{"id":5491,"date":"2026-06-15T14:01:13","date_gmt":"2026-06-15T14:01:13","guid":{"rendered":"https:\/\/cloudsave.app\/?p=5491"},"modified":"2026-06-15T16:00:14","modified_gmt":"2026-06-15T16:00:14","slug":"vm-%ec%8a%a4%eb%83%85%ec%83%b7%ec%9d%b4-%ed%8a%b8%eb%9e%9c%ec%9e%ad%ec%85%98-%eb%8d%b0%ec%9d%b4%ed%84%b0%eb%b2%a0%ec%9d%b4%ec%8a%a4%ec%97%90-%ec%95%88%ec%a0%84%ed%95%98%ec%a7%80-%ec%95%8a%ec%9d%80","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/ko\/knowledge-base\/vm-%ec%8a%a4%eb%83%85%ec%83%b7%ec%9d%b4-%ed%8a%b8%eb%9e%9c%ec%9e%ad%ec%85%98-%eb%8d%b0%ec%9d%b4%ed%84%b0%eb%b2%a0%ec%9d%b4%ec%8a%a4%ec%97%90-%ec%95%88%ec%a0%84%ed%95%98%ec%a7%80-%ec%95%8a%ec%9d%80\/","title":{"rendered":"VM \uc2a4\ub0c5\uc0f7\uc774 \ud2b8\ub79c\uc7ad\uc158 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0 \uc548\uc804\ud558\uc9c0 \uc54a\uc740 \uc774\uc720: DBA\ub97c \uc704\ud55c \ub370\uc774\ud130 \ubb34\uacb0\uc131 \uac00\uc774\ub4dc"},"content":{"rendered":"

DevOps \uc5d4\uc9c0\ub2c8\uc5b4\uc640 \uc2dc\uc2a4\ud15c \uad00\ub9ac\uc790\uc5d0\uac8c \uac00\uc0c1 \uba38\uc2e0(VM) \uc2a4\ub0c5\uc0f7\uc740 \uae30\ubcf8\uc801\uc778 \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uc2a4\ub0c5\uc0f7\uc740 \uc704\ud5d8\ud55c \ud328\uce58, \uc8fc\uc694 \uad6c\uc131 \ubcc0\uacbd \ub610\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ubc30\ud3ec \uc804\uc5d0 \uc11c\ubc84 \uc0c1\ud0dc\ub97c \ube60\ub974\uace0 \ud3b8\ub9ac\ud558\uac8c \ucea1\ucc98\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud558\ub354\ub77c\ub3c4 \uba87 \ucd08 \ub9cc\uc5d0 \ub864\ubc31\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

\uadf8\ub7ec\ub098 PostgreSQL, MySQL, Oracle \ub610\ub294 Microsoft SQL Server\uc640 \uac19\uc740 \ud2b8\ub79c\uc7ad\uc158 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0 \ub3d9\uc77c\ud55c \ubc29\ubc95\ub860\uc744 \uc801\uc6a9\ud558\uba74 VM \uc2a4\ub0c5\uc0f7\uc740 \uc548\uc804\ub9dd\uc5d0\uc11c \uc2dc\ud55c\ud3ed\ud0c4\uc73c\ub85c \ub3cc\ubcc0\ud569\ub2c8\ub2e4.<\/p>\n

\ub370\uc774\ud130\ubca0\uc774\uc2a4 \ubc31\uc5c5\uc744 \uc704\ud574 \ud45c\uc900 \ud558\uc774\ud37c\ubc14\uc774\uc800 \uc2a4\ub0c5\uc0f7\uc5d0 \uc758\uc874\ud558\ub294 \uac83\uc740 \ub370\uc774\ud130 \uc190\uc0c1, \ucc22\uc5b4\uc9c4 \ud398\uc774\uc9c0(torn pages), \ubcf5\uad6c \ubd88\uac00\ub2a5\ud55c \ud504\ub85c\ub355\uc158 \uc911\ub2e8\uc758 \uac00\uc7a5 \ud754\ud55c \uc6d0\uc778 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \uc774 \uae30\uc0ac\uc5d0\uc11c\ub294 \ud558\uc774\ud37c\ubc14\uc774\uc800\uc640 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4 \uac04\uc758 \uc544\ud0a4\ud14d\ucc98 \ucda9\ub3cc, \uc2a4\ub0c5\uc0f7 \uc911 \ub370\uc774\ud130 \uc190\uc0c1 \uba54\ucee4\ub2c8\uc998, \uadf8\ub9ac\uace0 \uac00\uc0c1\ud654\ub41c \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \uc548\uc804\ud558\uac8c \ubc31\uc5c5\ud558\uae30 \uc704\ud574 \ud544\uc694\ud55c \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \ubaa8\ubc94 \uc0ac\ub840\ub97c \uc0b4\ud3b4\ubd05\ub2c8\ub2e4.<\/p>\n

\uc544\ud0a4\ud14d\ucc98 \ucda9\ub3cc: \ud558\uc774\ud37c\ubc14\uc774\uc800 vs \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4<\/h2>\n

