StackExchange.Redis

Release Notes

2.0.600

• add ulong support to RedisValue and RedisResult (#1103)
• fix: remove odd equality: "-" != 0 (we do, however, still allow "-0", as that is at least semantically valid, and is logically == 0) (related to #1103)
• performance: rework how pub/sub queues are stored - reduces delegate overheads (related to #1101)
• fix #1108 - ensure that we don’t try appending log data to the TextWriter once we’ve returned from a method that accepted one

2.0.593

• performance: unify spin-wait usage on sync/async paths to one competitor
• fix #1101 - when a ChannelMessageQueue is involved, unsubscribing via any route should still unsubscribe and mark the queue-writer as complete

2.0.588

• stability and performance: resolve intermittent stall in the write-lock that could lead to unexpected timeouts even when at low/reasonable (but concurrent) load

2.0.571

• performance: use new arena allocation API to avoid RawResult[] overhead
• performance: massively simplified how ResultBox<T> is implemented, in particular to reduce TaskCompletionSource<T> allocations
• performance: fix sync-over-async issue with async call paths, and fix the SemaphoreSlim problems that this uncovered
• performance: re-introduce the unsent backlog queue, in particular to improve async performance
• performance: simplify how completions are reactivated, so that external callers use their originating pool, not the dedicated IO pools (prevent thread stealing)
• fix: update Pipelines.Sockets.Unofficial to prevent issue with incorrect buffer re-use in corner-case
• fix: KeyDeleteAsync could, in some cases, always use DEL (instead of UNLINK)
• fix: last unanswered write time was incorrect
• change: use higher Pipe thresholds when sending

2.0.519

• adapt to late changes in the RC streams API (#983, #1007)
• documentation fixes (#997, #1005)
• build: switch to SDK 2.1.500

2.0.513

• fix #961 - fix assembly binding redirect problems; IMPORTANT: this drops to an older System.Buffers version - if you have manually added redirects for 4.0.3.0, you may need to manually update to 4.0.2.0 (or remove completely)
• fix #962 - avoid NRE in edge-case when fetching bridge

2.0.505

• fix #943 - ensure transaction inner tasks are completed prior to completing the outer transaction task
• fix #946 - reinstate missing TryParse methods on RedisValue
• fix #940 - off-by-one on pre-boxed integer cache (NRediSearch)

2.0.495

• 2.0 is a large - and breaking - change

The key focus of this release is stability and reliability.

• HARD BREAK: the package identity has changed; instead of StackExchange.Redis (not strong-named) and StackExchange.Redis.StrongName (strong-named), we are now only releasing StackExchange.Redis (strong-named). This is a binary breaking change that requires consumers to be re-compiled; it cannot be applied via binding-redirects
• HARD BREAK: the platform targets have been rationalized - supported targets are .NETStandard 2.0 (and above), .NETFramework 4.6.1 (and above), and .NETFramework 4.7.2 (and above) (note - the last two are mainly due to assembly binding problems)
• HARD BREAK: the profiling API has been overhauled and simplified; full documentation is provided here
• SOFT BREAK: the PreserveAsyncOrder behaviour of the pub/sub API has been deprecated; a new API has been provided for scenarios that require in-order pub/sub handling - the Subscribe method has a new overload without a handler parameter which returns a ChannelMessageQueue, which provides async ordered access to messsages)
• internal: the network architecture has moved to use System.IO.Pipelines; this has allowed us to simplify and unify a lot of the network code, and in particular fix a lot of problems relating to how the library worked with TLS and/or .NETStandard
• change: as a result of the System.IO.Pipelines change, the error-reporting on timeouts is now much simpler and clearer; the timeouts documentation has been updated
• removed: the HighPriority (queue-jumping) flag is now deprecated
• internal: most buffers internally now make use of pooled memory; RedisValue no longer pre-emptively allocates buffers
• internal: added new custom thread-pool for handling async continuations to avoid thread-pool starvation issues
• internal: all IL generation has been removed; the library should now work on platforms that do not allow runtime-emit
• added: asynchronous operations now have full support for reporting timeouts
• added: new APIs now exist to work with pooled memory without allocations - RedisValue.CreateFrom(MemoryStream) and operator support for Memory<byte> and ReadOnlyMemory<byte>; and IDatabase.StringGetLease[Async](...), IDatabase.HashGetLease[Async](...), Lease<byte>.AsStream())
• added: “streams” support (thanks to ttingen for their contribution)
• various missing commands / overloads have been added; Execute[Async] for additional commands is now available on IServer
• fix: a lot of general bugs and issues have been resolved
• ACCIDENTAL BREAK: RedisValue.TryParse was accidentally ommitted in the overhaul; this has been rectified and will be available in the next build

a more complete list of issues addressed can be seen in this tracking issue

Note: we currently have no plans to do an additional 1.* release. In particular, even though there was a 1.2.7-alpha build on nuget, we do not currently have plans to release 1.2.7.

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1.2.6

• fix change to cluster nodes output when using cluster-enabled target and 4.0+ (see redis #4186

1.2.5

• critical fix: “poll mode” was disabled in the build for net45/net60 - impact: IO jams and lack of reader during high load

1.2.4

• fix: incorrect build configuration (#649)

1.2.3

• fix: when using redis-cluster with multiple replicas, use round-robin when selecting replica (#610)
• add: can specify NoScriptCache flag when using ScriptEvaluate to bypass all cache features (always uses EVAL instead of SCRIPT LOAD and EVALSHA) (#617)

1.2.2 (preview):

• UNAVAILABLE: .NET 4.0 support is not in this build, due to a build issue - looking into solutions
• add: make performance-counter tracking opt-in (IncludePerformanceCountersInExceptions) as it was causing problems (#587)
• add: can now specifiy allowed SSL/TLS protocols (#603)
• add: track message status in exceptions (#576)
• add: GetDatabase() optimization for DB 0 and low numbered databases: IDatabase instance is retained and recycled (as long as no asyncState is provided)
• improved connection retry policy (#510, #572)
• add Execute/ExecuteAsync API to support “modules”; more info
• fix: timeout link fixed re /docs change (below)
• NRediSearch added as exploration into “modules”

Other changes (not library related)

• (project) refactor /docs for github pages
• improve release note tracking
• rework build process to use csproj

1.2.1

• fix: avoid overlapping per-endpoint heartbeats

1.2.0

• (same as 1.2.0-alpha1)

1.2.0-alpha1

• add: GEO commands (#489)
• add: ZADD support for new NX/XX switches (#520)
• add: core-clr preview support improvements

1.1.608

• fix: bug with race condition in servers indexer (related: 1.1.606)

1.1.607

• fix: ensure socket-mode polling is enabled (.net)

1.1.606

• fix: bug with race condition in servers indexer

and the rest

(I’m happy to take PRs for change history going back in time)

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