Commit 915cb69a authored by Kirill Smelkov's avatar Kirill Smelkov

.

parent 03a6d5f4
......@@ -125,10 +125,12 @@ const (
// NodeUUID is a node identifier, 4-bytes signed integer
//
// High-order byte:
// 7 6 5 4 3 2 1 0
// | | | | +-+-+-+-- reserved (0)
// | +-+-+---------- node type
// +---------------- temporary if negative
//
// 7 6 5 4 3 2 1 0
// | | | | +-+-+-+-- reserved (0)
// | +-+-+---------- node type
// +---------------- temporary if negative
//
// UUID namespaces are required to prevent conflicts when the master generate
// new uuid before it knows uuid of existing storage nodes. So only the high
// order bit is really important and the 31 other bits could be random.
......
......@@ -68,6 +68,7 @@ type Master struct {
// NewMaster creates new master node that will listen on serveAddr.
//
// Use Run to actually start running the node.
func NewMaster(clusterName, serveAddr string, net xnet.Networker) *Master {
m := &Master{
......@@ -86,19 +87,22 @@ func NewMaster(clusterName, serveAddr string, net xnet.Networker) *Master {
return m
}
// Start requests cluster to eventually transition into running state
// it returns an error if such transition is not currently possible to begin (e.g. partition table is not operational)
// it returns nil if the transition began.
// Start requests cluster to eventually transition into running state.
//
// It returns an error if such transition is not currently possible to begin
// (e.g. partition table is not operational).
// It returns nil if the transition began.
//
// NOTE upon successful return cluster is not yet in running state - the transition will
// take time and could be also automatically aborted due to cluster environment change (e.g.
// a storage node goes down)
// take time and could be also automatically aborted due to cluster environment change (e.g.
// a storage node goes down).
func (m *Master) Start() error {
ech := make(chan error)
m.ctlStart <- ech
return <-ech
}
// Stop requests cluster to eventually transition into recovery state
// Stop requests cluster to eventually transition into recovery state.
func (m *Master) Stop() {
ech := make(chan struct{})
m.ctlStop <- ech
......
......@@ -37,7 +37,7 @@ import (
"lab.nexedi.com/kirr/go123/xerr"
)
// Storage is NEO node that keeps data and provides read/write access to it
// Storage is NEO node that keeps data and provides read/write access to it via network.
type Storage struct {
node *neo.NodeApp
......@@ -59,6 +59,7 @@ type Storage struct {
}
// NewStorage creates new storage node that will listen on serveAddr and talk to master on masterAddr.
//
// The storage uses zstor as underlying backend for storing data.
// Use Run to actually start running the node.
func NewStorage(clusterName, masterAddr, serveAddr string, net xnet.Networker, zstor zodb.IStorage) *Storage {
......
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