VM \uc2a4\ub0c5\uc0f7\uc774 \uc65c \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \uc704\ud5d8\uc5d0 \ube60\ub728\ub9ac\ub294\uc9c0 \uc774\ud574\ud558\ub824\uba74, \uba3c\uc800 \ub450 \uc2dc\uc2a4\ud15c\uc774 \uc0c1\ud0dc\uc640 I\/O \uc791\uc5c5\uc744 \uad00\ub9ac\ud558\ub294 \ubc29\uc2dd\uc744 \uc0b4\ud3b4\ubd10\uc57c \ud569\ub2c8\ub2e4.<\/p>\n

\ud558\uc774\ud37c\ubc14\uc774\uc800\uac00 \uc2a4\ub0c5\uc0f7\uc744 \uc2e4\ud589\ud558\ub294 \ubc29\uc2dd<\/h3>\n

\ud558\uc774\ud37c\ubc14\uc774\uc800(VMware ESXi, Microsoft Hyper-V, KVM \ub4f1)\uac00 \uc2a4\ub0c5\uc0f7\uc744 \uc0dd\uc131\ud560 \ub54c \ub514\uc2a4\ud06c\ub97c \ubcf5\uc0ac\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ub300\uc2e0 \ud604\uc7ac \uac00\uc0c1 \ub514\uc2a4\ud06c \ud30c\uc77c(\uc608: .vmdk<\/code> \ub610\ub294 .vhdx<\/code>)\uc744 \uc77d\uae30 \uc804\uc6a9 \uc0c1\ud0dc\ub85c \uace0\uc815\ud558\uace0 \uc0c8\ub85c\uc6b4 \ub378\ud0c0 \ub514\uc2a4\ud06c(\ucc28\ubd84 \ub514\uc2a4\ud06c)\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc774\ud6c4\uc758 \ubaa8\ub4e0 \uc4f0\uae30 \uc791\uc5c5\uc740 \uc774 \ub378\ud0c0 \ub514\uc2a4\ud06c\ub85c \uc804\ub2ec\ub429\ub2c8\ub2e4.<\/p>\n

\uc2a4\ub0c5\uc0f7\uc774 \uc0ad\uc81c\ub418\uba74 \ud558\uc774\ud37c\ubc14\uc774\uc800\ub294 \ub378\ud0c0 \ub514\uc2a4\ud06c\uc758 \ub370\uc774\ud130\ub97c \uae30\ubcf8 \ub514\uc2a4\ud06c\ub85c \ucee4\ubc0b(\ubcd1\ud569)\ud574\uc57c \ud569\ub2c8\ub2e4. \ud45c\uc900 \uc2a4\ub0c5\uc0f7\uc740 \uac8c\uc2a4\ud2b8 \uc6b4\uc601 \uccb4\uc81c \ub0b4\uc5d0\uc11c \uc2e4\ud589\ub418\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc804\ud600 \uc778\uc2dd\ud558\uc9c0 \ubabb\ud569\ub2c8\ub2e4. \uc2a4\ub0c5\uc0f7\uc740 \uadf8 \ub9c8\uc774\ud06c\ub85c\ucd08\uc5d0 \uc874\uc7ac\ud558\ub294 \uadf8\ub300\ub85c\uc758 \ub514\uc2a4\ud06c \uc0c1\ud0dc\ub97c \ucea1\ucc98\ud560 \ubfd0\uc785\ub2c8\ub2e4.<\/p>\n

\ud2b8\ub79c\uc7ad\uc158 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc0c1\ud0dc\ub97c \uad00\ub9ac\ud558\ub294 \ubc29\uc2dd<\/h3>\n

\ud2b8\ub79c\uc7ad\uc158 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 ACID \uc18d\uc131(\uc6d0\uc790\uc131, \uc77c\uad00\uc131, \uaca9\ub9ac\uc131, \uc9c0\uc18d\uc131)\uc744 \uc911\uc2ec\uc73c\ub85c \uc124\uacc4\ub418\uc5c8\uc2b5\ub2c8\ub2e4. ACID \uc900\uc218\ub97c \uc720\uc9c0\ud558\uba74\uc11c \uace0\uc131\ub2a5\uc744 \ub2ec\uc131\ud558\uae30 \uc704\ud574 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 \ubaa8\ub4e0 \ud2b8\ub79c\uc7ad\uc158\uc744 \uc989\uc2dc \ub514\uc2a4\ud06c\uc758 \uae30\ubcf8 \ub370\uc774\ud130 \ud30c\uc77c\uc5d0 \uc9c1\uc811 \uc4f0\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ub300\uc2e0 \ubcf5\uc7a1\ud55c \ub2e4\uc911 \uacc4\uce35 \uc544\ud0a4\ud14d\ucc98\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n

    \n
  1. \ubc84\ud37c \ud480 \/ \uacf5\uc720 \ubc84\ud37c:<\/strong> \ub370\uc774\ud130\ub294 \uc2dc\uc2a4\ud15c \uba54\ubaa8\ub9ac \ub0b4\uc5d0\uc11c \uc77d\ud788\uace0 \uc218\uc815\ub429\ub2c8\ub2e4.<\/li>\n
  2. Write-Ahead Log (WAL) \/ \ub9ac\ub450 \ub85c\uadf8:<\/strong> \ubcc0\uacbd \uc0ac\ud56d\uc740 \uc9c0\uc18d\uc131\uc744 \ubcf4\uc7a5\ud558\uae30 \uc704\ud574 \ub514\uc2a4\ud06c\uc758 \uace0\ub3c4\ub85c \ucd5c\uc801\ud654\ub41c \ub85c\uadf8 \ud30c\uc77c\uc5d0 \uc21c\ucc28\uc801\uc73c\ub85c \uae30\ub85d\ub429\ub2c8\ub2e4.<\/li>\n
  3. \uccb4\ud06c\ud3ec\uc778\ud2b8 \/ Lazy Writer:<\/strong> \uc8fc\uae30\uc801\uc73c\ub85c \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 \uba54\ubaa8\ub9ac\uc5d0\uc11c \uc218\uc815\ub41c(dirty) \ud398\uc774\uc9c0\ub97c \ub514\uc2a4\ud06c\uc758 \uc2e4\uc81c \ub370\uc774\ud130 \ud30c\uc77c\ub85c \ud50c\ub7ec\uc2dc\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n

