(partly supported by the EU project IES Cities http://iescities.eu/)
Packaging:
- add a libscalaris-dev[el] package with the C++ API (rpm, deb)
- Maven: let Maven also create a source jar file for the Java-API
- Maven: allow proper snapshot versions for the maven repository at
https://scalaris-team.github.io/scalaris/maven
API:
- CPP-API: provide a new C++ client library
- DataNucleus: provide a new storage back-end for Scalaris
- add a Scalaris adapter for YCSB
- new functions in all APIs for generic routing table operations
Business Logic:
- rrepair: considerably improve the set reconciliation algorithms' performance
and run more processes in parallel - rrepair: further reduce the reconciliation costs
- rrepair: re-use left-over failure probability from phase 1 for phase 2
- rrepair: increase accuracy in several formulaes of the set reconciliation
algorithms - rrepair: support creating multiple Merkle trees for fewer message rounds
(rr_merkle_num_treesconfiguration variable) - rrepair: remove support for aligning bit sizes (no improvements there)
- transactions: speed up write ops when the transaction log already contains
a read op on the same key - RM: optimise the traffic of state exchanges during ring maintenance
- RT: improve routing parallelism by handling more messages in the routing
process itself instead of inside the dht_node process - RT: improve performance along the routing path
- support for dynamic replication factors given by the
replication_factor
configuration variable - pid_groups: shuffle pids in
find_a/1for more better distributed (parallel)
requests
Infrastructure:
- pid_groups: group names are now atoms instead of strings
(allows faster access) - scalarisctl: do not set any default Erlang scheduler flags (allow changes
through theERL_SCHED_FLAGSenvironment variable) - extend the example scripts for running Scalaris on a SLURM cluster
- add SLURM scripts for running Basho Bench
- use configure to select the routing table type (
--with-rt=rt_chord) - change hanoidb detection to
configure --enable-hanoidb=<dir> - change erlang_js detection to
configure --enable-erlang-js=<dir> - dht_node_monitor: switch messages on/off via configuration variable
dht_node_monitor - msg_delay: remove extraneous error messages for trigger messages of killed
processes - prbr: allow write_filter to return value to qwrite calling process
- update yaws to version 2.0.2
- support for Erlang R14B04 up to 18.2.3 and current otp master
Tests:
- allow running single test groups via
make <test suite>:<group name>_GROUP
Tools:
- gen_component: allow processes to provide their own start functions
- trace_mpath: write whole message of log_info to the tex output
Bugs:
- fix cleanup of some special cases with transactions
- fix several math issues and increase the math functions' performance
- fix some errors which occurred in large scale deployments
- fix several warnings reported by Coverity Scan
- fix numerous more bugs