{"id":323,"date":"2009-06-09T08:34:14","date_gmt":"2009-06-09T08:34:14","guid":{"rendered":"http:\/\/apollo89.com\/wordpress\/?p=323"},"modified":"2013-01-29T12:28:44","modified_gmt":"2013-01-29T03:28:44","slug":"java-%ec%97%90%ec%84%9c-shared-memory-%ec%82%ac%ec%9a%a9%ed%95%98%eb%a0%a4%eb%a9%b4","status":"publish","type":"post","link":"https:\/\/apollo89.com\/wordpress\/?p=323","title":{"rendered":"Java \uc5d0\uc11c shared memory \uc0ac\uc6a9\ud558\ub824\uba74 ?"},"content":{"rendered":"

 <\/p>\n

\uc790\ubc14\ub294 \uc4f0\ub808\ub4dc \ubaa8\ub378 \uae30\ubc18\uc758 \uc5b8\uc5b4\uc785\ub2c8\ub2e4. \uacf5\uc720 \uba54\ubaa8\ub9ac\ub294 \ud504\ub85c\uc138\uc2a4 \uae30\ubc18\uc758 \ubaa8\ub378\uc5d0\uc11c \uc11c\ub85c\uac04\uc758 \uc790\uc6d0\uc744 \uacf5\uc720\ud558\uc5ec \ud6a8\uc728\uc801\uc73c\ub85c \uc0ac\uc6a9\ud558\uae30 \uc704\ud55c \uac83\uc778\ub370, \uc4f0\ub808\ub4dc \uc790\uccb4\uac00 \ud558\ub098\uc758 \ud504\ub85c\uc138\uc2a4\uc5d0\uc11c \uc790\uc6d0\uc744 \uacf5\uc720\ud558\uc5ec \uc0ac\uc6a9\ud558\ub294 \uc2dc\ubd84\ud560\ucc98\ub9ac\uc758 \uac1c\ub150\uc774\ubbc0\ub85c \uae30\ubcf8\uc801\uc73c\ub85c ‘\uc790\ubc14\uc5d0\uc11c \uba54\ubaa8\ub9ac\ub97c \uad00\ub9ac\ud558\uace0 \uc2e4\ud589\ud558\ub294 \uac83 \uc790\uccb4\uac00 \ubaa8\ub450 \uacf5\uc720\uba54\ubaa8\ub9ac\ub97c \uc0ac\uc6a9\ud558\uace0 \uc788\ub2e4’\uace0 \ubcf4\uc2dc\uba74 \ub429\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc790\ubc14\uc5d0\ub294 ‘\uacf5\uc720\uba54\ubaa8\ub9ac’\ub77c\ub294 \uac1c\ub150\uc790\uccb4\uac00 \uc5c6\uc2b5\ub2c8\ub2e4. \uc65c\ub0d0\uba74, \uae30\ubcf8\uc801\uc73c\ub85c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uac83\uc774 \uacf5\uc720\uba54\ubaa8\ub9ac \ubc16\uc5d0 \uc5c6\uc73c\ub2c8\uae4c\uc694.<\/p>\n

\ub9cc\uc57d \uc774\ub7f0 \ubaa8\ub378\uc774 \uc544\ub2c8\ub77c\uba74 \uac00\ube44\uc9c0 \uceec\ub809\ud130(GC)\ub3c4, \ub3d9\uc801 \ud074\ub798\uc2a4 \ub85c\ub354\ub3c4 \uc874\uc7ac\ud560 \uc218 \uc5c6\uc744 \uac81\ub2c8\ub2e4. \uc790\ubc14\uc5d0\uc11c\ub294 \ud504\ub85c\uc138\uc2a4\ub294 \ub2e8 \ud558\ub098, JVM\uc774\ub77c\uace0 \ubd80\ub974\ub294 \uac00\uc0c1\uba38\uc2e0 \ud504\ub85c\uc138\uc2a4 \ud558\ub098\ubfd0\uc785\ub2c8\ub2e4. \uc74c, \uadf8\ub807\ub2e4\uba74 \uc5ec\ub7ec\uac1c\uc758 JVM \ud504\ub85c\uc138\uc2a4 \uac04\uc5d0 \ub9ac\uc18c\uc2a4 \uacf5\uc720\ub294 \uc5b4\ub5bb\uac8c \ud558\ub290\ub0d0? \ub77c\uace0 \ubb3c\uc73c\uc2e0\ub2e4\uba74, \ud604\uc7ac\ub85c\uc11c\ub294 \ub2f5\uc774 \uc5c6\uad70\uc694. \ub9cc\uc57d JVM \ub808\ubca8\uc758 \uc870\uc791\uc744 \ud5c8\uc6a9\ud558\uba74 \ubcf4\uc548\uc774\ub098 \uc548\uc815\uc131 \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud560\ud14c\ub2c8\uae4c\uc694. \uadf8\ub798\uc11c \uac00\ub2a5\ud558\uba74 JVM\uc744 \uc5ec\ub7ec\uac1c \ub744\uc6b0\uc9c0\uc54a\uace0 \ud558\ub098\uc758 JVM\uc5d0\uc11c \uc5ec\ub7ec\uac00\uc9c0\uc758 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ud638\ucd9c\ud558\ub294 \ud3b8\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/p>\n

