[tcaplusdb knowledge base] Introduction to tcaplusdb tcaplusadmin tool

1. Enter the tool Directory , perform ./tcaplusadmin help You can get the introduction and usage of each sub command ,tcaplusadmin The tools mainly have the following commands ：

   1. analysehashbuckets

   2. validatedatafile

   3. statshm、createshm、rmshm

   4. compressengine、decompressengine

   5. analytic_data_dump

   Be careful ：

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

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

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

   4. 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. analysehashbuckets

   This command is used to analyze the statistics of binary trees in each hash bucket in the specified engine file , Including the number of nodes 、 Depth and other information , The command format is ./tcaplusadmin analysehashbuckets -f engfile, among ,engfile For the engine file to be analyzed .

   Example ：./tcaplusadmin analysehashbuckets -f /data1/1.2.2.1/AppID_2_ZoneID_3/test_table_1.txh

   2. validatedatafile

   This command is used to verify the validity of the engine file , The command format is ./tcaplusadmin validatedatafile -f engfile [--validate-type= ], The specific meanings of parameters are as follows ：

   • engfile Represents the engine file used to validate

   • --validate-type Indicates the content to be verified , Yes head、stat、lru、freeblock、datablock_offsetiter、datablock_hashiter Optional

   Example ：./tcaplusadmin validatedatafile -f /data1/1.2.2.1/AppID_2_ZoneID_3/test_table_1.txh --validate-type=head

   3. statshm、createshm、rmshm

   These three commands are used to view 、 establish 、 Delete shared memory belonging to the current user , The command format and its meaning are as follows ：

   • ./tcaplusadmin statshm： List all shared memory belonging to the current user

   • ./tcaplusadmin createshm： Create a piece of shared memory belonging to the current user

   • ./tcaplusadmin rmshm --shmid=x [--force]： Delete shmid by x Shared memory for ,--force Is an optional parameter , Indicates forced deletion

   4. compressengine、decompressengine

   These two commands are used to compress and decompress the engine files respectively , The command format and its meaning are as follows ：

   • ./tcaplusadmin compressengine -f engfile -c dir： Use LZO The algorithm compresses the specified engine file ,engfile For the engine file to be compressed ,dir Save directory for compressed engine files

   • ./tcaplusadmin decompressengine -f flzo -c dir： To use LZO Algorithm decompress the compressed engine file ,flzo For the use of LZO Algorithm compressed engine file ,dir Save directory for unzipped engine files

   5. analytic_data_dump

   This command is used to export the specified records in the engine file in the specified format , The command format is ./tcaplusadmin analytic_data_dump type so_name enginefileName appFlag zoneFlag tableName tdr_name, The specific meanings of the seven parameters are as follows ：

   • type： Usually it is “so”, Said the use of so File for data export （so The function interfaces to be implemented in and their related descriptions ）

   • so_name： User generated so file

   • enginefileName： A text file that records the engine file name , In this file , Each line corresponds to an engine file

   • appFlag： The business where the data table is located ID

   • zoneFlag： The server where the data table is located ID

   • tableName： Data table name

   • tdr_name： Data table tdr file

   Example ：./tcaplusadmin analytic_data_dump so mylib.so engfile.txt 2 3 test_table 2.3.test_table.tdr

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