoid deadlock when unloading connector-local module (#1027)
• fix several arm7l portability issues (#1023)
• optparse: test and allow adjustment of posixly-correct behavior (#1049)
• Small improvements for systemd unit file and install paths (#1037)
• fix small leak in flux cmd driver (#1067)

New Features

• add FLUX_MSGFLAG_PRIVATE and allow guests to content load/store (#1032)
• allow guests to access hwloc topology (#1043)
• libflux: new flux_future_t API (#1083)
• libflux: implement RPCs in terms of futures (#1089)
• kvs: implement transaction objects (#1107)
• connector-local: Fix compiler warning (#1031)
• add optional initial program timeout, for test scripts (#1129)
• libutil: new dirwalk interface (#1072, #1061, #1059)
• connector-local: add exponential backoff to connect retry count (#1148)
• support tbon.endpoint and mcast.endpoint attributes (#1030)
• content: allow hash type to be configured (#1051)

Cleanup

• update many broker attribute names (#1042)
• consolidate installed libraries and source tree cleanup (#1095)
• convert broker from json-c to jansson (#1050)
• libflux: rename jansson pack/unpack-based Flux API functions (#1104)
• kvs: various code cleanup (#1057, #1073, #1079, #1099, #1119, #1123, #1153)
• kvs: refactor kvs commit, lookup, and walk logic (#1066, #1105)
• kvs: drop unused, legacy and deprecated functions (#1100, #1116)
• kvs: switch from json-c to jansson (#1108, #1153)
• Misc Cleanup/Minor Fixes from KVS TreeObject Work (#1152)
• cron: avoid use of json-c and xzmalloc (#1143)
• Change void * to void ** in flux_msg_get_payload (#1144)
• python: make bindings compatible with newer versions of pylint (#1113)
• barrier: cleanup (#1092)
• tweak watcher structure, add external watcher construction interface (#1082)
• drop coprocess programming model (#1081)
• split flux_mrpc() out to its own class (#1080)
• deprecate some libutil classes (#1047)
• cleanup of flux_msg_copy(), flux_rpc_aux_set() etc. (#1056)

Testing

• update sharness version to upstream 1.0.0 version (#1035)
• cleanup kvs tests (#1149)
• mitigate slow builds in Travis-CI (#1142)
• fix --chain-lint option in sharness tests (#1125)
• t2000-wreck.t: fix intermittent failures (#1102, #1109)
• kvs: Add json_util unit tests (#1106)
• run valgrind if available as part of make check (#1076, #1098)
• add FLUX_PMI_SINGLETON env variable to avoid SLURMs libpmi in valgrind test (#1091)
• other test improvements (#1087)
• update soak test for recent flux changes (#1072)
• test/security: Fix test corner case (#1029)

Documentation

• add missing manpages, minor manpage fixes (#1045)
• improve reactor documentation (#1086)
• Code comments and documentation cleanup (#1138)

flux-core version 0.7.0 - 2017-04-01

Fixes

• Improve reliability of module unloading (#1017)
• Update autotools for make dist to support newer arches (#1016)
• Fix corner cases in resource-hwloc module (#1012)
• Ensure destructors are called during broker shutdown (#1005)
• flux-logger(1) and flux_log(3) can return error (#1000)
• Fix balancing of Caliper hooks in RPC calls (#991)
• Fix missed errors in subscribe/unsubscribe on local connector (#994)
• sanitize log entries before they enter circular buffer (#959)
• Do not send wreck.state.complete event before job archival (#955)
• Update embedded libev to 4.24 (#944)
• Propagate argument quoting properly in flux-start and flux-broker (#931)
• Fixes and improvements in liboptparse (#922, #927, #929)
• Tighten up PMI implementation for OpenMPI (#926)

New Features

• Allow user other than instance owner to connect to an instance (#980)
• Systemd support, default run directory and URI for system instance (#992, #995)
• New --bootstrap option to flux-start (#990)
• New KVS_NO_MERGE flag in kvs commit and fence operations (#982)
• Add broker.pid to broker attributes (#954)
• flux start only execs broker if --size is not specified (#951)
• Add pkg-config package for Flux PMI (#921)

Cleanup

• Remove live module (#1003)
• Remove flux-up and flux-topo (#960)
• Transition away from deprecated czmq classes (#1013)
• Re-architect and improve many internal and cmd rpc functions (#1002, #1009)
• Other major and minor cleanup (#919, #928, #941, #940, #942, #954, #969, #976, #981, #978, #986, #990, #1001, #1008)
• Remove cmb. prefix from broker services (#947)