JDK 7\uc5d0\uc11c\ub294 \ubaa8\ub4e0 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ud558\ub098\uc758 JVM\uc5d0\uc11c \uc2e4\ud589\ud560 \uc218 \uc788\ub3c4\ub85d Isolation API\ub77c\ub294 \uac83\uc744 \uace0\ub824\ud558\uace0 \uc788\ub2e4\uace0 \ud558\ub354\uad70\uc694. \uc774\ubbf8 \uc81c\uc548\uc740 \ub098\uc628 \uc0c1\ud0dc\uc778\ub370, \uad6c\ud604\uc774 \uc548\ub418\uc5c8\uc744 \ubfd0\uc774\uc8e0. \ub9cc\uc57d \uad6c\ud604\ub41c\ub2e4\uba74 \uc5ec\ub7ec\uac1c\uc758 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ud558\ub098\uc758 \uba38\uc2e0\uc5d0\uc11c \ub3d9\uc791\uc2dc\ud0ac \ub54c \uc9c0\uae08\uacfc\ub294 \ube44\uad50\ud560 \uc218 \uc5c6\uc744\uc815\ub3c4\ub85c \ud6a8\uc728\uc801\uc778 \uc790\uc6d0 \uc0ac\uc6a9\uc744 \ud560 \uc218 \uc788\uac8c \ub418\uaca0\uc9c0\uc694.<\/p>\n

P.S : \uc704\uc5d0 \ubd84\uc774 JNI\ub85c \uad6c\ud604\uc744 \ud55c\ub2e4\uace0 \ud558\uc168\ub294\ub370, JNI\ub85c \uad6c\ud604\uc744 \ud574\uc11c \uba54\ubaa8\ub9ac \uc601\uc5ed\uc744 \ud655\ubcf4\ud574\ub3c4 \uadf8\uac74 \uc790\ubc14\uc5d0\uc11c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uc601\uc5ed\uc774 \uc544\ub2d9\ub2c8\ub2e4. JNI\ub294 \uc5b4\ub514\uae4c\uc9c0\ub098 \ub124\uc774\ud2f0\ube0c \uc5b8\uc5b4\uc640 \uc790\ubc14 \uc0ac\uc774\uc758 \uad50\ub958 \uc5ed\ud560\uc744 \ud560 \ubfd0\uc774\uace0 \uc790\ubc14\uac1d\uccb4\ub294 \uc5b4\ub514\uae4c\uc9c0\ub098 JVM\uc758 \uc601\uc5ed \uc548\uc5d0\uc11c\ub9cc \uc874\uc7ac\ud560 \uc218 \uc788\uc73c\ub2c8\uae4c\uc694. \uc560\uc2dc\ub2f9\ucd08, \uc790\ubc14\uc5b8\uc5b4\uc758 \uc785\uc7a5\uc5d0\uc11c\ub294 \uacf5\uc720\uba54\ubaa8\ub9ac\ub97c \ub530\ub85c \ud655\ubcf4\ud560 \ud544\uc694\uac00 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n

