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[#1559] shard: Do not consult metabase in a degraded mode

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Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgenii Stratonikov 2022-06-29 14:27:36 +03:00 • committed by fyrchik
parent 339864b720
commit c8911d72d0
17 changed files with 114 additions and 67 deletions
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20
pkg/local_object_storage/shard/mode/mode.go
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@ -3,14 +3,14 @@ package mode
// Mode represents enumeration of Shard work modes.
type Mode uint32
const (
// ReadWrite is a Mode value for shard that is available
// for read and write operations. Default shard mode.
ReadWrite Mode = iota
// ReadWrite is a Mode value for shard that is available
// for read and write operations. Default shard mode.
const ReadWrite Mode = 0
const (
// ReadOnly is a Mode value for shard that does not
// accept write operation but is readable.
ReadOnly
ReadOnly Mode = 1 << iota
// Degraded is a Mode value for shard that is set automatically
// after a certain number of errors is encountered. It is the same as
@ -31,3 +31,13 @@ func (m Mode) String() string {
return "DEGRADED"
}
}
// NoMetabase returns true iff m is operating without the metabase.
func (m Mode) NoMetabase() bool {
return m&Degraded != 0
}
// ReadOnly returns true iff m prohibits modifying operations with shard.
func (m Mode) ReadOnly() bool {
return m&ReadOnly != 0
}