X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/75e196b201be758ffb857c3f2d33847e8cca0d18..21bcf992a7e4eb806ea45c851356b2a50015fa65:/services/keepstore/volume.go

diff --git a/services/keepstore/volume.go b/services/keepstore/volume.go
index cdaec92326..7966c41b92 100644
--- a/services/keepstore/volume.go
+++ b/services/keepstore/volume.go
@@ -36,7 +36,7 @@ type Volume interface {
 	// access log if the block is not found on any other volumes
 	// either).
 	//
-	// If the data in the backing store is bigger than BLOCKSIZE,
+	// If the data in the backing store is bigger than BlockSize,
 	// Get is permitted to return an error without reading any of
 	// the data.
 	Get(loc string) ([]byte, error)
@@ -52,7 +52,7 @@ type Volume interface {
 	//
 	// loc is as described in Get.
 	//
-	// len(block) is guaranteed to be between 0 and BLOCKSIZE.
+	// len(block) is guaranteed to be between 0 and BlockSize.
 	//
 	// If a block is already stored under the same name (loc) with
 	// different content, Put must either overwrite the existing
@@ -150,7 +150,7 @@ type Volume interface {
 	// loc is as described in Get.
 	//
 	// If the timestamp for the given locator is newer than
-	// blob_signature_ttl, Delete must not delete the data.
+	// blobSignatureTTL, Delete must not delete the data.
 	//
 	// If a Delete operation overlaps with any Touch or Put
 	// operations on the same locator, the implementation must
@@ -171,7 +171,7 @@ type Volume interface {
 	// reliably or fail outright.
 	//
 	// Corollary: A successful Touch or Put guarantees a block
-	// will not be deleted for at least blob_signature_ttl
+	// will not be deleted for at least blobSignatureTTL
 	// seconds.
 	Delete(loc string) error
 
@@ -195,6 +195,11 @@ type Volume interface {
 	// will fail because it is full, but Mtime or Delete can
 	// succeed -- then Writable should return false.
 	Writable() bool
+
+	// Replication returns the storage redundancy of the
+	// underlying device. It will be passed on to clients in
+	// responses to PUT requests.
+	Replication() int
 }
 
 // A VolumeManager tells callers which volumes can read, which volumes