In this section you will learn how to start using MongoDB with the newly built glibc with LSE on your Arm machine.
Build and install MongoDB version 5.3.2 from source using the commands shown:
sudo apt install -y git gcc g++ python-dev-is-python3 python3-pip libssl-dev libcurl4-openssl-dev liblzma-dev
export PYTHON_KEYRING_BACKEND=keyring.backends.null.Keyring
cd ~
sudo git clone https://github.com/mongodb/mongo.git
cd mongo
sudo git checkout r5.3.2
sudo python3 -m pip install -r etc/pip/compile-requirements.txt
sudo python3 buildscripts/scons.py install-mongod -j$(expr $(nproc) - 1) --disable-warnings-as-errors
Create a directory for MongoDB to store its data files:
cd ~
mkdir -p ~/mongodb-5.3.2/data
Create a file named mongodb.conf in the ~/mongodb-5.3.2 directory using a file editor of your choice.
Copy and save the contents shown below into this configuration file:
dbpath=mongodb-5.3.2/data
logpath=mongodb-5.3.2/mongodb.log
pidfilepath=mongodb-5.3.2/data/mongo.pid
logappend=true
bind_ip=0.0.0.0
port=27017
You can now run MongoDB as shown below:
cp /usr/lib/aarch64-linux-gnu/libcrypt.so ~/glibc-2.32_build_install/build/crypt/
~/glibc-2.32_build_install/build/testrun.sh ~/mongo/build/install/bin/mongod -f ~/mongodb-5.3.2/mongodb.conf --wiredTigerCacheSizeGB=20
Confirm that the workload mongodb runs with the newly built glibc with LSE:
First, get the pid with the following command:
ps -ef | grep mongo
The output will look similar to:
root 19852 1 1 16:33 ? 00:00:01 /root/glibc-2.32_build_install/build/elf/ld-linux-aarch64.so.1 --library-path /root/glibc-2.32_build_install/build:/root/glibc-2.32_build_install/build/math:/root/glibc-2.32_build_install/build/elf:/root/glibc-2.32_build_install/build/dlfcn:/root/glibc-2.32_build_install/build/nss:/root/glibc-2.32_build_install/build/nis:/root/glibc-2.32_build_install/build/rt:/root/glibc-2.32_build_install/build/resolv:/root/glibc-2.32_build_install/build/mathvec:/root/glibc-2.32_build_install/build/support:/root/glibc-2.32_build_install/build/crypt:/root/glibc-2.32_build_install/build/nptl /root/mongo/build/install/bin/mongod -f /mongodb-5.3.2/mongodb.conf --wiredTigerCacheSizeGB=20
Next, execute the following command using the correct pid:
cat /proc/19852/smaps | grep glibc
The output should look similar to:
ffff898c5000-ffff898cd000 r-xp 00000000 103:02 953511 /root/glibc-2.32_build_install/build/crypt/libcrypt.so
ffff898cd000-ffff898e4000 ---p 00008000 103:02 953511 /root/glibc-2.32_build_install/build/crypt/libcrypt.so
ffff898e4000-ffff898e5000 r--p 0000f000 103:02 953511 /root/glibc-2.32_build_install/build/crypt/libcrypt.so
ffff898e5000-ffff898e6000 rw-p 00010000 103:02 953511 /root/glibc-2.32_build_install/build/crypt/libcrypt.so
ffff89f0a000-ffff8a060000 r-xp 00000000 103:02 943581 /root/glibc-2.32_build_install/build/libc.so
ffff8a060000-ffff8a077000 ---p 00156000 103:02 943581 /root/glibc-2.32_build_install/build/libc.so
ffff8a077000-ffff8a07a000 r--p 0015d000 103:02 943581 /root/glibc-2.32_build_install/build/libc.so
ffff8a07a000-ffff8a07d000 rw-p 00160000 103:02 943581 /root/glibc-2.32_build_install/build/libc.so
ffff8a080000-ffff8a09a000 r-xp 00000000 103:02 952971 /root/glibc-2.32_build_install/build/nptl/libpthread.so
ffff8a09a000-ffff8a0af000 ---p 0001a000 103:02 952971 /root/glibc-2.32_build_install/build/nptl/libpthread.so
ffff8a0af000-ffff8a0b0000 r--p 0001f000 103:02 952971 /root/glibc-2.32_build_install/build/nptl/libpthread.so
ffff8a0b0000-ffff8a0b1000 rw-p 00020000 103:02 952971 /root/glibc-2.32_build_install/build/nptl/libpthread.so
ffff8a0b5000-ffff8a14e000 r-xp 00000000 103:02 952919 /root/glibc-2.32_build_install/build/math/libm.so
ffff8a14e000-ffff8a164000 ---p 00099000 103:02 952919 /root/glibc-2.32_build_install/build/math/libm.so
ffff8a164000-ffff8a165000 r--p 0009f000 103:02 952919 /root/glibc-2.32_build_install/build/math/libm.so
ffff8a165000-ffff8a166000 rw-p 000a0000 103:02 952919 /root/glibc-2.32_build_install/build/math/libm.so
ffff8a71d000-ffff8a724000 r-xp 00000000 103:02 953138 /root/glibc-2.32_build_install/build/rt/librt.so
ffff8a724000-ffff8a73c000 ---p 00007000 103:02 953138 /root/glibc-2.32_build_install/build/rt/librt.so
ffff8a73c000-ffff8a73d000 r--p 0000f000 103:02 953138 /root/glibc-2.32_build_install/build/rt/librt.so
ffff8a73d000-ffff8a73e000 rw-p 00010000 103:02 953138 /root/glibc-2.32_build_install/build/rt/librt.so
ffff8a73e000-ffff8a741000 r-xp 00000000 103:02 952968 /root/glibc-2.32_build_install/build/dlfcn/libdl.so
ffff8a741000-ffff8a75d000 ---p 00003000 103:02 952968 /root/glibc-2.32_build_install/build/dlfcn/libdl.so
ffff8a75d000-ffff8a75e000 r--p 0000f000 103:02 952968 /root/glibc-2.32_build_install/build/dlfcn/libdl.so
ffff8a75e000-ffff8a75f000 rw-p 00010000 103:02 952968 /root/glibc-2.32_build_install/build/dlfcn/libdl.so
ffff90300000-ffff90313000 r-xp 00000000 103:02 953699 /root/glibc-2.32_build_install/build/resolv/libresolv.so
ffff90313000-ffff9032f000 ---p 00013000 103:02 953699 /root/glibc-2.32_build_install/build/resolv/libresolv.so
ffff9032f000-ffff90330000 r--p 0001f000 103:02 953699 /root/glibc-2.32_build_install/build/resolv/libresolv.so
ffff90330000-ffff90331000 rw-p 00020000 103:02 953699 /root/glibc-2.32_build_install/build/resolv/libresolv.so
ffff90333000-ffff90355000 r-xp 00000000 103:02 943577 /root/glibc-2.32_build_install/build/elf/ld.so
ffff90372000-ffff90373000 r--p 0002f000 103:02 943577 /root/glibc-2.32_build_install/build/elf/ld.so
ffff90373000-ffff90375000 rw-p 00030000 103:02 943577 /root/glibc-2.32_build_install/build/elf/ld.so
```
This output shows that the newly built glibc with LSE is being utilized.