ObjectStoreStats

1. Duration get{xxx}{"store.get_{xxx}_us"} :

The whole duration of get{xxx} xxx (blob, blobmetadata, tree, treemetadata) in ObjectStore. Consider that ObjectStore can get Object from memory (MemoryCache) or BackingStore

1. Counter get{xxx}FromMemory{"object_store.get_{xxx}.memory"} :

Count the number of xxx (blob, blobmetadata, tree, treemetadata) that are successfully obtained from MemoryCache. It doesn’t check the local store either.

1. Duration get{xxx}MemoryDuration{"object_store.get_{xxx}.memory_us"} :

Duration of get{xxx} (blobmetadata, tree) from MemoryCache.

1. Counter get{xxx}FromBackingStore{"object_store.get_{xxx}.backing_store"} :

Count the number of xxx (blob, blobmetadata, tree, treemetadata) that are obtained from BackingStore.

1. Duration get{xxx}BackingStoreDuration{"object_store.get_{xxx}.backing_store_us"} :

Duration of get{xxx} (blobmetadata, tree) from BackingStore. Note: As local store is disabled for Blob and TreeMetadata, then we don't have a separate duration for getBlob or getTreeMetadata from backing store. "store.get_blob_us" and "store.get_treemetadata_us" are the duration of backing store.

1. Counter get{xxx}Failed{"object_store.get_{xxx}_failed"} :

Count the number of xxx (blob, blobmetadata, tree, treemetadata) cannot be fetched.

1. Counter getBlobMetadataFromBlob{"object_store.get_blob_metadata.blob"} :

Count the number of BlobMetadata that cannot be obtained from BackingStore, but we obtained Blob and from Blob we found the BlobMetadata. Note: TreeMetadata cannot be computed locally, so the tree version of this counter does not exist.

1. Duration getBlobMetadataFromBlobDuration{"object_store.get_blob_metadata.from_blob_us"} :

Duration of get BlobMetadata from blob. In this case, BlobMetadata cannot be obtained from BackingStore, but we obtained Blob and from Blob we found the BlobMetadata.

1. Duration getRootTree{"store.get_root_tree_us"} :

The whole duration of getRootTree in ObjectStore.

1. Counter getRootTreeFromBackingStore{ "Object_store.get_root_tree.backing_store"} :

Count the number of RootTree that are obtained from BackingStore.

1. Counter getRootTreeFailed{"object_store.get_root_tree_failed"} :

Count the number of RootTree cannot be fetched.