Testing

• Expand and improve unit and system tests for greater code coverage (#937, #942, #979, #985, #991, #1004, #1011, #1013, #1014)
• Fix documentation spellcheck (#1015)
• Add dependency on "all" to top-level make check (#970)
• Add flake8/pylint checks (#816)

Documentation

• Improve flux_reactor_create documentation (#970)
• Update flux_msg_cmp(3) and flux_recv(3) to match flux_match changes (#946)
• Update flux-submit(1) and flux-wreckrun(1) manpages (#945)

flux-core version 0.6.0 - 2016-11-29

Fixes

• Fixes for ATS testsuite compatibility (#914)
• python: install kz bindings file (#895)
• broker: adjust errno response to "upstream" request on rank 0 (#913)
• Fix for possible unconstrained memory growth in modules/libjsc (#891)
• Fix error message on flux-help failure (#887)
• Issue fatal error in wrexecd for invalid tasks on node (#901)
• Fix barrier protocol incompatability with older jansson versions (#889)

New Features

• Add a flux content service API (#903)
• Enhance option parsing library for thread safety and new features (#908, #910, #911)
• Add flux_rpcf_multi() (#909)
• Add new "any" and "upstream" nodeset options (#909)
• Add HostName key in resource-hwloc by_rank directory to allow easy resolution of rank to hostname in a flux session (#892)
• Add -d option to flux-kvs dir, dirat, and watchdir to restrict output to key only. (#896)

Cleanup

• flux-ping refactor and cleanup (#898, #904)
• Check expected size of json_int_t during configure (#902)
• Other various cleanup, refactoring and testing updates.

flux-core version 0.5.0 - 2016-10-27

• barrier module cleanup and debug logging (#885)
• Various minor cleanup and documentation updates (#886)
• use jansson >= 2.6 and document JSON payload functions (#884)
• fix MANPATH for Ubuntu, and tidy up travis dep builder (#877)
• fixes for minor issues detected by Coverity (#876)
• build: add --disable-docs configure option (#871)
• kvs: allow get_double to be called on an int (#872)
• README.md: Update srun instructions (#867)
• misc minor fixes (#862)
• make flux_msg_t a bonafide type, add jansson payload accessors (#857)
• Fix --rank issues, add NODESET documentation, and minor cleanup (#860)
• Fix output errors with flux up --comma & --newline, add appropriate tests (#858)
• Add hierarchical lwj directory support in kvs (#811)
• doc/man1/flux-start.adoc: Fix example option usage (#852)
• add dlopen RTLD_DEEPBIND flag (#849)
• src/broker/broker.c: Fix typo flux_repond -> flux_respond (#851)
• doc/man1/flux-module.adoc: Fix environment variable error (#850)
• Pull in json-c, allowing internals to link against alternate json libraries. (#835)
• Add enhanced flux_rpc functions using libjansson json_pack/unpack functions
• Update flux_t * references in man pages (#844)
• Remove pointer from typedef flux_t (#841)
• Remove JSON typedef, just use json_object * (#832)
• module: Remove pointer from typedef flux_modlist_t (#831)
• security: Remove pointer from typedef flux_sec_t (#830)
• and related functions (#824)
• experimental aggregator module (#787)
• kvs: testing, fix use-after-free, streamline python bindings (#823)
• Fix #821: crash in kvs due to NULL arg in Jget_str() (#822)
• python: add a check for invalid handle types (#819)
• Python json and constant rework (#799)
• Python destructor refactoring and exception safety (#807)
• libutil/veb: quiet uninitialized variable warning in vebnew (#809)
• when tagpool is exhausted, grow up to RFC 6 limits (#806)
• add KVS blobref access functions (#801)
• Fix missing error checks in Lua bindings, flux-wreckrun, flux-wreck (#804)
• python: Several fixes for the bindings (#794)
• Switch lua scripts to use lua interpreter in PATH (#789)
• restructure kvs commit handling code for correctness (#788)
• broker/hello: fix leak/error detection in flux_rpc (#786)
• implement scalable reduction for wireup protocol (#781)
• wreck: minor enhancements for scale testing (#782)
• increase KVS commit window (#780)
• autogen.sh: run libtoolize before autoreconf (#771)
• clean up LOG_INFO output, log wireup, rc1, rc3 times, add pmi timing. (#769)
• optparse: remove requirement for option key on long-only options (and other fixes) (#768)

Testing

• add test to verify KVS int can be read as double (#878)
• travis-ci: minor updates (#865)
• jsc test: Add timed waits to avoid races (#859)
• t/t0005-exec.t: Fix corner case in test for file not found (#848)
• Fix make distcheck (#847)
• t/t2000-wreck.t: Fix invalid compare on per-task affinity test (#837)
• t/t2000-wreck.t: Fix invalid compare on 'wreckrun: --input=0 works' test (#836)
• travis.yml: Fix ANCHOR definition (#767)

flux-core version 0.4.1 - 2016-08-12

• python kvs_watch() fix (#759)

