filecoin调度中，任务是根据workerid选择worker的
每次重启worker id都会变
个人习惯把workerid固定住。
在文件worker_local 里边的
newLocalWorker函数
w := &LocalWorker{
storage: store,
localStore: local,
sindex: sindex,
ret: ret,
ct: &workerCallTracker{
st: cst,
},
acceptTasks: acceptTasks,
executor: executor,
noSwap: wcfg.NoSwap,
ignoreResources: wcfg.IgnoreResourceFiltering,
session: uuid.New(),//把这行改一下就行
closing:make(chan struct{}),
}