Shared Memory\ub294 \ud504\ub85c\uc138\uc2a4\uac04\uc758 \uba54\ubaa8\ub9ac \uacf5\uc720\uc5d0 \uc4f0\uc785\ub2c8\ub2e4\ub9cc, \uc544\uc2dc\ub2e4\ud53c\uc2dc \uc790\ubc14 \uc5b4\ud50c\ub9ac\ucf00\uc774\uc158\uc740 JVM \uc548\uc5d0\uc11c\ub9cc \uc874\uc7ac\ud560 \uc218 \uc788\uc73c\uba70 JVM \uc790\uccb4\uac00 \ud558\ub098\uc758 \ud504\ub85c\uc138\uc2a4\uc785\ub2c8\ub2e4. \uc2e4\ud589\ub418\ub294 \uc5b4\ud50c\ub9ac\ucf00\uc774\uc158\uc740 \ubaa8\ub450 \uc4f0\ub808\ub4dc\uc774\uc9c0\uc694. \uac00\uc7a5 \uc911\uc694\ud55c \uac83\uc740 JVM\uc740 \ubcf4\uc548\uc774\ub098 \uc548\uc815\uc131\uc744 \uc774\uc720\ub85c JVM \uc678\ubd80\uc5d0 \ub300\ud55c \uc9c1\uc811\uc801\uc778 \uc811\uadfc\uc744 ‘\uc6d0\uce59\uc801\uc73c\ub85c \ud5c8\uc6a9\ud558\uc9c0 \uc54a\ub294\ub2e4’\ub294 \uac83 \uc785\ub2c8\ub2e4. \uc774\uac83\uc744 \ud5c8\uc6a9\ud558\uac8c \ub418\uba74 \uc790\ubc14\uc758 \ucca0\ud559\uc778 Write Once, Run Anywhere\uac00 \uae68\uc838\ubc84\ub9ac\ub294\ub370, \uc36c \uc785\uc7a5\uc5d0\uc11c\ub294 \uc6a9\ub0a9\ub420 \uc218 \uc5c6\ub294 \uc77c\uc774\uaca0\uc8e0.<\/p>\n

\ub530\ub77c\uc11c \ub2e4\ub978 \ud504\ub85c\uc138\uc2a4 – \ud558\ubb3c\uba70 \uadf8 \ud504\ub85c\uc138\uc2a4\uac00 \ubaa8\ub450 JVM\uc774\ub354\ub77c\ub3c4 – \uac04\uc758 \uba54\ubaa8\ub9ac \uacf5\uc720\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ubc29\ubc95\uc740 \uc804\ud1b5\uc801\uc73c\ub85c ‘\ud30c\uc77c’\uc774\uc5c8\uc2b5\ub2c8\ub2e4. \uc9c8\ubb38\ud558\uc2e0 \ubd84\uaed8\uc11c\ub3c4 \uac19\uc740 \uc758\ubbf8\ub85c \uc4f0\uc168\ub2e4\uace0 \uc0dd\uac01\ud569\ub2c8\ub2e4\ub9cc Memory Mapped File \uc785\ub2c8\ub2e4. MMF\ub97c \uc0ac\uc6a9\ud560 \ub54c \uac19\uc740 \uc9c0\uc810\uc758 \uba54\ubaa8\ub9ac\ub97c \uc77d\uc5b4\ub4e4\uc774\ub294 \uac83\uc774 \ub9de\ub290\ub0d0-\ub77c\uace0 \ubb3c\uc5b4\ubcf4\uc168\ub294\ub370… \uae00\uc384\uc694. \ub9de\uc744 \uc218\ub3c4, \ud2c0\ub9b4 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.
\n\uc6d0\uc778\uc744 \ub4e4\uc5b4\ubcf4\uc790\uba74…<\/p>\n

\uccab\uc9f8, \uc6b4\uc601\uccb4\uc81c\uc758 \ub514\uc2a4\ud06c \uc6b4\uc601\uc804\ub7b5\uc5d0 \ub530\ub77c\uc11c \uc989\uac01\uc801\uc778 ‘\uc4f0\uae30’\uac00 \uc774\ub8e8\uc5b4\uc9c0\uc9c0 \uc54a\uc744 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.
\n\uc608\ub97c \ub4e4\uc5b4 \ubc84\ud37c\ub9c1\uc774 \uc788\uaca0\uc9c0\uc694. NIO\uc5d0\uc11c\ub294 \uc774\ub7f0 \uacbd\uc6b0\uc5d0 \uc989\uac01\uc801\uc778 \uc4f0\uae30\ub97c \uc694\uccad\ud558\ub294 \uba54\uc18c\ub4dc\uac00 \uc788\uc2b5\ub2c8\ub2e4\ub9cc \uadf8 \ud6a8\uacfc\uac00 100% \ud655\uc2e4\ud788….\ub77c\uace0 \uc7a5\ub2f4\ud560 \uc218\ub294 \uc5c6\ub2e4\uace0 \uc54c\uace0\uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

