minio snippet

minio

concept

Erasure Coding

Erasure Coding splits data into data and parity shards. For example, MinIO might use a 4:2 erasure code (should use 6 disks), meaning each object is split into 4 data shards and 2 parity shards.

In a 4:2 erasure coding setup:

4 data shards hold the actual object data.

2 parity shards are created for redundancy.

In this configuration, every object is broken into smaller pieces, with redundancy pieces (parity shards) stored to allow recovery if a disk or node fails.

client

install

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curl https://dl.min.io/client/mc/release/linux-amd64/mc \
  --create-dirs \
  -o $HOME/minio-binaries/mc

chmod +x $HOME/minio-binaries/mc

cp $HOME/minio-binaries/mc /usr/bin/

# service fiel
/usr/lib/systemd/system/minio.service

# default config file
/etc/default/minio
 
# reload config after modify default file
sudo systemctl stop minio
sudo systemctl daemon-reload

# 如果更改MINIO_VOLUMES信息，并且需要用到之前的一些盘符，需要清理干净相关目录的文件（包括隐藏文件 .minio.sys）
需要目录里清理遗留的所有文件 （rm -rf ./* 命令不会清理隐藏文件）

command

  • development
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# add development
mc alias set myminio {endpoint_address} {ak} {sk} 
# e.g. mc alias set myminio http://minio1.dev.net:19000 1111111 22222222

# ls alias
mc alias list

# overview info
mc admin info myminio

# check config 
mc admin config get myminio

  • bucket

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    # create bucket
    mc mb <ALIAS>/<BUCKET>

    # list bucket
    mc ls <ALIAS>

    # check bucket
    mc ls <ALIAS>/<BUCKET>

    # check object
    mc cat <ALIAS>/<BUCKET>/<OBJECT>

    # delete object
    mc rm <ALIAS>/<BUCKET>/<OBJECT>

    # delete all data
    mc rm --recursive --force <ALIAS>/<BUCKET>

    # force delete bucket
    mc rb --force <ALIAS>/<BUCKET>

  • erasure code

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# set erasure code
mc admin config set myminio storage_class standard=EC:0
# should restart minio.service, and 'systemctl status minio' will print 'WARN: The standard parity is set to 0. This can lead to data loss'

# check storage_class 
mc admin config get myminio storage_class