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7719: permit never-delte to be set to false; add warning that datamanager is not...
[arvados.git]
/
services
/
keepstore
/
volume.go
diff --git
a/services/keepstore/volume.go
b/services/keepstore/volume.go
index cdaec9232685dffe50b485bdcbdac22ce0486c74..7966c41b92bd89958308ec77765f0b7a5a1f0fd9 100644
(file)
--- 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).
//
// access log if the block is not found on any other volumes
// either).
//
- // If the data in the backing store is bigger than B
LOCKSIZE
,
+ // If the data in the backing store is bigger than B
lockSize
,
// Get is permitted to return an error without reading any of
// the data.
Get(loc string) ([]byte, error)
// 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.
//
//
// loc is as described in Get.
//
- // len(block) is guaranteed to be between 0 and B
LOCKSIZE
.
+ // len(block) is guaranteed to be between 0 and B
lockSize
.
//
// If a block is already stored under the same name (loc) with
// different content, Put must either overwrite the existing
//
// 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
// 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.
+ // blob
SignatureTTL
, Delete must not delete the data.
//
// If a Delete operation overlaps with any Touch or Put
// operations on the same locator, the implementation must
//
// 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
// 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 blob
SignatureTTL
// seconds.
Delete(loc string) error
// 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
// 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
}
// A VolumeManager tells callers which volumes can read, which volumes