    \uc774\ub7ec\ud55c \uc544\ud0a4\ud14d\ucc98 \ub54c\ubb38\uc5d0 \ub514\uc2a4\ud06c\uc758 \ubb3c\ub9ac\uc801 \ub370\uc774\ud130 \ud30c\uc77c\uc740 \uac70\uc758 \ud56d\uc0c1 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uc2e4\uc81c \uc0c1\ud0dc\uc640 \ub3d9\uae30\ud654\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uc9c4\uc815\ud55c \uc0c1\ud0dc\ub294 \ub514\uc2a4\ud06c\uc758 \ub370\uc774\ud130 \ud30c\uc77c, WAL\/\ub9ac\ub450 \ub85c\uadf8, \uadf8\ub9ac\uace0 \ud604\uc7ac \uba54\ubaa8\ub9ac\uc5d0 \uc788\ub294 \ub370\uc774\ud130\uc758 \uc870\ud569\uc73c\ub85c\ub9cc \uc874\uc7ac\ud569\ub2c8\ub2e4.<\/p>\n

    \uc704\ud5d8 \uad6c\uc5ed: VM \uc2a4\ub0c5\uc0f7 \uc911\uc5d0 \ubc1c\uc0dd\ud558\ub294 \uc77c<\/h2>\n

    \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc11c\ubc84\uc758 \ud45c\uc900 VM \uc2a4\ub0c5\uc0f7\uc744 \uc0dd\uc131\ud560 \ub54c, \ub2f9\uc2e0\uc740 \ud06c\ub798\uc2dc \uc77c\uad00\uc131(crash-consistent)<\/strong> \uc0c1\ud0dc\ub97c \ucea1\ucc98\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n

    \ud06c\ub798\uc2dc \uc77c\uad00\uc131 vs \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc77c\uad00\uc131<\/h3>\n

    \ud06c\ub798\uc2dc \uc77c\uad00\uc131 \uc2a4\ub0c5\uc0f7\uc740 \ubb3c\ub9ac\uc801 \uc11c\ubc84\uc5d0\uc11c \uc804\uc6d0 \ucf54\ub4dc\ub97c \ubf51\ub294 \uac83\uacfc \uac19\uc2b5\ub2c8\ub2e4. \ub514\uc2a4\ud06c \uc0c1\ud0dc\ub294 \ucea1\ucc98\ub418\uc9c0\ub9cc \uba54\ubaa8\ub9ac\uc5d0 \uc788\ub358 \ub0b4\uc6a9\uc740 \uc190\uc2e4\ub418\uba70, \uc2a4\ud1a0\ub9ac\uc9c0 \ucee8\ud2b8\ub864\ub7ec\ub85c \uc804\uc1a1 \uc911\uc774\ub358 \ub370\uc774\ud130\ub294 \uac11\uc790\uae30 \ucc28\ub2e8\ub429\ub2c8\ub2e4.<\/p>\n

    \ucd5c\uc2e0 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 Write-Ahead Log\ub97c \uc7ac\uc0dd\ud558\uc5ec \uc608\uae30\uce58 \uc54a\uc740 \uc804\uc6d0 \uc190\uc2e4\ub85c\ubd80\ud130 \ubcf5\uad6c\ud558\ub3c4\ub85d \uc124\uacc4\ub418\uc5c8\uc9c0\ub9cc, \ud06c\ub798\uc2dc \ubcf5\uad6c\ub97c \uae30\ubcf8 \ubc31\uc5c5 \uc804\ub7b5\uc73c\ub85c \uc758\uc874\ud558\ub294 \uac83\uc740 \ub9e4\uc6b0 \uc704\ud5d8\ud569\ub2c8\ub2e4. \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc5ec\ub7ec \uac00\uc0c1 \ub514\uc2a4\ud06c(\uc608: D: \ub4dc\ub77c\uc774\ube0c<\/code>\uc758 \ub370\uc774\ud130 \ud30c\uc77c\uacfc E: \ub4dc\ub77c\uc774\ube0c<\/code>\uc758 WAL)\uc5d0 \uac78\uccd0 \uc788\ub294 \uacbd\uc6b0, \ud558\uc774\ud37c\ubc14\uc774\uc800\uac00 \ub450 \ub514\uc2a4\ud06c\ub97c \uc815\ud655\ud788 \uac19\uc740 \ub9c8\uc774\ud06c\ub85c\ucd08\uc5d0 \uc2a4\ub0c5\uc0f7\ud558\uc9c0 \uc54a\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. WAL \ub514\uc2a4\ud06c \uc2a4\ub0c5\uc0f7\uc774 \ub370\uc774\ud130 \ub514\uc2a4\ud06c \uc2a4\ub0c5\uc0f7\ubcf4\ub2e4 \uc544\uc8fc \uc9e7\uc740 \uc2dc\uac04\uc774\ub77c\ub3c4 \ub2a6\uac8c \ucea1\ucc98\ub418\uba74, \ubcf5\uc6d0 \uc2dc \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc2dc\ud000\uc2a4 \ubc88\ud638\ub97c \uc870\uc815\ud560 \uc218 \uc5c6\uc5b4 \uce58\uba85\uc801\uc778 \uc190\uc0c1\uc774 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/p>\n

