MySQL 8.3 Release Notes
ndb_print_frag_file 从集群片段列表文件中获取信息。它旨在帮助诊断数据节点重新启动的问题。
使用
ndb_print_frag_file file_name
文件名
是集群片段列表文件的名称,匹配模式 S
,其中 X
.FragListX
是 2-9 之间的数字,位于数据节点文件系统中的数据节点 ID nodeid
,在目录 ndb_
中,其中 nodeid
_fs/DN
/DBDIH/N
是 1
或 2
。每个片段文件包含属于每个 NDB
表的片段记录。有关集群片段文件的更多信息,请参阅 NDB 集群数据节点文件系统目录。
像 ndb_print_backup_file、ndb_print_sys_file 和 ndb_print_schema_file(与大多数其他 NDB
实用程序不同,这些实用程序旨在在管理服务器主机上运行或连接到管理服务器),ndb_print_frag_file 必须在集群数据节点上运行,因为它直接访问数据节点文件系统。由于它不使用管理服务器,因此可以在管理服务器未运行时使用,甚至在集群完全关闭时。
附加选项
无。
示例输出
$> ndb_print_frag_file /usr/local/mysqld/data/ndb_3_fs/D1/DBDIH/S2.FragList
Filename: /usr/local/mysqld/data/ndb_3_fs/D1/DBDIH/S2.FragList with size 8192
noOfPages = 1 noOfWords = 182
Table Data
----------
Num Frags: 2 NoOfReplicas: 2 hashpointer: 4294967040
kvalue: 6 mask: 0x00000000 method: HashMap
Storage is on Logged and checkpointed, survives SR
------ Fragment with FragId: 0 --------
Preferred Primary: 2 numStoredReplicas: 2 numOldStoredReplicas: 0 distKey: 0 LogPartId: 0
-------Stored Replica----------
Replica node is: 2 initialGci: 2 numCrashedReplicas = 0 nextLcpNo = 1
LcpNo[0]: maxGciCompleted: 1 maxGciStarted: 2 lcpId: 1 lcpStatus: valid
LcpNo[1]: maxGciCompleted: 0 maxGciStarted: 0 lcpId: 0 lcpStatus: invalid
-------Stored Replica----------
Replica node is: 3 initialGci: 2 numCrashedReplicas = 0 nextLcpNo = 1
LcpNo[0]: maxGciCompleted: 1 maxGciStarted: 2 lcpId: 1 lcpStatus: valid
LcpNo[1]: maxGciCompleted: 0 maxGciStarted: 0 lcpId: 0 lcpStatus: invalid
------ Fragment with FragId: 1 --------
Preferred Primary: 3 numStoredReplicas: 2 numOldStoredReplicas: 0 distKey: 0 LogPartId: 1
-------Stored Replica----------
Replica node is: 3 initialGci: 2 numCrashedReplicas = 0 nextLcpNo = 1
LcpNo[0]: maxGciCompleted: 1 maxGciStarted: 2 lcpId: 1 lcpStatus: valid
LcpNo[1]: maxGciCompleted: 0 maxGciStarted: 0 lcpId: 0 lcpStatus: invalid
-------Stored Replica----------
Replica node is: 2 initialGci: 2 numCrashedReplicas = 0 nextLcpNo = 1
LcpNo[0]: maxGciCompleted: 1 maxGciStarted: 2 lcpId: 1 lcpStatus: valid
LcpNo[1]: maxGciCompleted: 0 maxGciStarted: 0 lcpId: 0 lcpStatus: invalid