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"Fossies" - the Fresh Open Source Software Archive
ndb_print_frag_file − print NDB Fragment List File contents
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ndb_print_frag_file file_name |
ndb_print_frag_file obtains information from a cluster fragment list file. It is intended for use in helping to diagnose issues with data node restarts. Usage
ndb_print_frag_file file_name
file_name is the name of a cluster fragment list file, which matches the pattern SX.FragList, where X is a digit in the range 2−9 inclusive, and are found in the data node file system of the data node having the node ID nodeid, in directories named ndb_nodeid_fs/DN/DBDIH/, where N is 1 or 2. Each fragment file contains records of the fragments belonging to each NDB table. For more information about cluster fragment files, see NDB Cluster Data Node File System Directory [1] .
Like ndb_print_backup_file, ndb_print_sys_file, and ndb_print_schema_file (and unlike most of the other NDB utilities that are intended to be run on a management server host or to connect to a management server), ndb_print_frag_file must be run on a cluster data node, since it accesses the data node file system directly. Because it does not make use of the management server, this utility can be used when the management server is not running, and even when the cluster has been completely shut down. Additional Options
None. Sample Output
$>
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
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1. |
NDB Cluster Data Node File System Directory |
https://dev.mysql.com/doc/ndb-internals/en/ndb-internals-ndbd-filesystemdir-files.html
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.
Oracle Corporation (http://dev.mysql.com/).