    \uace0\ud2b8\ub79c\uc7ad\uc158 \uc2dc\uc2a4\ud15c\uc5d0 \ubbf8\uce58\ub294 “VM \uc2a4\ud134(VM Stun)” \ud6a8\uacfc<\/h3>\n

    \uc2a4\ub0c5\uc0f7 \uc0dd\uc131 \uacfc\uc815, \uadf8\ub9ac\uace0 \ub354 \uc911\uc694\ud558\uac8c\ub294 \uc2a4\ub0c5\uc0f7 \ubcd1\ud569 \uacfc\uc815\uc740 “VM \uc2a4\ud134”\uc774\ub77c\uace0 \uc54c\ub824\uc9c4 \ud604\uc0c1\uc744 \uc720\ubc1c\ud569\ub2c8\ub2e4.<\/p>\n

    I\/O\ub97c \uae30\ubcf8 \ub514\uc2a4\ud06c\uc5d0\uc11c \ub378\ud0c0 \ub514\uc2a4\ud06c\ub85c \uc548\uc804\ud558\uac8c \uc804\ud658\ud558\uae30 \uc704\ud574 \ud558\uc774\ud37c\ubc14\uc774\uc800\ub294 \uac00\uc0c1 \uba38\uc2e0\uc744 \uc7a0\uc2dc \uc77c\uc2dc \uc911\uc9c0(\uc2a4\ud134)\ud574\uc57c \ud569\ub2c8\ub2e4. \ubd80\ud558\uac00 \uc801\uc740 \uc6f9 \uc11c\ubc84\uc758 \uacbd\uc6b0 \uc774 \uc2a4\ud134\uc740 10~50\ubc00\ub9ac\ucd08 \uc815\ub3c4 \uc9c0\uc18d\ub418\uc5b4 \ub208\uc5d0 \ub744\uc9c0 \uc54a\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub300\uaddc\ubaa8 I\/O\uac00 \ubc1c\uc0dd\ud558\ub294 \uace0\ucc98\ub9ac\ub7c9 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uacbd\uc6b0, \ud070 \ub378\ud0c0 \ub514\uc2a4\ud06c\ub97c \ubcd1\ud569\ud558\uba74 VM\uc774 \uba87 \ucd08 \ub3d9\uc548 \uba48\ucd9c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

    VM \uc2a4\ud134 \uc911\uc5d0\ub294:
    \n* \ub124\ud2b8\uc6cc\ud06c \uc5f0\uacb0\uc774 \ub04a\uaca8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ud0c0\uc784\uc544\uc6c3\uc774 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.
    \n* \uace0\uac00\uc6a9\uc131 \ud074\ub7ec\uc2a4\ud130(SQL Server Always On, PostgreSQL Patroni, MySQL Galera \ub4f1)\uac00 \ud558\ud2b8\ube44\ud2b8 \uccb4\ud06c\ub97c \ub193\uce69\ub2c8\ub2e4.
    \n* \ud074\ub7ec\uc2a4\ud130\uac00 \uba48\ucd98 \ub178\ub4dc\ub97c \uc8fd\uc740 \uac83\uc73c\ub85c \uac04\uc8fc\ud558\uc5ec \ubd88\ud544\uc694\ud558\uace0 \ud30c\uad34\uc801\uc778 \uc7a5\uc560 \uc870\uce58(\uc2a4\ud50c\ub9bf \ube0c\ub808\uc778 \uc2dc\ub098\ub9ac\uc624)\ub97c \ud2b8\ub9ac\uac70\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

    \ucc22\uc5b4\uc9c4 \ud398\uc774\uc9c0(Torn Pages) \ubc0f I\/O \ubd88\uc77c\uce58<\/h3>\n

    \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ud2b9\uc815 \ud398\uc774\uc9c0 \ud06c\uae30(\uc608: PostgreSQL \ubc0f SQL Server\uc758 \uacbd\uc6b0 8KB, InnoDB\uc758 \uacbd\uc6b0 16KB)\ub85c \ub370\uc774\ud130\ub97c \uc501\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uae30\ubcf8 \uc6b4\uc601 \uccb4\uc81c\uc640 \uc2a4\ud1a0\ub9ac\uc9c0 \uc5b4\ub808\uc774\ub294 \ub354 \uc791\uc740 \ube14\ub85d(\uc608: 4KB \ub610\ub294 512\ubc14\uc774\ud2b8)\uc73c\ub85c I\/O\ub97c \ucc98\ub9ac\ud569\ub2c8\ub2e4.<\/p>\n

