Hello, I have a solr cloud cluster in a test environment running 6.1 where I am looking at using the collections API BACKUP and RESTORE commands to manage data integrity.
When restoring from a backup, I'm finding the same behavior occurs every time; after the restore command, all shards are being hosted on one node. What's especially surprising about this is that there are 6 live nodes beforehand, the collection has maxShardsPerNode set to 1, and this occurs even if I pass through the parameter maxShardsPerNode=1 to the API call. Is there perhaps somewhere else I need to configure something, or another step I am missing? If perhaps I'm misunderstanding the intention of these parameters, could you clarify for me and let me know how to support restoring different shards on different nodes? Full repro below. Thanks! *Repro* *Cluster state before* http://54.85.30.39:8983/solr/admin/collections?action=CLUSTERSTATUS&wt=json { "responseHeader" : {"status" : 0,"QTime" : 4}, "cluster" : { "collections" : {}, "live_nodes" : [ "172.18.7.153:8983_solr", "172.18.2.20:8983_solr", "172.18.10.88:8983_solr", "172.18.6.224:8983_solr", "172.18.8.255:8983_solr", "172.18.2.21:8983_solr"] } } *Restore Command (formatted for ease of reading)* http://54.85.30.39:8983/solr/admin/collections?action=RESTORE &collection=panopto &async=backup-4 &location=/mnt/beta_solr_backups &name=2016-09-02 &maxShardsPerNode=1 <response> <lst name="responseHeader"> <int name="status">0</int> <int name="QTime">16</int> </lst> <str name="requestid">backup-4</str> </response> *Cluster state after* http://54.85.30.39:8983/solr/admin/collections?action=CLUSTERSTATUS&wt=json { "responseHeader" : {"status" : 0,"QTime" : 8}, "cluster" : { "collections" : { "panopto" : { "replicationFactor" : "1", "shards" : { "shard2" : { "range" : "0-7fffffff", "state" : "construction", "replicas" : { "core_node1" : { "core" : "panopto_shard2_replica0", "base_url" : "http://172.18.2.21:8983/solr";, "node_name" : "172.18.2.21:8983_solr", "state" : "active", "leader" : "true" } } }, "shard1" : { "range" : "80000000-ffffffff", "state" : "construction", "replicas" : { "core_node2" : { "core" : "panopto_shard1_replica0", "base_url" : "http://172.18.2.21:8983/solr";, "node_name" : "172.18.2.21:8983_solr", "state" : "active", "leader" : "true" } } } }, "router" : { "name" : "compositeId" }, "maxShardsPerNode" : "1", "autoAddReplicas" : "false", "znodeVersion" : 44, "configName" : "panopto" } }, "live_nodes" : ["172.18.7.153:8983_solr", "172.18.2.20:8983_solr", "172.18.10.88:8983_solr", "172.18.6.224:8983_solr", "172.18.8.255:8983_solr", "172.18.2.21:8983_solr"] } } -- Stephen (206)753-9320 stephen-lewis.net
