在ubuntu aws上，出现这些错误。还给777提供了rdb文件，但没有任何变化。
14282:M 22 Jul 11:57:59.040 * 1 changes in 900 seconds. Saving...
14282:M 22 Jul 11:57:59.040 * Background saving started by pid 16907
16907:C 22 Jul 11:57:59.040 # Failed opening .rdb for saving: Read-only file system
14282:M 22 Jul 11:57:59.140 # Background saving error
烫发
-rw-rw---- 1 redis redis 43104 Jul 22 11:29 dump.rdb