\ub458\uc9f8, JVM \ub0b4\ubd80\uc5d0\uc11c \uc0ac\uc6a9\ud558\ub294 \ubc14\uc774\ud2b8 \uc21c\uc11c\ub294 \uc6b4\uc601\uccb4\uc81c\uc758 \ubc14\uc774\ud2b8 \uc21c\uc11c\uc640 \ud2c0\ub9b4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.
\nJVM\uc5d0\uc11c \uc0ac\uc6a9\ud558\ub294 \ubc14\uc774\ud2b8 \uc624\ub354\ub294 \ub124\ud2b8\uc6cc\ud06c\uc640 \ub9c8\ucc2c\uac00\uc9c0\ub85c \ube45 \uc778\ub514\uc548 \uc785\ub2c8\ub2e4. \ud30c\uc77c\uc5d0\uc11c \uac19\uc740 \uc9c0\uc810\uc5d0\uc11c \uac19\uc740 4\ubc14\uc774\ud2b8\ub97c \uc77d\uc5b4\ub4e4\uc600\ub2e4\uace0 \ud558\ub354\ub77c\ub3c4 C\ub85c \uc791\uc131\ud55c \ub124\uc774\ud2f0\ube0c \ud504\ub85c\uc138\uc11c\uc640 \uc790\ubc14 \uc5b4\ud50c\ub808\uc774\ucf00\uc774\uc158\uc5d0\uc11c \ub098\ud0c0\ub098\ub294 INT \uac12\uc740 \ub2e4\ub97c \uc218\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

\ub9c8\uc9c0\ub9c9\uc73c\ub85c C\uc5d0\uc11c \uba64\ubc84\uac12\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\uc2dd\uc740 ‘\ud3ec\uc778\ud130’\uc785\ub2c8\ub2e4. \ucc38\uc870\ub97c \ud1b5\ud574\uc11c \uc811\uadfc\ud558\uace0 \uc2f6\ub2e4\uba74 \ucc38\uc870\uac12\uc744 JVM\uc5d0\uc11c \uc5b4\ub5a4 \ubc29\uc2dd\uc744 \uc368\uc11c\ub4e0 \uc81c\uacf5\ud574\uc57c\ud558\ub294\ub370… \uc544\uc2dc\ub2e4\uc2dc\ud53c Shared Memory\ub294 GC\uc758 \ub300\uc0c1\uc774 \uc544\ub2d9\ub2c8\ub2e4. \uc989, \ucc38\uc870\uac12\uc744 \ub9cc\ub4e0\ub2e4\uace0 \ud558\ub354\ub77c\ub3c4 JVM \uc785\uc7a5\uc5d0\uc11c\ub294 \uad00\ub9ac\uac00 \ubd88\uac00\ub2a5\ud55c \uc560\ubb3c\ub2e8\uc9c0\uc778 \uc148\uc774\uc8e0. \uac89\ubcf4\uae30\uc5d0 \uc870\uae08 \ud3b8\ud55c \ubc29\ubc95\uc77c \ubfd0, \uacb0\uad6d JVM\uc5d0\uac8c ‘\ub0b4\uac00 \uc6d0\ud558\ub294 \uc7a5\uc18c\uc758 \uba54\ubaa8\ub9ac \uc811\uadfc\uc744 \ud5c8\uc6a9\ud574 \ub2ec\ub77c’\ub294 \uac83\uc778\ub370 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc6d0\uce59\uc801\uc73c\ub85c \ud5c8\uc6a9\ub418\uc9c0 \uc54a\ub294 \uc77c\uc785\ub2c8\ub2e4.<\/p>\n

