Downstream users should note that these release notes cover some changes already included in the 0.16.0 non-production release.

Incompatible Changes

• ‼️ The project's maven coordinates have changed to use group id site.ycsb and Java packages have changed to be in site.ycsb (#1340)
• ❗ Azure Document DB has been removed (#1295)
• ❗ JDBC binding now semicolon for sharding (#1233)

Known Issues

• The mongodb binding does not honor the maxPoolSize=XX parameter and instead opens a connection per client thread. (see #317)
• Mongodb binding use with AWS DocumentDB requires manually converting SSL CA format (see #1314)
• Datastore drivers that lack timeouts may result in YCSB failing to honor the maxexecutiontime parameter. (see #618)
• "Latest" distribution does not work properly on update transactions. (see #640)
• Accumulo client currently always claims success even when the record it's supposed to operate on (e.g. for a read) doesn't exist. (see #699)
• JDK 9 and JDK 10 are not supported. (see #704)
• ArangoDB client bindings fail to work with ArangoDB authentication (see #1155)
• HBase 2.0 client bindings doesn't include an slf4j logging-binding and so doesn't provide log messages from the client library (see #1173)
• The Accumulo client bindings do not work with kerberos enabled clusters (see #1211)
• Memcached update deletes all fields except the one updated (see #1358)
• Data integrity verification doesn't check the number of fields. (see #1359)
• Workload D reports read failures when used with client side batched inserts (see #1356)

Tested Datastores

Changed in this release and verified to work

• 🆕 Apache Crail (incubating) (#1266)
• Apache HBase on HDP 2.6.5 via hbase098, hbase10, hbase12, hbase14, and asynchbase bindings and CDH6 via hbase20 binding
  • add documentation for using client side buffering (#1283)
  • changed API for table checks (#1315)
  • fixed doc for skipping WAL writes (#1324)
• Apache Ignite (incubating) 2.6.0 (via ignite and ignite-sql)
  • client versoin bump (#1270)
• 🆕 Azure Cosmos DB (#1264 #1298 #1300)
  • and Azure Cosmos DB Cassandra API via the cassandra-cql binding with SSL (#1294)
• JDBC checked with MsSQL and CockroachDB 2.0.3
  • 🆕 now works with mssql (#1350)
  • adds multi-row inserts (#1220)
  • ❗ uses semicolon for sharding (#1233)
• MongoDB versions 4.2.0, 4.0.12. 3.6.14, 3.4.23, 3.2.22, 3.0.15, 2.6.12
  • added compatibility for MongoDB v4 (#1217)
• 🆕 Postgres NoSQL with Postgres 9.5 and 9.6 via the postgrenosql binding (#1242)
• 🆕 Table Store from Alibaba Cloud (#1286)
• 🆕 Toshiba GridDB (#1258)
• 🆕 VoltDB v9.1.1 via the voltdb binding (#1319)

Unchanged in this release and previously verified

• Aerospike 4.2.0.3 (via aerospike)
• Amazon S3 (via s3)

• Apache Accumulo 1.9.2 and 1.7.2-cdh5.5.0 (via accumulo1.7 and accumulo1.8)

• Apache Cassandra 3.11.2 (via cassandra-cql)
• Apache Geode 1.2.0, 1.3.0, and 1.6.0 (via geode)
• Apache Kudu 1.8.0 (via kudu)

• ArangoDB 3.3 and 3.4 (nightly) (via arangodb)

• Azure Table Storage (via azuretablestorage binding).
• Couchbase2 4.0 and 4.5 (via couchbase2 binding).
• DynamoDB using AWS SDK 1.10.48 (via dynamodb binding).

• FoundationDB 5.2.5 (via foundationdb)

• Google Cloud Datastore (via googledatastore)
• MapR 6.0.1 (via maprdb and maprjsondb)
• Riak 2.x.y (via riak binding).
• Redis 4.0.9 in non-cluster mode (via redis)
• REST (via rest binding).

• RocksDB (via rocksdb)

• Tarantool 1.6.6-249, 1.6.8, 1.7-alpha (via tarantool binding).
• YugaByte DB 1.0.0 (via cassandra-cql)

Untested Datastores

If you make use of one of these stores and can verify it works, please add a note to #1355

• Apache Accumulo versions prior to 1.7
• Apache Cassandra versions prior to 3
• Apache Solr 5 and 6

• Cloud Spanner
  • client version bump (#1293)

• Couchbase versions prior to 4
• Elastic Search

• 🆕 Elastic Search 5 REST client (#1231)
• Google Cloud Bigtable
  • client version bump (#1293)

• HyperTable
• Infinispan
• Mapkeeper

• memcached
  • work done on logic error where individual fields would not get updated (#1153)

• NoSQLDB

• OrientDB
  • client version bump (#1256)

• Rados
• Redis versions prior to 4
• Redis in cluster mode

Framework changes

• Maven Group Id changed to site.ycsb (#1340)
• Java packages changed to site.ycsb (#1340)
• Core and binding-parent artifacts now published to Maven central (#1340)
• Number of threads used by client is capped by number of operations (#1323)
• Allow configuration of field names via fieldnameprefix property (#117)
• JDK 8 or 11 should be used, we no longer test JDK9 or JDK10 (#1253)
• Improvements to some internal byte iterators (notably Strings) (#1112)
• Correct configuration of exponential distribution in the Core workloads (#1260)