    \ud558\uc774\ud37c\ubc14\uc774\uc800\uac00 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 8KB \ud398\uc774\uc9c0\ub97c \uc4f0\ub294 \ub3c4\uc911\uc5d0 \uc2a4\ub0c5\uc0f7\uc744 \ucc0d\uc73c\uba74, \uc2a4\ub0c5\uc0f7\uc740 \uc0c8 \ub370\uc774\ud130\uc758 \ucc98\uc74c 4KB\uc640 \uc774\uc804 \ub370\uc774\ud130\uc758 \ub9c8\uc9c0\ub9c9 4KB\ub97c \ucea1\ucc98\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uac83\uc774 \ucc22\uc5b4\uc9c4 \ud398\uc774\uc9c0(torn page)<\/strong>\ub97c \ub9cc\ub4ed\ub2c8\ub2e4. \uc2a4\ub0c5\uc0f7\uc744 \ubcf5\uc6d0\ud558\ub824\uace0 \ud558\uba74 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \ud574\ub2f9 \ud398\uc774\uc9c0\ub97c \uc77d\uc744 \ub54c \uccb4\ud06c\uc12c \uac80\uc99d\uc5d0 \uc2e4\ud328\ud558\uace0 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \uc190\uc0c1\ub41c \uac83\uc73c\ub85c \ud45c\uc2dc\ud569\ub2c8\ub2e4.<\/p>\n

    \ud2b9\uc815 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uc5d0 \ub300\ud55c \uc2e4\uc81c \uacb0\uacfc<\/h2>\n

    \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\ub9c8\ub2e4 \ud06c\ub798\uc2dc \uc77c\uad00\uc131 \uc2a4\ub0c5\uc0f7\uc5d0 \ubc18\uc751\ud558\ub294 \ubc29\uc2dd\uc740 \ub2e4\ub974\uc9c0\ub9cc, \ud504\ub85c\ub355\uc158 \ud658\uacbd\uc5d0\uc11c \uc774\ub97c \uc6d0\ud65c\ud558\uac8c \ucc98\ub9ac\ud558\ub294 \uc5d4\uc9c4\uc740 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n

      \n
    • PostgreSQL:<\/strong> PostgreSQL\uc740 pg_wal<\/code> \ub514\ub809\ud1a0\ub9ac\uc5d0 \ud06c\uac8c \uc758\uc874\ud569\ub2c8\ub2e4. \uc2a4\ub0c5\uc0f7\uc774 \ub370\uc774\ud130 \ub514\ub809\ud1a0\ub9ac($PGDATA<\/code>)\uc640 WAL\uc744 \ub3d9\uae30\ud654\ub418\uc9c0 \uc54a\uc740 \uc0c1\ud0dc\ub85c \ucea1\ucc98\ud558\uba74, PostgreSQL\uc740 \uc2dc\uc791\uc5d0 \uc2e4\ud328\ud558\uba70 PANIC: could not locate a valid checkpoint record<\/code> \uc624\ub958\ub97c \ubc1c\uc0dd\uc2dc\ud0b5\ub2c8\ub2e4.<\/li>\n
    • MySQL\/InnoDB:<\/strong> InnoDB\ub294 \ucc22\uc5b4\uc9c4 \ud398\uc774\uc9c0\ub97c \ubc29\uc9c0\ud558\uae30 \uc704\ud574 \uc774\uc911 \uc4f0\uae30 \ubc84\ud37c(doublewrite buffer)\ub97c \uc0ac\uc6a9\ud558\uba70, \uc774\ub294 \ud06c\ub798\uc2dc \uc77c\uad00\uc131 \uc0c1\ud0dc\uc5d0 \ub300\ud574 \uc5b4\ub290 \uc815\ub3c4 \ubcf4\ud638 \uae30\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ub098 ibdata1<\/code> \ud30c\uc77c\uacfc ib_logfile<\/code>\uc774 \ub3d9\uae30\ud654\ub418\uc9c0 \uc54a\uc740 \uc0c1\ud0dc\ub85c \ucea1\ucc98\ub418\uba74 InnoDB \uc5d4\uc9c4\uc740 \ubcf5\uad6c \uc2dc \ucda9\ub3cc\ud569\ub2c8\ub2e4.<\/li>\n
    • Microsoft SQL Server:<\/strong> SQL Server\ub294 I\/O \uace0\uc815\uc5d0 \ub9e4\uc6b0 \ubbfc\uac10\ud569\ub2c8\ub2e4. \uc801\uc808\ud55c VSS(Volume Shadow Copy Service) \ud1b5\ud569 \uc5c6\uc774\ub294 \ud45c\uc900 VM \uc2a4\ub0c5\uc0f7\uc5d0\uc11c SQL Server\ub97c \ubcf5\uc6d0\ud560 \ub54c \uc885\uc885 \uc758\uc2ec\uc2a4\ub7ec\uc6b4 \ub370\uc774\ud130\ubca0\uc774\uc2a4(suspect database)\uac00 \ub418\uac70\ub098 \ub85c\uadf8 \uccb4\uc778\uc774 \ub04a\uaca8 \uc2dc\uc810 \ubcf5\uad6c(PITR) \uae30\ub2a5\uc774 \ud30c\uad34\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n

      \uac00\uc0c1\ud654\ub41c \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \uc548\uc804\ud558\uac8c \ubc31\uc5c5\ud558\uae30 \uc704\ud55c \ubaa8\ubc94 \uc0ac\ub840<\/h2>\n

