[ https://issues.apache.org/jira/browse/SOLR-8931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
olivier soyez updated SOLR-8931: -------------------------------- Attachment: SOLR-8931.patch > SolrCloud RebalanceShards API > ----------------------------- > > Key: SOLR-8931 > URL: https://issues.apache.org/jira/browse/SOLR-8931 > Project: Solr > Issue Type: Wish > Components: SolrCloud > Reporter: olivier soyez > Priority: Minor > Labels: patch > Fix For: trunk > > Attachments: SOLR-8931.patch > > > It would be great to have RebalanceShards action in SolrCloud, such like > described in this post by Suruchi Shah : > "http://engineering.bloomreach.com/solrcloud-rebalance-api/" > By the way, in order to rebalance shards from a collection with > replicationFactor > 1, one idea could be to split some shards using the > rule-based replica placement. > Since https://issues.apache.org/jira/browse/SOLR-8728 jira issue, splitShard > is using rule-based replica placement (for the "replication" replicas). > As part of a proof of concept, the attached patch introduce a new action to > the collections API, named "REBALANCESHARDS", to rebalance some or all shards > among solrCloud nodes using splitShard. > After each splitShard, a deleteshard of the inactive parent shard is done. > One mandatory parameter: > - collection: the name of the collection > Two parameters: > - deltaMaxFromAverage (default: 20): use to select n shards (<= half of all > shards) to be split, whose number of docs are greater than > deltaMaxFromAverage percent of the average number of docs per shard > - force (default: false): if true, in case of none shards selected with the > deltaMaxFromAverage given, all shards of the collection will be selected to > be split > Use example: > curl > 'http://ip:port/solr/admin/collections?action=REBALANCESHARDS&collection=collection1&async=2&deltaMaxFromAverage=30' > Drawbacks: replicationFactor must be more than one, select shards based on > the average number of docs per shard is not suitable for all cases -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org