WiredTiger 11.2.0 release

See JIRA changelog for a full listing of tickets included in WiredTiger 11.2.0 release.

WiredTiger 11.1.0 release

See JIRA changelog for a full listing of tickets included in WiredTiger 11.1.0 release.

WiredTiger 11.0.0 release

See the upgrading documentation for details of API and behavior changes.

See JIRA changelog for a full listing.

WiredTiger 10.0.0 release

See the upgrading documentation for details of API and behavior changes.

Significant changes:

• WT-4008 Add ARM NEON support for row search operations
• WT-5083 Add mips64el support
• WT-6598 Add new API allowing changing dhandle hash bucket size
• WT-4427 Make WiredTiger timestamps always on and 8 bytes
• WT-4642 Store transaction IDs durably
• WT-5225 Create persistent file for History store
• WT-5500 Implement new history store format
• WT-6677 Map read committed/uncommitted isolation to read-only transaction
• WT-6710 Change default transaction isolation to snapshot
• WT-4833 Drop support for Python2
• WT-6410 Remove WT_SESSION.rebalance
• WT-6528 Remove offensive terminology in WiredTiger API and source code
• WT-6674 Remove Async API code and documentation
• WT-6675 Remove WiredTiger Java language API and documentation
• WT-6678 Remove Huffman Encoding support for Keys
• WT-6713 Remove transaction support from custom data sources
• WT-7295 Compatibility with older versions of WT

See JIRA changelog for a full listing:
https://jira.mongodb.org/projects/WT/versions/24082

WiredTiger 3.2.1 release

See the upgrading documentation for details of API and behavior changes.

Significant changes:

• WT-3968 Use compression ratio to tune page sizes
• WT-4156 Add a new salvage API option to wiredtiger_open
• WT-4192 Remove support for raw compression in WiredTiger
• WT-4426 Change WiredTiger data format to optionally include timestamps in cells
• WT-4447 Add a quota like system to manage I/O per subsystem
• WT-4494 Support import of of standalone WiredTiger files
• WT-4670 Remove support for LevelDB APIs in WiredTiger
• WT-4765 Remove support for Helium/Levyx data sources in WiredTiger
• WT-4803 Implement file_max configuration for Cache Overflow mechanism
• WT-4913 Fix the Windows CRC32 on blocks that aren't 8B aligned and/or multiples of 8B

See JIRA changelog for a full listing:
https://jira.mongodb.org/projects/WT/versions/21117
https://jira.mongodb.org/projects/WT/versions/22515

WiredTiger 3.2.0 release

See the upgrading documentation for details of API and behavior changes.

Significant changes:

• WT-3968 Use compression ratio to tune page sizes
• WT-4156 Add a new salvage API option to wiredtiger_open
• WT-4192 Remove support for raw compression in WiredTiger
• WT-4426 Change WiredTiger data format to optionally include timestamps in cells
• WT-4447 Add a quota like system to manage I/O per subsystem
• WT-4670 Remove support for LevelDB APIs in WiredTiger
• WT-4765 Remove support for Helium/Levyx data sources in WiredTiger

See JIRA changelog for a full listing:
https://jira.mongodb.org/projects/WT/versions/21117

WiredTiger 3.1.0 release

See the upgrading documentation for details of API and behavior changes.

See JIRA changelog for a full listing:
https://jira.mongodb.org/projects/WT/versions/19708

WiredTiger 3.0.0 release

See the upgrading documentation for details of API and behavior changes.