      \ud2b8\ub79c\uc7ad\uc158 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \ubcf4\ud638\ud558\ub824\uba74 \ud06c\ub798\uc2dc \uc77c\uad00\uc131 \ubc31\uc5c5\uc5d0\uc11c \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc77c\uad00\uc131(application-consistent)<\/strong> \ubc31\uc5c5\uc73c\ub85c \uc804\ud658\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \uc704\ud574\uc11c\ub294 \ubc31\uc5c5 \uba54\ucee4\ub2c8\uc998\uc774 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uacfc \ud1b5\uc2e0\ud558\uc5ec \uc2a4\ub0c5\uc0f7\uc774 \ucc0d\ud788\ub294 \ub3d9\uc548 \uba54\ubaa8\ub9ac\ub97c \ub514\uc2a4\ud06c\ub85c \ud50c\ub7ec\uc2dc\ud558\uace0 I\/O \uc791\uc5c5\uc744 \uc77c\uc2dc\uc801\uc73c\ub85c \uc911\uc9c0\ud558\ub3c4\ub85d \uac15\uc81c\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n

      1. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc778\uc2dd \ud034\uc5d0\uc2f1(VSS \ubc0f fsfreeze) \ud65c\uc6a9<\/h3>\n

      Windows (SQL Server)\uc758 \uacbd\uc6b0:<\/strong>
      \n\ubc31\uc5c5 \uc194\ub8e8\uc158\uc774 Microsoft VSS(Volume Shadow Copy Service)\ub97c \ud65c\uc6a9\ud558\ub294\uc9c0 \ud56d\uc0c1 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. VSS \uc778\uc2dd \ubc31\uc5c5\uc774 \ud2b8\ub9ac\uac70\ub418\uba74 SQL Server VSS Writer\uac00 \ub370\uc774\ud130\ubca0\uc774\uc2a4 I\/O\ub97c \uace0\uc815\ud558\uace0, \ubcf4\ub958 \uc911\uc778 \ud2b8\ub79c\uc7ad\uc158\uc744 \ub514\uc2a4\ud06c\ub85c \ud50c\ub7ec\uc2dc\ud558\uba70, \uc2a4\ub0c5\uc0f7\uc774 \uc644\ubcbd\ud558\uac8c \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc77c\uad00\uc131\uc744 \uc720\uc9c0\ud558\ub3c4\ub85d \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n

      Linux (PostgreSQL \/ MySQL)\uc758 \uacbd\uc6b0:<\/strong>
      \nLinux\uc5d0\ub294 VSS\uc640 \ub3d9\uc77c\ud55c \uae30\ubcf8 \uae30\ub2a5\uc774 \uc5c6\uc2b5\ub2c8\ub2e4. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc77c\uad00\uc131\uc744 \ub2ec\uc131\ud558\ub824\uba74 \ud558\uc774\ud37c\ubc14\uc774\uc800\uc758 \uac8c\uc2a4\ud2b8 \ub3c4\uad6c(\uc608: VMware Tools)\uc640 \ud568\uaed8 \uc0ac\uc804 \uace0\uc815(pre-freeze) \ubc0f \uc0ac\ud6c4 \ud574\uc81c(post-thaw) \uc2a4\ud06c\ub9bd\ud2b8\ub97c \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n

      \ub2e4\uc74c\uc740 PostgreSQL 15+\ub97c \uc704\ud574 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \uc548\uc804\ud558\uac8c \uc900\ube44\ud558\ub294 VMware pre-freeze-script<\/code> \uc608\uc2dc\uc785\ub2c8\ub2e4:<\/p>\n

