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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project will adhere to Semantic Versioning starting v1.0.0.

0.1.1 - 2022-10-12

This release fixes certain arm64 build issues in the z package. It also incorporates CI steps in our repository.

Changed

Added

Fixed

0.1.0 - 2021-06-03

This release contains bug fixes and improvements to Ristretto. It also contains major updates to the z package. The z package contains types such as Tree (B+ tree), Buffer, Mmap file, etc. All these types are used in Badger and Dgraph to improve performance and reduce memory requirements.

Changed

  • Make item public. Add a new onReject call for rejected items. (#180)

Added

  • Use z.Buffer backing for B+ tree (#268)
  • expose GetTTL function (#270)
  • docs(README): Ristretto is production-ready. (#267)
  • Add IterateKV (#265)
  • feat(super-flags): Add GetPath method in superflags (#258)
  • add GetDuration to SuperFlag (#248)
  • add Has, GetFloat64, and GetInt64 to SuperFlag (#247)
  • move SuperFlag to Ristretto (#246)
  • add SuperFlagHelp tool to generate flag help text (#251)
  • allow empty defaults in SuperFlag (#254)
  • add mmaped b+ tree (#207)
  • Add API to allow the MaxCost of an existing cache to be updated. (#200)
  • Add OnExit handler which can be used for manual memory management (#183)
  • Add life expectancy histogram (#182)
  • Add mechanism to wait for items to be processed. (#184)

Fixed

  • change expiration type from int64 to time.Time (#277)
  • fix(buffer): make buffer capacity atleast defaultCapacity (#273)
  • Fixes for z.PersistentTree (#272)
  • Initialize persistent tree correctly (#271)
  • use xxhash v2 (#266)
  • update comments to correctly reflect counter space usage (#189)
  • enable riscv64 builds (#264)
  • Switch from log to glog (#263)
  • Use Fibonacci for latency numbers
  • cache: fix race when clearning a cache (#261)
  • Check for keys without values in superflags (#259)
  • chore(perf): using tags instead of runtime callers to improve the performance of leak detection (#255)
  • fix(Flags): panic on user errors (#256)
  • fix SuperFlagHelp newline (#252)
  • fix(arm): Fix crashing under ARMv6 due to memory mis-alignment (#239)
  • Fix incorrect unit test coverage depiction (#245)
  • chore(histogram): adding percentile in histogram (#241)
  • fix(windows): use filepath instead of path (#244)
  • fix(MmapFile): Close the fd before deleting the file (#242)
  • Fixes CGO_ENABLED=0 compilation error (#240)
  • fix(build): fix build on non-amd64 architectures (#238)
  • fix(b+tree): Do not double the size of btree (#237)
  • fix(jemalloc): Fix the stats of jemalloc (#236)
  • Don't print stuff, only return strings.
  • Bring memclrNoHeapPointers to z (#235)
  • increase number of buffers from 32 to 64 in allocator (#234)
  • Set minSize to 1MB.
  • Opt(btree): Use Go memory instead of mmap files
  • Opt(btree): Lightweight stats calculation
  • Put padding internally to z.Buffer
  • Chore(z): Add SetTmpDir API to set the temp directory (#233)
  • Add a BufferFrom
  • Bring z.Allocator and z.AllocatorPool back
  • Fix(z.Allocator): Make Allocator use Go memory
  • Updated ZeroOut to use a simple for loop. (#231)
  • Add concurrency back
  • Add a test to check concurrency of Allocator.
  • Fix(buffer): Expose padding by z.Buffer's APIs and fix test (#222)
  • AllocateSlice should Truncate if the file is not big enough (#226)
  • Zero out allocations for structs now that we're reusing Allocators.
  • Fix the ristretto substring
  • Deal with nil z.AllocatorPool
  • Create an AllocatorPool class.
  • chore(btree): clean NewTree API (#225)
  • fix(MmapFile): Don't error out if fileSize > sz (#224)
  • feat(btree): allow option to reset btree and mmaping it to specified file. (#223)
  • Use mremap on Linux instead of munmap+mmap (#221)
  • Reuse pages in B+ tree (#220)
  • fix(allocator): make nil allocator return go byte slice (#217)
  • fix(buffer): Make padding internal to z.buffer (#216)
  • chore(buffer): add a parent directory field in z.Buffer (#215)
  • Make Allocator concurrent
  • Fix infinite loop in allocator (#214)
  • Add trim func
  • Use allocator pool. Turn off freelist.
  • Add freelists to Allocator to reuse.
  • make DeleteBelow delete values that are less than lo (#211)
  • Avoid an unnecessary Load procedure in IncrementOffset.
  • Add Stats method in Btree.
  • chore(script): fix local test script (#210)
  • fix(btree): Increase buffer size if needed. (#209)
  • chore(btree): add occupancy ratio, search benchmark and compact bug fix (#208)
  • Add licenses, remove prints, and fix a bug in compact
  • Add IncrementOffset API for z.buffers (#206)
  • Show count when printing histogram (#201)
  • Zbuffer: Add LenNoPadding and make padding 8 bytes (#204)
  • Allocate Go memory in case allocator is nil.
  • Add leak detection via leak build flag and fix a leak during cache.Close.
  • Add some APIs for allocator and buffer
  • Sync before truncation or close.
  • Handle nil MmapFile for Sync.
  • Public methods must not panic after Close() (#202)
  • Check for RD_ONLY correctly.
  • Modify MmapFile APIs
  • Add a bunch of APIs around MmapFile
  • Move APIs for mmapfile creation over to z package.
  • Add ZeroOut func
  • Add SliceOffsets
  • z: Add TotalSize method on bloom filter (#197)
  • Add Msync func
  • Buffer: Use 256 GB mmap size instead of MaxInt64 (#198)
  • Add a simple test to check next2Pow
  • Improve memory performance (#195)
  • Have a way to automatically mmap a growing buffer (#196)
  • Introduce Mmapped buffers and Merge Sort (#194)
  • Add a way to access an allocator via reference.
  • Use jemalloc.a to ensure compilation with the Go binary
  • Fix up a build issue with ReadMemStats
  • Add ReadMemStats function (#193)
  • Allocator helps allocate memory to be used by unsafe structs (#192)
  • Improve histogram output
  • Move Closer from y to z (#191)
  • Add histogram.Mean() method (#188)
  • Introduce Calloc: Manual Memory Management via jemalloc (#186)

0.0.3 - 2020-07-06

Changed

Added

Fixed

  • z: use MemHashString and xxhash.Sum64String ([#153][])
  • Check conflict key before updating expiration map. ([#154][])
  • Fix race condition in Cache.Clear ([#133][])
  • Improve handling of updated items ([#168][])
  • Fix droppedSets count while updating the item ([#171][])

0.0.2 - 2020-02-24

Added

  • Sets with TTL. (#122)

Fixed

  • Fix the way metrics are handled for deletions. (#111)
  • Support nil *Cache values in Clear and Close. (#119)
  • Delete item immediately. (#113)
  • Remove key from policy after TTL eviction. (#130)

0.0.1

First release. Basic cache functionality based on a LFU policy.