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Current Betas

Overview

• Overview and notes about leveldb - December 4, 2014
• Live code dive for Get and Write operations - December 12, 2014
• Live code dive for Iterators and Compactions - December 15, 2014
• Ricon 2013 presentation for leveldb - June 10, 2013

Branches

• disable recovery log option (dangerous) - February 28, 2017
• bucket level expiry for Riak - part 2 - February 6, 2017
• bucket level expiry for Riak - part 1 - November 18, 2016
• exclude Riak metadata keys from expiry - October 26, 2016
• adjust rules for non-penalty backlog compactions - October 22, 2016
• dynamic thread swap or not for Erlang writes - October 14, 2016
• random read performance gain, write throttle correction - October 6, 2016
• expiry iterator bug - August 19, 2016
• iterator close double delete fix - August 15, 2016
• better race condition fix (no semaphore) - July 7, 2016
• Rudimentary object expiry - Beta 1 - July 5, 2016
• 3rd eleveldb prefetch iterator lock-up (no segfault) - June 16, 2016
• 2nd eleveldb prefetch iterator lock-up (no segfault) - April 15, 2016
• timed grooming fix, then disabled - April 15, 2016
• eleveldb prefetch iterator lock-up (segfault) - April 2, 2016
• leveldb repair options in eleveldb - April 1, 2016
• basic expiry - March 23, 2016
• correct data loss scenario with tiered storage feature - February 29, 2016
• establish release capable of processing expiry encoded keys - February 2, 2016
• correct race condition that leads to segfault - January 7, 2016
• long overdue cleanup of Makefile - January 4, 2016
• store compile parameters in leveldb/ldb_config.h - December 31, 2015
• optimize skip list when sequentially loaded - August 28, 2015
• slight optimization for light to medium workloads - August 20, 2015
• warm file cache upon program restart - July 24, 2015
• adjust throttle for better level-2 management - June 26, 2015
• create sst tool for LZ4 experimentation - June 24, 2015
• restore Google's PickLevelForMemTableOutput() - June 17, 2015
• allow run time enable/disable of performance counters - June 17, 2015
• add optimizations for sequential writes and fix bugs - December 24, 2014
• write capacity versus write pacing - July 9, 2014
• better performance via dynamic page cache logic - July 3, 2014
• correct async close logic in June 2 mv-tuning7 branch - June 17, 2014
• even more 2.0 tuning, including segfault fix - June 2, 2014
• different mmap sizes for different type files - May 7, 2014
• clean up db mutex usage - May 5, 2014
• formalize options for tiered storage - April 7, 2014
• even more pre 2.0 tuning - February 13, 2014
• more pre 2.0 tuning - January 30, 2014
• pre 2.0 tuning - January 17, 2014
• iterator refresh - December 20, 2013
• fadvise control - December 11, 2013
• dynamic block_size - November 30, 2013
• aggressive delete - November 14, 2013 Updated April 6, 2014
• hot threads - October 14, 2013
• async close fix - October 14, 2013
• 1.4.2 patch - October 10, 2013
• autosizing caches - September 22, 2013
• valgrind cleanup - August 27, 2013
• Portable Spinlocks - August 22, 2013
• Correct memory leak on database close - August 9, 2013
• Account for time outside of leveldb in write throttle - July 24, 2013
• Misc. tunings / cleanup - July 22, 2013
• Correct race in write code / improve fadvise code - July 11, 2013
• Clean up throttle code - July 9, 2013
• Down shift from 3 overlapped levels to 2 overlapped levels - June 25, 2013
• CRC test of compaction reads - June 20, 2013
• Random read and FusionIO tuning - June 17, 2013
• File cache tuning 2 - May 24, 2013
• Repair by Level - May 17, 2013

Tech Notes

• leveldb key format - July 18, 2016
• +S x:x to counter Erlang busy wait - June 16, 2016
• +S x:x in Riak for 20 to 80% increase - August 7, 2013 Conclusions disputed June 16, 2016
• Repair notes - July 23, 2013
• perf_dump tool - June 18, 2013 (Updated Sept 29, 2016 to discuss enable/disable.)

" ... breadcrumbs to memories lost in beer ..." April 9, 2016