v0.9.6 (Mar 01, 2018)

Overview of changes

• Support for using Kubernetes style cnames in YugaByte CQL client natively! The sample applications can easily be run as a Kubernetes service now.
• Lots of perf fixes for running YugaByte on machines with large number of CPUs.
• Added built-in time functions such as now(), totimestamp(), tounixtimestamp() and unixtimestampof().
• Support for high-performance batch transaction codepath with intra-batch dependencies.

Key commits

• [fadfd84] Use a separate thread pool for consensus service
• [71fc829] Initialize being_compacted to false
• [db55a6f] Support Kubernetes style cname in YugaByteDB clients
• [c27f929] Correct apply of repeated keys in txn
• [8ceaeb9] Enable creating multiple outstanding pipelines per IO thread
• [699a58e] Handle intra-dependency in batch request / transaction
• [39100f4] Replace upgrade lock with shared_lock and unique_lock
• [f17b2a8] Implementing now(), totimestamp(), tounixtimestamp() and unixtimestampof() functions for YQL.
• [024730e] Use circular buffer for receive
• [c619be7] Reserve the number of subkeys from ParseCollection
• [de6a268] Handle intra-dependency in batch request / transaction
• [a26f8d2] Need to remove the special tserver service queue sizes on "low-cpu" machines.
• [3857155] Change distributed transaction test cases to test writing to the same hash / primary key in the same transaction.
• [99d4adb] Group lookup tablet requests
• [0bd8878] Set iterate_upper_bound to avoid seeking over deleted keys in RocksDB.
• [88cf84e] Introduce limits for queued commands and don't drop connection on read buffer overflow
• [2250acb] #59: Set GIT_DIR to /tmp when building AWS SDK so that it does not pick up YugaByte DB version as its own
• [b4a9b8e] Reduce log spew for unavailable peer
• [0261099] Make Redis read buffer size and number of concurrent master lookups in meta cache configurable
• [f3e9672] Gflag for block cache num shards
• [b0553d9] Porting nonredundant functionalities of local_cluster_ctl to yb-ctl.
• [dc6e2e2] Log spew during tablet startup under load.
• [4ad88df] system_redis.redis should not be counted as an user table
• [7302b1f] Correct handling of failure to retry RPC command
• [f90a83f] Fix TransactionManager destruction

0.9.5 (Feb 16, 2018)

Overview of changes

• Support for natively running YugaByte DB using Kubernetes StatefulSets! YugaByte DB now works in GKE as well.
• Distributed transactions supported at isolation level SNAPSHOT ISOLATION.
• HINCRBY support in Redis API.
• Defaults for CQL client driver switched to strong consistency.
• Lots of performance enhancements and fixes. Notably - lock free hybric clock implementation. New YugaByte perf report uploaded.
• Improved debuggability - added slow query logging for Redis.
• Overhauled the third party build system to make it more readable and easy to maintain.

Thanks

• @mchang31415 for reporting a number of perf issues.
• @praneeth-nimmagadda for reporting issues with the COUNTER datatype.
• @nickhristov for pointing out that duplicate primary keys in a batch are not getting loaded

Key commits

• [2150bee] Added AWS C++ SDK 3rd party.
• [8d8030f] Fix TransactionManager destruction
• [9546e7e] Fix counter column datatype in system_schema.columns.
• [3074f56] Allow multiple writes of the same row within a batch request.
• [8ee1288] Update 3rd party version for mac
• [cfd54dd] Periodic timers
• [2292067] Implement HIncrBy
• [7a7421f] Fix a CHECK failure due to handling of slow responses when looking for leader master
• [bed88c9] Create cloud-machine-types-analysis.md
• [90ae07b] Update yb-perf-0.9.5rc-Feb-13.md
• [ab9deaa] Set defaults for read_pool_* flags
• [eb32648] #51: Kubernetes cname only tries the first ip address on GKE (#53)
• [2dbd7e8] Update yugabyte-statefulset.yaml
• [0c87387] Fix master UI to show only running tables
• [c294304] Capture by reference to avoid copies during HMGet
• [c6d2635] High CPU usage in CleanWaitingConnections
• [d4fd22c] Print slow queries for Redis. Similar to CQL
• [6488bfd] Set GLOG flag so that we do not sync for WARNING messages
• [e230091] Fix parsing of tcmalloc max thread cache bytes.
• [54121c0] Added tests for ImportSnapshotMeta.
• [072595a] Update Cassandra Java driver versions to use default YB_STRONG consistency level.
• [c62d02a] Make HybridClock Now/Update lock-free
• [4fa3118] Parallelize reads for Redis ops in the same TabletService::Read request
• [8cd931c] Increase tcmalloc local thread cache size for tservers.
• [3ef0019] Reuse iterator for Redis Operations
• [dfb16c9] Prevent core dumps for LOG(FATAL) and CHECK.
• [07ffec9] Fix QLTabletTest.SkewedClocks and other safe time logic in MvccManager
• [58c97d3] Change YQL transaction isolation level to SNAPSHOT_ISOLATON.