      #!\/bin\/bash\n# \/usr\/sbin\/pre-freeze-script\n# \uc774 \uc2a4\ud06c\ub9bd\ud2b8\uac00 \uc2e4\ud589 \uac00\ub2a5\ud55c\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624 (chmod +x)\n\n# 1. PostgreSQL\uc5d0 \ubc31\uc5c5 \uc900\ube44\ub97c \uc54c\ub9bc\nsu - postgres -c \"psql -c \"SELECT pg_backup_start('vm_snapshot', true);\"\"\n\n# 2. \ud30c\uc77c \uc2dc\uc2a4\ud15c \ubc84\ud37c\ub97c \ub514\uc2a4\ud06c\ub85c \ud50c\ub7ec\uc2dc\nsync\n\n# 3. \ud30c\uc77c \uc2dc\uc2a4\ud15c \uace0\uc815 (\ub370\uc774\ud130\uac00 \/var\/lib\/pgsql\uc5d0 \uc788\ub2e4\uace0 \uac00\uc815)\nfsfreeze -f \/var\/lib\/pgsql\n<\/code><\/pre>\n
      \uadf8\ub9ac\uace0 \uc791\uc5c5\uc744 \uc7ac\uac1c\ud558\uae30 \uc704\ud55c \ub300\uc751\ud558\ub294 post-thaw-script<\/code>\uc785\ub2c8\ub2e4:<\/p>\n
      #!\/bin\/bash\n# \/usr\/sbin\/post-thaw-script\n\n# 1. \ud30c\uc77c \uc2dc\uc2a4\ud15c \uace0\uc815 \ud574\uc81c\nfsfreeze -u \/var\/lib\/pgsql\n\n# 2. PostgreSQL\uc5d0 \ubc31\uc5c5 \uc644\ub8cc\ub97c \uc54c\ub9bc\nsu - postgres -c \"psql -c \"SELECT pg_backup_stop();\"\"\n<\/code><\/pre>\n
      2. \uae30\ubcf8 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ubc31\uc5c5 \uc720\ud2f8\ub9ac\ud2f0 \uc0ac\uc6a9<\/h3>\n
      \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc77c\uad00\uc131 \uc2a4\ub0c5\uc0f7\uc774 \ud45c\uc900 \uc2a4\ub0c5\uc0f7\ubcf4\ub2e4 \ub0ab\uc9c0\ub9cc, \uc5ec\uc804\ud788 VM \uc2a4\ud134\uc758 \uc704\ud5d8\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ubc31\uc5c5\uc744 \uc704\ud55c \uac00\uc7a5 \uc548\uc804\ud55c \uc811\uadfc \ubc29\uc2dd\uc740 \ud558\uc774\ud37c\ubc14\uc774\uc800\uc640 \ub3c5\ub9bd\uc801\uc73c\ub85c \uc791\ub3d9\ud558\ub294 \uae30\ubcf8 \uc2a4\ud2b8\ub9ac\ubc0d \ubc31\uc5c5 \uc720\ud2f8\ub9ac\ud2f0\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n
      PostgreSQL (pg_basebackup):<\/strong><\/p>\n
      pg_basebackup -h localhost -U replication_user -D \/mnt\/backups\/pg_backup -Ft -z -P\n<\/code><\/pre>\n
      MySQL\/MariaDB (Percona XtraBackup \/ Mariabackup):<\/strong>
      \n\uc774 \ub3c4\uad6c\ub4e4\uc740 \ub370\uc774\ud130 \ud30c\uc77c\uc744 \ubcf5\uc0ac\ud558\uace0 \ub3d9\uc2dc\uc5d0 \ub9ac\ub450 \ub85c\uadf8\uc758 \ubcc0\uacbd \uc0ac\ud56d\uc744 \ucd94\uc801\ud558\uc5ec \ucc28\ub2e8 \uc5c6\ub294 \ud56b \ubc31\uc5c5\uc744 \uc218\ud589\ud569\ub2c8\ub2e4.<\/p>\n
      mariabackup --backup --target-dir=\/mnt\/backups\/mysql_backup --user=root --password=SecurePass\n<\/code><\/pre>\n
      SQL Server (T-SQL):<\/strong><\/p>\n
      BACKUP DATABASE [ProductionDB] \nTO DISK = N'Z:BackupsProductionDB.bak' \nWITH NOFORMAT, NOINIT, NAME = N'ProductionDB-Full Backup', \nSKIP, NOREWIND, NOUNLOAD, COMPRESSION, STATS = 10;\nGO\n<\/code><\/pre>\n
      3. \ub85c\uadf8 \uc544\uce74\uc774\ube59\uc744 \ud1b5\ud55c \uc2dc\uc810 \ubcf5\uad6c(PITR) \uad6c\ud604<\/h3>\n
      \uc77c\uc77c \uc2a4\ub0c5\uc0f7\uc774\ub098 \uc804\uccb4 \ubc31\uc5c5\uc740 \ubc31\uc5c5\uc774 \uc218\ud589\ub41c \uc2dc\uc810\uae4c\uc9c0\ub9cc \ubcf4\ud638\ud569\ub2c8\ub2e4. \uc624\ud6c4 4\uc2dc\uc5d0 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \ucda9\ub3cc\ud588\ub294\ub370 \ub9c8\uc9c0\ub9c9 \uc2a4\ub0c5\uc0f7\uc774 \uc624\uc804 2\uc2dc\uc600\ub2e4\uba74, 14\uc2dc\uac04 \ubd84\ub7c9\uc758 \ud2b8\ub79c\uc7ad\uc158 \ub370\uc774\ud130\ub97c \uc783\uac8c \ub429\ub2c8\ub2e4.<\/p>\n
      \uc9c4\uc815\ud55c \uc5d4\ud130\ud504\ub77c\uc774\uc988 \ubcf5\uc6d0\ub825\uc744 \ub2ec\uc131\ud558\ub824\uba74 \uc804\uccb4 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc77c\uad00\uc131 \ubc31\uc5c5\uacfc \uc9c0\uc18d\uc801\uc778 \ub85c\uadf8 \uc544\uce74\uc774\ube59(\uba87 \ubd84\ub9c8\ub2e4 WAL, \ub9ac\ub450 \ub85c\uadf8 \ub610\ub294 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ubc31\uc5c5)\uc744 \uacb0\ud569\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 DBA\ub294 \uc7ac\ud574 \ubc1c\uc0dd \uc804 \ud2b9\uc815 \ubd84 \ub610\ub294 \ud2b9\uc815 \ud2b8\ub79c\uc7ad\uc158 ID\ub85c \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \ubcf5\uc6d0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
