// constructor of storage server
func NewStorageserver(master string, numnodes int, portnum int, nodeid uint32) *Storageserver {
ss := &Storageserver{storage.NewTribMap(), newLeaseMap(), newCacheMap(),
nil, make(map[uint32]*serverData), numnodes,
storageproto.Client{"", nodeid}, sync.NewCond(&sync.Mutex{}), master}
return ss
}
func newCacheMap() *CacheMap { // constructor of cache map
cm := &CacheMap{cache: storage.NewTribMap(), cacheInfo: make(map[string]*cacheData)}
return cm
}