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Benoit Tellier commented on JAMES-2078: --------------------------------------- https://github.com/linagora/james-project/pull/2738 is a POC for disabling dynamic mappings > disable dynamic parsing in our mapping and changing header structure > -------------------------------------------------------------------- > > Key: JAMES-2078 > URL: https://issues.apache.org/jira/browse/JAMES-2078 > Project: James Server > Issue Type: Improvement > Components: elasticsearch > Reporter: Luc DUZAN > Priority: Major > > We should turn off dynamic mapping > (https://www.elastic.co/guide/en/elasticsearch/reference/2.2/dynamic-field-mapping.html). > Dynamic mapping allow ES to automatically guess the type of a field when it > indexes a document with a field not described by the mapping. He will also > automatically create a index for it. This have two issues: > * Creating to much index and moreover creating parse index. This will slow > down write time > * Guessing wrong type. Imagine the first time ES receives an unknown field > with a number, he will update the mapping and specify this field should be a > number. If this is wrong and a new document arrive with this field but with a > String, the indexation of this document will fail! > After changing the mapping to dynamic, we will have an issue when indexing. > For the moment the header are stored in the following format inside ES: { > headers: { header1: value1, header2: value2}}. > If we keep this format with dynamic: false, header won't be search-able > because they will have no mapping. > To avoid this issue we will we change the format of the message to: { > headers: [{key: "header1", value: "value1"}, {key: "header2", value: > "value2"}]} > This can be express in the mapping with help of "nested": > https://www.elastic.co/guide/en/elasticsearch/reference/2.2/nested.html. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: server-dev-unsubscr...@james.apache.org For additional commands, e-mail: server-dev-h...@james.apache.org