Significant changes:

JIRA reference	Brief description
WT-3039	Change the log file format to record a previous LSN record
WT-3181	Add support for application defined transaction IDs via a mechanism called timestamps.
WT-3310	Add support to WT_SESSION::alter to change table log setting
WT-3389	Restructure page split code to hold a split generation for the entire operation.
WT-3406	Fix a bug in reconciliation so that it ignores concurrent updates.
WT-3418	Fix a block manager race in tree close/open
WT-3435	Improvements to the cache overflow mechanism aka lookaside
WT-3437	Improvements to auto tuning of number of eviction workers
WT-3440	Add a log record when starting a checkpoint.
WT-3461	Avoid hangs when system clocks move backwards by using CLOCK_MONOTONIC for pthread_cond_timedwait if possible.
WT-3490	Fix a bug in WT_CURSOR.modify unaligned size_t access.
WT-3495	Fix a bug so we don't ftruncate if log cursors are open
WT-3497	Improve logging message when hitting the configured session limits
WT-3537	Split pages in memory when nothing can be written
WT-3556	Remove wtstats support
WT-3681	Change recovery so that it doesn't truncate the last log file
WT-3683	Allow eviction of clean pages with history when cache is stuck
WT-3710	Get a page-level lock to ensure page splits are single threaded
WT-3752	Allow trimming of obsolete modify updates.

See JIRA changelog for a full listing:
https://jira.mongodb.org/projects/WT/versions/18401

WiredTiger 2.9.3 release

See the upgrading documentation for details of API and behavior changes.

Significant changes:

JIRA reference	Brief description
WT-2972	Add an interface allowing partial updates to existing values
WT-3063	Add an interface allowing reservation of records for read-modify-write
WT-3142	Add a workload generator application
WT-3160	Improve eviction of internal pages from idle trees
WT-3245	Avoid hangs on shutdown when a utility thread encounters an error
WT-3258	Improve visibility into thread wait time due to pages exceeding memory_page_max
WT-3263	Allow archive on restart/recovery if clean shutdown
WT-3287	Review WiredTiger internal panic checks
WT-3292	Review/cleanup full-barrier calls in WiredTiger
WT-3296	LAS table fixes/improvements
WT-3327	Checkpoints can hang if time runs backward
WT-3345	Improve rwlock scaling
WT-3373	Access violation due to a bug in internal page splitting
WT-3379	Change when pages can be split to avoid excessively slowing some operations

See JIRA changelog for a full listing:
https://jira.mongodb.org/browse/WT/fixforversion/18291

WiredTiger 2.9.2 release

See the upgrading documentation for details of API and behavior changes.

Significant changes:

JIRA reference	Brief description
SERVER-16796	Increase logging activity for journal recovery operations
SERVER-28168	Cannot start or repair MongoDB after unexpected shutdown
SERVER-28194	Fix a bug where a missing WiredTiger.turtle file can result in data loss
WT-98	Update the current cursor value without a search
WT-2439	Enhance reconciliation page layout
WT-2898	Improve performance of eviction-heavy workloads by dynamically controlling the number of eviction threads
WT-3097	Race on reconfigure or shutdown can lead to waiting for statistics log server
WT-3106	Add truncate support to command line wt utility
WT-3114	Avoid archiving log files immediately after recovery
WT-3115	Change the dhandle lock to a read/write lock
WT-3127	Fix a bug with CPU yield calls don't necessarily imply memory barriers
WT-3135	Fix a bug with search_near() for index with custom collator
WT-3137	Fix a hang in __log_slot_join/__log_slot_switch_internal
WT-3144	Fix a bug where random cursor returns not-found when descending to an empty page
WT-3148	Improve eviction efficiency with many small trees
WT-3149	Change eviction to start new walks from a random place in the tree
WT-3150	Reduce impact of checkpoints on eviction server
WT-3152	Convert table lock from a spinlock to a read write lock
WT-3157	Fix a bug in checkpoint/transaction integrity issue when writes fail.
WT-3158	Fix structure packing on Windows.
WT-3188	Fix error handling in logging where fatal errors could lead to a hang
WT-3193	Close a race between verify opening a handle and eviction visiting it
WT-3206	Fix a bug where core dump happened on NULL page index
WT-3218	Fix a bug that could lead to unexpected checkpoint ordering failures
WT-3243	Reorder log slot release so joins don't wait on IO
WT-3262	Stop making schema operations wait for cache

See JIRA changelog for a full listing:
https://jira.mongodb.org/browse/WT/fixforversion/17874

NOTE: The tag for the release is one commit behind the actual release package. The package contains a single document formatting change in addition.