7.28.3

New Addition

• Adds support for the updated Arc Basic plan, now priced at $29/mo instead of $39/mo

Fixes

• Updates cache when a user or permission is updated or deleted so that invalid credentials can't be used oss
• Give priority to query_string over search_operators if both are set simultaneously in the ReactiveSearch API noss

7.28.2

Fixes

• Handles _bulk request for .logs indices by fixing the mappings
• Returns empty response for _reindex api as {} instead of nil to be consistent with other API endpoints

7.28.1

Fixes

• handles an edge-case with replace search query rule where scores were skewed due to addition of default fields key. We have removed passing this key entirely
• handles indices endpoint to return hidden indices for all versions >= 7.7.0

7.28.0

Reliability and Performance

This release includes major reliability ⎍ and performance enhancements 🚀 and as a result of the adoption of a rigorous benchmarking framework based on esrally by our team. 🤓

You should absolutely consider updating to this release! Read more on the details of the improvements below:

• Latency improvements: Arc is now very close to being optimal as a reverse proxy to an Elasticsearch upstream. This release includes performance enhancements based on profiling Arc's CPU and memory usage and should show a 50ms to 1s latency improvement [1] per request.
• Memory usage improvements: We've been able to get peak memory usage [2] shrink from 1.2GB+ to ~300MB (over 4x improvement). A major chunk of this improvement comes from a decision to have Arc save logs to the filesystem instead of sending to the Elasticsearch upstream. A fluentbit process now separately logs these to the Elasticsearch upstream, and controls the logging throughput using a combination of throttling, windowing and sending logs in bulk to have minimal impact on the actual throughput of the search applications.
• Reliability improvements: Earlier versions of Arc couldn't complete the benchmarking tests without crashing. Arc now reliably completes benchmarking without adding a significant throughput or latency overhead over directly using an Elasticsearch upstream.

See the detailed benchmark results report - Baseline uses an Elasticsearch upstream and the contender is Arc v7.28.0 release.

Features

• An enhancement in how Arc creates an index's search template covers some important gaps for a general-purpose search strategy and at the same time, improves the index's storage efficiency by up to 10% #123
• Introduction of a fluentbit based logging daemon to ensure that search application bursts get a higher priority than logs
• Add support for copying synonyms and search relevancy strategy across indexes
• Adds support for setting all Arc generated indices as hidden (which has been introduced starting Elasticsearch v7.7.0)

Fixes

• Search relevancy: Field weights can have floating values (previously, only integer values were supported)
• Default sniffing to false (no sniffing) instead of true as most Elasticsearch hosting services offer load balancing with an option to set sniffing (when you're hosting on your own and/or want to bypass an additional load balancer layer b/w Arc and Elasticsearch)

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[1] Latency improvements came as a result of making our usage of bcrypt more efficient (check once per unique user encountered) v/s check per request, and improving how each middleware interacts with the request and response bodies in a request's lifecycle. The most latency improvements are related to advanced (noss) features of search relevancy and query rules.

[2] Peak memory usage was measured after benchmarking with esrally on a custom track by performing a series of bulk requests, index-stats requests, node-stats requests, term queries, phrase queries, and uncached aggregations.

7.27.0_beta.5

fix: hidden index util to compare es version other than 7.7.X (#121)

7.27.0_beta.4

feat(reindex): add support to copy searchrelevancy and synonyms (#117)

7.27.0

Features

• Adds sniffing support for an upstream ElasticSearch cluster. This ensures HA when connecting via Arc [oss + noss]
• Query Rules: Add new actions for Add Filter, Search Settings, Replace Search Query and support replacing multiple words [noss]

Bug Fixes

• Fix the analytics: filter-labels route's working that had broken after the analytics' index rotation implementation [noss]
• Fix the default template to apply to all indices. An earlier attempt at patterning indexes to exclude system indices was faulty [oss+noss]
• Fix the default value for setting rate limits of categories/ACLs when left unspecified by the client [oss+noss]

7.26.1

Bug Fixes

• Fix mappings for suggestions index [noss]

7.26.0

Features

• Add support to filter logs by date range [oss]
• Add a new rule to apply search settings [noss]
• Fix add filter rule logic so it can get applied to all search type of queries [noss]

Bug Fixes

• Fix an analytics report with large records [noss]

Performance

• Fix replicas, shards settings and mapping template for system indices to save space [oss]
• Remove _source from the analytics document to save space [noss]

Arc generated system indices should now store 10x less data on average.

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To get the full benefits of this update, remove your existing system indices for .logs and .analytics.

7.25.0

Features

• Email monthly insights report

Bug fixes

• Fix date range in analytics.
• Fix analytics session generation.
• Fix query rules expression parsing
• Fix query rules and functions ordering
• Set default query format to OR