      CloudSave\ub97c \ud65c\uc6a9\ud55c \uc5d4\ud130\ud504\ub77c\uc774\uc988 \ubc31\uc5c5 \uc804\ub7b5<\/h2>\n
      \uc218\uc2ed \uac1c\uc758 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc11c\ubc84\uc5d0 \uac78\uccd0 \uc0ac\uc6a9\uc790 \uc9c0\uc815 \uc0ac\uc804 \uace0\uc815 \uc2a4\ud06c\ub9bd\ud2b8, \uae30\ubcf8 \ub364\ud504\ub97c \uc704\ud55c \ud06c\ub860 \uc791\uc5c5, \ub85c\uadf8 \uc804\ub2ec\uc744 \uad00\ub9ac\ud558\ub294 \uac83\uc740 DevOps \ud300\uc5d0\uac8c \uc6b4\uc601\uc0c1\uc758 \uc545\ubabd\uc785\ub2c8\ub2e4. \ubc14\ub85c \uc774 \uc9c0\uc810\uc5d0\uc11c CloudSave\uc640 \uac19\uc740 \uc5d4\ud130\ud504\ub77c\uc774\uc988\uae09 \ud50c\ub7ab\ud3fc\uc774 \uc911\uc694\ud574\uc9d1\ub2c8\ub2e4.<\/p>\n
      CloudSave\ub294 \uac00\uc0c1\ud654\uc640 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc544\ud0a4\ud14d\ucc98 \uc0ac\uc774\uc758 \uac04\uadf9\uc744 \uba54\uc6cc\uc90d\ub2c8\ub2e4. \ub9f9\ubaa9\uc801\uc778 \ud558\uc774\ud37c\ubc14\uc774\uc800 \uc2a4\ub0c5\uc0f7\uc5d0 \uc758\uc874\ud558\ub294 \ub300\uc2e0, CloudSave\ub294 SQL Server, PostgreSQL, MySQL \ubc0f Oracle\uacfc \uae30\ubcf8\uc801\uc73c\ub85c \ud1b5\ud569\ub418\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc778\uc2dd \uc5d0\uc774\uc804\ud2b8\ub97c \ud65c\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n
      CloudSave\uac00 \ubc31\uc5c5\uc744 \uc2dc\uc791\ud558\uba74:
      \n1. \uae30\ubcf8 API(Windows\uc758 \uacbd\uc6b0 VSS, Linux\uc758 \uacbd\uc6b0 \uae30\ubcf8 WAL \uc2a4\ud2b8\ub9ac\ubc0d)\ub97c \ud1b5\ud574 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uacfc \uc9c1\uc811 \ud1b5\uc2e0\ud569\ub2c8\ub2e4.
      \n2. \ud30c\uad34\uc801\uc778 VM \uc2a4\ud134\uc744 \uc720\ubc1c\ud558\uc9c0 \uc54a\uace0 \uba54\ubaa8\ub9ac \ubc84\ud37c\ub97c \ub514\uc2a4\ud06c\ub85c \ud50c\ub7ec\uc2dc\ud558\ub3c4\ub85d \uc870\uc815\ud569\ub2c8\ub2e4.
      \n3. \ub370\uc774\ud130 \ud30c\uc77c\uc744 \uc548\uc804\ud558\uac8c \ucea1\ucc98\ud558\uace0 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \uc808\ub2e8\uc744 \uc790\ub3d9\uc73c\ub85c \uad00\ub9ac\ud569\ub2c8\ub2e4.
      \n4. \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\ub97c \uc9c0\uc18d\uc801\uc73c\ub85c \ubc31\uc5c5\ud558\uc5ec \uba87 \ubc88\uc758 \ud074\ub9ad\ub9cc\uc73c\ub85c \uc138\ubd84\ud654\ub41c \uc2dc\uc810 \ubcf5\uad6c(PITR)\ub97c \uac00\ub2a5\ud558\uac8c \ud569\ub2c8\ub2e4.<\/p>\n
      \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc77c\uad00\uc131\uc758 \ubcf5\uc7a1\uc131\uc744 CloudSave\ub85c \ub118\uae40\uc73c\ub85c\uc368, DBA\uc640 \uc2dc\uc2a4\ud15c \uad00\ub9ac\uc790\ub294 \ud504\ub85c\ub355\uc158 \ud074\ub7ec\uc2a4\ud130\uc758 \uc131\ub2a5\uc774\ub098 \uac00\uc6a9\uc131\uc744 \ud76c\uc0dd\ud558\uc9c0 \uc54a\uace0\ub3c4 \ub370\uc774\ud130 \ubb34\uacb0\uc131\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
      \uacb0\ub860<\/h2>\n
      \uac00\uc0c1 \uba38\uc2e0 \uc2a4\ub0c5\uc0f7\uc740 \uc778\ud504\ub77c \uad00\ub9ac\ub97c \uc704\ud55c \ub180\ub77c\uc6b4 \ub3c4\uad6c\uc774\uc9c0\ub9cc, \ud2b8\ub79c\uc7ad\uc158 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 ACID \uc694\uad6c \uc0ac\ud56d\uacfc\ub294 \uadfc\ubcf8\uc801\uc73c\ub85c \ud638\ud658\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ud06c\ub798\uc2dc \uc77c\uad00\uc131 \ud558\uc774\ud37c\ubc14\uc774\uc800 \uc2a4\ub0c5\uc0f7\uc5d0 \uc758\uc874\ud558\ub294 \uac83\uc740 \uc870\uc9c1\uc744 \ucc22\uc5b4\uc9c4 \ud398\uc774\uc9c0, \ub04a\uc5b4\uc9c4 \ubcf5\uc81c \uccb4\uc778 \ubc0f \uce58\uba85\uc801\uc778 \ub370\uc774\ud130 \uc190\uc2e4 \uc704\ud5d8\uc5d0 \ub178\ucd9c\uc2dc\ud0a4\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n
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