RDDStorageInfo

== [[RDDStorageInfo]] RDDStorageInfo

[[creating-instance]] RDDStorageInfo contains information about RDD persistence:

• [[id]] RDD id
• [[name]] RDD name
• [[numPartitions]] Number of RDD partitions
• [[numCachedPartitions]] Number of cached RDD partitions
• [[storageLevel]] storage:StorageLevel.md[Storage level] ID
• [[memoryUsed]] Memory used
• [[diskUsed]] Disk used
• [[dataDistribution]] Data distribution (as Seq[RDDDataDistribution])
• [[partitions]] Partitions (as Seq[RDDPartitionInfo]])

RDDStorageInfo is <> exclusively when LiveRDD is requested to webui:spark-core-LiveRDD.md#doUpdate[doUpdate] (when requested to spark-core-LiveEntity.md#write[write]).

RDDStorageInfo is used when:

. web UI's StoragePage is requested to render an HTML spark-webui-StoragePage.md#rddRow[table row] and an entire spark-webui-StoragePage.md#rddTable[table] for RDD details

. REST API's AbstractApplicationResource is requested for spark-api-AbstractApplicationResource.md#rddList[rddList] (at storage/rdd path)

. AppStatusStore is requested for core:AppStatusStore.md#rddList[rddList]