[in depth understanding of tcapulusdb technology] introduction tcapulusdb problem summary

【 In depth understanding of TcaplusDB technology 】 introduction TcaplusDB  Problem summary

Docker Summary of environmental issues

Docker Container start up tcapsvr Process Auto exit problem

Problem description

[20201103 21:33:11.239125][139625375184704][1.2.2.1][(tcaplus/src/common/monitor_process_util.cpp:360) (GetTlogPathImpl)][tcapsvr][ERROR ] popen grep -A 10000000 -e '<Type>.*FILE.*</Type>' '/data/tcaplus/tcaplus_service/cfg/storage_1_2_2_1/tcapsvr_log.xml' | grep 'Pattern' | awk -F '<Pattern>' '{print $2}'| awk -F '</Pattern>' '{print $1}' | head -n1 failed, error_msg: Cannot allocate memory.
[20201103 21:33:11.239150][139625375184704][1.2.2.1][(tcaplus/src/srv/tcapsvr_main_thread.cpp:841) (MainThreadInit)][tcapsvr][ERROR ] GetTlogPath failed, iRet: -281, Can Not Get Tcapsvr Tlog Path.
Question why


Question why

The machine has insufficient memory , Lead to docker The container does not have enough memory to run , Cause the process to exit , Solution ：

# Modify machine system parameters , Indicates that the kernel is allowed to allocate all physical memory , Regardless of the current memory state
echo 1 > /proc/sys/vm/overcommit_memory
#  Restart container
docker stop [ Containers id]
docker start [ Containers id]


Cross machine access docker Container timeout

Problem description

Cross machine access deployment docker Machine , newspaper －542, Connection timeout error ,

Question why

tcapluscli Tool execution , Report system library error

Problem description

/lib/ld-linux.so.2: bad ELF interpreter: No such file or directory


Question why

The lack of 32 Bit executable library glibc Support for , Problem solving ：

#centos7
yum install glibc.i686
#debian
apt-get install ia32-libs


C++ TDR SDK Problem summary

tcapluscli The tool creates a table group to prompt white list questions

Problem description

./tcapluscli tablegroup create -u http://localhost:5678 -g 4 -n zone_4
CreateTableGroup FAIL [LOCAL] :
{"app_id":["ip(172.18.0.1) not in whitelist to batch add zone(cmd:10006) of app_id:2"]}


Question why

The tool is not authorized, resulting in , Execute the following command to authorize all IP Your visits include Localhost:

./tcapluscli privilege -u http://localhost:5678 --allow-all-ip


TcaplusDB It's a distributed product of Tencent NoSQL database , The code for storage and scheduling is completely self-developed . With cache + Landing fusion architecture 、PB Levels of storage 、 Millisecond delay 、 Lossless horizontal expansion and complex data structure . At the same time, it has rich ecological environment 、 Easy migration 、 Extremely low operation and maintenance costs and five nine high availability features . Customer coverage game 、 Internet 、 government affairs 、 Finance 、 Manufacturing and the Internet of things .