\uadf8\ub798\uc11c \uc5b4\ub5bb\uac8c \ud558\ub780\ub9d0\uc774\ub0d0?<\/p>\n

\uc774\ub7f4 \ub54c \ub098\uc624\ub294 ‘\uc804\uac00\uc758 \ubcf4\ub3c4’, JNI \ub098 JNA \ubc16\uc5d0 \uc5c6\uc2b5\ub2c8\ub2e4. -_-;; \uba54\ubaa8\ub9ac\ub9f5 \ud30c\uc77c\uc744 \uc774\uc6a9\ud55c \uc5ec\ub7ec\uac00\uc9c0 \ud3b8\ubc95\uc774 \uc788\uaca0\uc9c0\ub9cc, \uc815\ub9d0\ub85c ‘Shared Memory’\ub97c \uc0ac\uc6a9\ud558\uc2dc\uace0 \uc2f6\uc73c\uc2dc\ub2e4\uba74 \ub2f5\uc740 \uc624\ub85c\uc9c0 \ud558\ub098. \uc790\ubc14 \ud504\ub85c\uc138\uc2a4(JVM)\uacfc C \ud504\ub85c\uc138\uc2a4\ub97c \uc5f0\uacb0\ud558\ub294 \ubcc4\ub3c4\uc758 \uc911\uac04 C \ud504\ub85c\uc138\uc2a4\ub97c DLL \ud615\ud0dc\ub85c \ub9cc\ub4e4\uc5b4\uc11c loadLibrary()\ub97c \uc0ac\uc6a9\ud574\uc11c \ud568\uc218\ub97c \ud638\ucd9c\ud558\ub294 \uac81\ub2c8\ub2e4. \ubb3c\ub860 \ub2e4\uc18c \uc624\ubc84\ud5e4\ub4dc\uac00 \uc788\ub2e4\uace0 \uc54c\uace0 \uc788\uc9c0\ub9cc \uc815\ub9d0 \ud06c\ub9ac\ud2f0\uceec\ud55c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc544\ub2c8\uba74 \uc0c1\uad00\uc5c6\ub2e4\uace0 \ub4e4\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n

\uae30\ud0c0 \ucc38\uace0 :
\nhttp:\/\/www.velocityreviews.com\/forums\/t141702-shared-memory-in-java.html
\nhttp:\/\/forums.sun.com\/thread.jspa?messageID=2699137
\nhttp:\/\/www.koders.com\/java\/fidE1510F023E541D2578505E190C4162A777AFD5B4.aspx?s=file%3Asemap*.java
\nhttp:\/\/www.codeproject.com\/KB\/java\/sharedmem_jni.aspx<\/p>\n","protected":false},"excerpt":{"rendered":"

  \uc790\ubc14\ub294 \uc4f0\ub808\ub4dc \ubaa8\ub378 \uae30\ubc18\uc758 \uc5b8\uc5b4\uc785\ub2c8\ub2e4. \uacf5\uc720 \uba54\ubaa8\ub9ac\ub294 \ud504\ub85c\uc138\uc2a4 \uae30\ubc18\uc758 \ubaa8\ub378\uc5d0\uc11c \uc11c\ub85c\uac04\uc758 \uc790\uc6d0\uc744 \uacf5\uc720\ud558\uc5ec \ud6a8\uc728\uc801\uc73c\ub85c \uc0ac\uc6a9\ud558\uae30 \uc704\ud55c \uac83\uc778\ub370, \uc4f0\ub808\ub4dc \uc790\uccb4\uac00 \ud558\ub098\uc758 \ud504\ub85c\uc138\uc2a4\uc5d0\uc11c \uc790\uc6d0\uc744 \uacf5\uc720\ud558\uc5ec \uc0ac\uc6a9\ud558\ub294 \uc2dc\ubd84\ud560\ucc98\ub9ac\uc758 \uac1c\ub150\uc774\ubbc0\ub85c \uae30\ubcf8\uc801\uc73c\ub85c ‘\uc790\ubc14\uc5d0\uc11c \uba54\ubaa8\ub9ac\ub97c \uad00\ub9ac\ud558\uace0 \uc2e4\ud589\ud558\ub294 \uac83 \uc790\uccb4\uac00 \ubaa8\ub450 \uacf5\uc720\uba54\ubaa8\ub9ac\ub97c \uc0ac\uc6a9\ud558\uace0 \uc788\ub2e4’\uace0 \ubcf4\uc2dc\uba74 \ub429\ub2c8\ub2e4. … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[662],"tags":[1466,410,411,412,413,96],"class_list":["post-323","post","type-post","status-publish","format-standard","hentry","category-java-jsp","tag-cc","tag-jni","tag-jvm","tag-mmf","tag-shared-memory","tag-java"],"yoast_head":"\nJava \uc5d0\uc11c shared memory \uc0ac\uc6a9\ud558\ub824\uba74 ? 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