[tcaplusdb knowledge base] Introduction to tcaplusdb tcapulogmgr tool (I)

【TcaplusDB The knowledge base 】TcaplusDB-tcapulogmgr Tool is introduced （ One ）

tcapulogmgr Mainly used in relation to binlog To operate , When data is returned to file , If you need to shift back to the exact time point , You need to use this tool to achieve your goal . Enter the tool Directory , perform  ./tcapulogmgr -h  You can get the introduction and usage of each sub command ,tcapulogmgr The tool supports the following commands ：

• query

• listfile

• restorealldatafiles

• updatefields

Be careful ：

• When using tools , The version of the tool must be the same as svr Consistent versions of

• When copying or backing up engine files , The corresponding... Must be stopped correctly first svr process

• When using tools on engine files or ulog Before file operation , Please pay attention to the backup

• It is recommended to put the files and tools required by the command in the same directory , Or use the absolute path to specify the file

1. query

query The command is used to query binlog Running water , The command format is  ./tcapulogmgr query -d dirtory -f file -b tbus_id [-a app_id -z zone_id -t table_name -s shard_id --keyonly --startseq startseq --endseq endseq --starttime starttime --endtime endtime], among , The meanings of the first three required parameters are ：

• -d  Express binlog Directory of files

• -f  Indicates the... To be queried binlog file

• -b  Express tbus id, In fact, it is generated binlog Of documents tcapsvr Process of process id,  Such as 1.2.2.1

Optional parameters in square brackets can be used to filter , Its meaning is as follows ：

• -a  It means business id

• -z  Represent regional service id

• -t  Represents the data table name

• -s  Express shard id

• --keyonly  Means only query key Field

• --startseq  Indicates the beginning of binlog Record serial number

• --endseq  Signify the end of binlog Record serial number

• --starttime  Express binlog Record the start time , The format is YYYYMMDDHHMMSS

• --endtime  Express binlog Record the end time , The format is YYYYMMDDHHMMSS

It should be noted that , If you want to do business id, District Service id, Data table name and shard id To filter the words , Then all four parameters must be given , Otherwise, it cannot be filtered as required .

Example ：./tcapulogmgr query -d /data/tcaplus/data/ulog/1.2.2.1 -f tcapsvr_1.2.2.1_00000661.ulog -b 1.2.2.1 -a 2 -z 3 -t table_generic -s 304

2. listfile

listfile The command is used to output binlog File information for , Include the file name , Minimum serial number , Maximum serial number, etc , The command format is  ./tcapulogmgr listfile -d directory -b tbus_id [--startseq startseq --endseq endseq], The meaning of each parameter is the same as query The same command .

Example ：./tcapulogmgr listfile -d /data/tcaplus/data/ulog/1.2.2.1 -b 1.2.2.1

3. restorealldatafiles

restorealldatafiles The command is used to specify svr All data on the are returned to the specified point in time , It is generally applicable to the use of cold standby documents and binlog The scenario of file return . The command format is  ./tcapulogmgr restorealldatafiles --directory= --tbusid= --engine-directory= [--endtime= --seqcontinuous], among , The meanings of the first three required parameters are ：

• --directory  Express ulog directory

• --tbusid  Indicates that you want to perform a gear return operation svr_id, For from directory Filter out the corresponding ulog file

• --engine-directory  Indicates the directory where the cold standby file is stored

The parameters in square brackets are optional ：

• --endtime  Indicates the time point to return to the gear , The format is YYYYMMDDHHMMSSmmm,mmm Represents milliseconds

• --seqcontinuous  Express binlog The serial number of must be continuous , If it is not continuous, an error will be reported

Example ：./tcapulogmgr restorealldatafiles --directory=/data1/ulog/1.2.2.1/ --tbusid=1.2.2.1 --endtime=20201201163000000 --engine-directory=/txh/ --seqcontinuous

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