• include man7 in distribution (#762)

flux-core version 0.4.0 - 2016-08-11

Scalability improvements

• don't store broken-down hwloc topology in the KVS (#716)

• route rank-addressed requests via TBON (#689)

• streamline matchtag handling (#687)

• keep active jobs in a separate KVS namespace from "archived" jobs (#609)

New features

• implement PMI-1 simple server in wrexecd (#706)

• add skeletal PMI-2 library (based on PMI-1) (#747)

• make libflux-optparse.so available externally (#702)

• asynchronous KVS fence and rewritten fence path in KVS module (#707, #729)

• flux-cron, a cron/at-like service (#626)

• flux-proxy and ssh:// connector (#645)

Other changes

• Use RFC 5424 log format for internal logging, not ad hoc JSON (#691)

• Add wreck lua.d MPI personalities (#669, #743, #747)

• Improved command line for launching flux from slurm/flux (#658)

• Assorted code cleanup.

• Automatic github release upload on tags (#744)

Deprecations

• Sophia content backing store module (#727)

• mrpc KVS based muti-RPC interface (#689)

• ZPL config file (#674)

• Ring overlay network (#689)

Testing

• Print backtraces for any core files generated in travis-ci (#703)

• Add cppcheck target to travis-ci (#701)

• configure --enable-sanitizer for AddressSanitizer, ThreadSanitizer (#694)

• caliper based profiling (#741)

• coverage uploaded to CodeCof (#751)

• improved test coverage

flux-core version 0.3.0 - 2016-04-26

• Add support for launching Intel MPI, OpenMPI using PMIv1. Use the broker circular log buffer for PMI tracing.

• Add flux wreck timing subcommand which prints time from

  • STARTING: reserved->starting
  • RUNNING: starting->running
  • COMPLETE: running->complete
  • TOTAL: starting->complete

• Add three "run levels" for Flux jobs:

  1. run rc1 script on rank 0 to load modules, etc.
  2. run the user's initial program
  3. run rc3 script on rank 0 to unload modules, etc.

• Add module status reporting via keepalive messages. flux module list now reports live module status:

  • I = intializing
  • S = sleeping
  • X = exited
  • R = running
  • F = finalizing

• Conform to RFC 3 change that requires all JSON payloads to use objects as the outermost JSON type (no bare arrays for example).

• Add flux nodeset utility so scripts can manipulate nodesets.

• Make flux env output suitable for use in bash/zsh eval.

• Drop flux module --direct option. Module load/unload/list is now always direct between flux-module and broker(s). Drop the modctl module for distributed module control.

• When a module fails before entering its reactor loop, propagate the error back to flux module load so the user knows the load was not successful.

• Address memory leaks and adjust KVS usage to ameliorate increasing broker memory footprint and degrading job throughput when running many small jobs back to back. Active jobs are now stored under lwj-active to avoid creating excessive versions of the larger lwj directory as job state is accumulated.

• Bug fixes to live (TBON self-healing) module. The module is no longer loaded by default, pending additional work. flux up will always report all ranks up when live is not loaded.

• Send keepalives on the ring network and log idle peers on TBON and ring at LOG_CRIT level, where "idle" means no messages in >= 3 heartbeats.

• Compress large content-sqlite blobs with lzo to reduce disk utilization.

• KVS improvements:

  • kvs_put() follows intermediate symlinks
  • KVS operations bundled within one commit are applied in order
  • add kvs_copy() and kvs_move() utility functions.

• Configuration is loaded into broker attribute config namespace rather than KVS, and is no longer inherited from the enclosing instance.

• flux command driver usability improvements.

• Flux API improvements including dropping deprecated functions and fine tuning some function signatures (users should recompile).

• Build system allows --with-tcmalloc, --with-jemalloc, and tcmalloc heap profiling.

• Fine tuning of log levels and messages.

• Documentation improvements.

• Test suite improvements/fixes.

flux-core version 0.2.0 - 2016-02-16

• Avoid putting the Flux libpmi.so in the system ld.so path on systems where Flux is installed to the default system prefix, as this could interfere with MPI runtimes under other resource managers.

• Enable the SQLite backing store for the KVS by default, which addresses unchecked memory growth in the rank 0 broker.

• Stability and usability improvements to the flux-hwloc subcommand, and resource-hwloc comms module.

• Added the flux-version subcommand.

• Build system fixes.

• Test suite fixes.

flux-core version 0.1.0 - 2016-01-27

Initial release for build testing only.