[MySQL] ํŠน์ • ์ด๋ฆ„์œผ๋กœ ์‹œ์ž‘ํ•˜๋Š” DB ์ผ๊ด„ ์‚ญ์ œ

JoonHo Son
์—ญ์‹œ ๊ตฌ๊ธ€์€ ๊ฐœ๋ฐœ์ž์˜ ์นœ๊ตฌ~ ์œ ํ›„~ # drop-db.sh DB_STARTS_WITH='sample_' # sample_table1, sample_table2... MUSER="" MPWD="" MYSQL="mysql" DBS="$($MYSQL -u$MUSER -p$MPWD -Bse 'show databases')" for db in $DBS; do if [[ "$db" =~ ^$PDB_STARTS_WITH}" ]]; then echo "Deleting $db" $MYSQL -u$MUSER -p$MPWD -Bse "drop database $db" fi done

Isolation level

JoonHo Son
// java.sql.Connection์— ์ •์˜๋จ int TRANSACTION_NONE = 0; int TRANSACTION_READ_UNCOMMITTED = 1; int TRANSACTION_READ_COMMITTED = 2; int TRANSACTION_REPEATABLE_READ = 4; int TRANSACTION_SERIALIZABLE = 8; ์•„๋ž˜์˜ ๋‚ด์šฉ์€ ํ˜ธ๋ฐ•๊ณ ๊ตฌ๋ฉ”์˜ ๊ฒŒ์ž„ ์ด์•ผ๊ธฐ ์—์„œ ์ผ๋ถ€ ๋ฐœ์ทŒ. ๊ฐ ๋ ˆ๋ฒจ๋ณ„ ์ƒ์ˆ˜๋Š” ๋ฐœ์ทŒํ•œ ๋ธ”๋กœ๊ทธ์˜ ๋‚ด์šฉ์ด ์ž˜๋ชป๋˜์–ด ์‹ค์ œ java.sql.Connection ํด๋ž˜์Šค์— ์ •์˜๋œ ์ƒ์ˆ˜๋กœ ๋Œ€์ฒด(๋ถ‰์€๊ธ€์”จ ) ์ฐจ๋‹จ ๋ ˆ๋ฒจ ์ฐจ๋‹จ๋ ˆ๋ฒจ (Isolcation level) Dirty read Non-repeatable read Phantom read TRANSACTION_READ_UNCOMMIT O O O TRANSACTION_READ_COMMIT X O O TRANSACTION_REPEATABLE_READ X X O(X) TRANSACTION_SERIALIZABLE X X X Connection ์ธํ„ฐํŽ˜์ด์Šค์—์„œ ํŠธ๋žœ์žญ์…˜ ์ฐจ๋‹จ ๋ ˆ๋ฒจ๊ณผ ๊ด€๋ จ๋œ ํ•„๋“œ ํ•„๋“œ ์„ค๋ช… ๊ฐ’ int TRANSACTION_NONE ํŠธ๋žœ์žญ์…˜์ด ์ง€์›๋˜์ง€ ์•Š์Œ์„ ๋‚˜ํƒ€๋‚ด๋Š” ์ƒ์ˆ˜ 0 int TRANSACTION_READ_UNCOMMITTED dirty read, non-repeatable read์™€ phantom read๊ฐ€ ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Œ์„ ๋‚˜ํƒ€๋‚ด๋Š” ์ƒ์ˆ˜ 1 int TRANSACTION_READ_COMMITTED dirty read๋Š” ๊ธˆ์ง€๋˜๊ณ , non-repeatable read์™€ phantom read๋Š” ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Œ์„ ๋‚˜ํƒ€๋‚ด๋Š” ์ƒ์ˆ˜ 2 int TRANSACTION_REPEATABLE_READ dirty read์™€ non-repeatable read๋Š” ๊ธˆ์ง€๋˜๊ณ , phantom read๋Š” ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Œ์„ ๋‚˜ํƒ€๋‚ด๋Š” ์ƒ์ˆ˜ 4 int TRANSACTION_SERIALIZABLE dirty read, non-repeatable read์™€ phantom read ๋ชจ๋‘ ๊ธˆ์ง€๋จ์„ ๋‚˜ํƒ€๋‚ด๋Š” ์ƒ์ˆ˜ 8

[MySQL] ํŠน์ • ์ด๋ฆ„์œผ๋กœ ์‹œ์ž‘ํ•˜๋Š” DB ๋ฐฑ์—… ๋ฐ ๋ณต๊ตฌ

JoonHo Son
์‚ฝ์งˆ + ๊ตฌ๊ธ€๋ง์œผ๋กœ ์™„์„ฑ. ๊ฐ๊ฐ์˜ ์ด๋ฏธ์ง€๋Š” ๋‹ค์Œ ๋งํฌ ์ฐธ์กฐ(gist) backup : https://gist.github.com/JoonHoSon/56cd2cfe5efa36d60d14473e19ecba92#file-backup-sh restore : https://gist.github.com/JoonHoSon/56cd2cfe5efa36d60d14473e19ecba92#file-restore-sh << backup >> << restore >>

Go์–ธ์–ด ์ง€์› platform/architecture

JoonHo Son
์ฐธ๊ณ  : Optional environment variables GOOS GOARCH aix ppc64 android 386 android amd64 android arm android arm64 darwin amd64 darwin arm64 dragonfly amd64 freebsd 386 freebsd amd64 freebsd arm illumos amd64 js wasm linux 386 linux amd64 linux arm linux arm64 linux ppc64 linux ppc64le linux mips linux mipsle linux mips64 linux mips64le linux s390x netbsd 386 netbsd amd64 netbsd arm openbsd 386 openbsd amd64 openbsd arm openbsd arm64 plan9 386 plan9 amd64 plan9 arm solaris amd64 windows 386 windows amd64

๋‹ค์‹œ ์ปด๋ฐฑ

JoonHo Son
์›Œ๋“œํ”„๋ ˆ์Šค self hosting์œผ๋กœ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ์—ˆ๋Š”๋ฐ… ๋ฐ์ดํ„ฐ๊ฐ€ ํ•œ ๋ฒˆ ๊ผฌ์ด๊ธฐ ์‹œ์ž‘ํ•˜๋‹ˆ๊นŒ, ๋ณต๊ตฌ๊ฐ€ ์‰ฝ์ง€ ์•Š๋‹ค. ๐Ÿ˜ญ ๊ทธ๋ƒฅ ํ‹ฐ์Šคํ† ๋ฆฌ๋กœ ์ปด๋ฐฑ!

์„œ์–‘ ๋ช…์ ˆ ์ „๋‚ .

JoonHo Son
์ค€ํ˜•์ด์™€ ํ•จ๊ป˜. ๊ฒ๋‚˜ ๋จน๊ณ , ์ฆ๊ฒ๊ฒŒ ๋– ๋“ค๋˜ ๊ธฐ์–ต์ด… ใ…‹ << ๊ณ ๊ธฐ! >> << ์ž…๊ฐ€์‹ฌ์šฉ ๋งฅ์ฃผ! >> << ๋…ธ๋ฆ‡๋…ธ๋ฆ‡ ์ต์–ด๊ฐ€๋Š” ๊ณ ๊ธฐ >> << 2์ฐจ ์•ˆ์ฃผ. ๊ฒฐ๊ตญ์€ ๋งŽ์ด ๋‚จ๊ธฐ๊ณ  ๋‚˜์™”๋‹ค. >>