Solr 5.2.0 发布，全文搜索服务器
6月14日上海 OSC 源创会开始报名，送机械键盘和开源无码内裤
Solr 5.2.0 发布，值得关注的改进如下：
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Restore API allows restoring a core from an index backup.
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JSON Facet API
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unique() is now implemented for numeric and date fields
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Optional flatter form via a "type" parameter
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Added support for "mincount" parameter in range facets to suppress buckets less than that count
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Multi-select faceting support for the Facet Module via the "excludeTags" parameter which disregards any matching tagged filters for that facet.
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hll() facet function for distributed cardinality via HyperLogLog algorithm. See examples at http://yonik.com/solr-count-distinct/
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A new "facet.range.method" parameter to let users choose how to do range faceting between an implementation based on filters (previous algorithm, using "facet.range.method=filter") or DocValues ("facet.range.method=dv")
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Rule-based Replica assignment during collection, shard, and replica creation.
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