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Part 3:
 Advanced topics and demo Leonardo YongUk Kim ([email protected])

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• MVCC (RMD) • Zero Copy (RMD) • Event Handling (RMD + RMP) • RMP Demo (RMP)

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MVCC: Multi Version Concurrency Control

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ݒ਋ ௾ B+ ౟ܻ৬ MVCC • ݒ਋ ௾ B+ ౟ܻܳ ஸۢ ӝળਵ۽ ҳࢿ. • ߸҃ ࢎ೦ਸ MVCC(Multi Version Concurrency Control)۽ ҙܻ.

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ݒ਋ ௾ B+ ౟ܻ … ప੉࠶ ܖ౟ ஸۢਵ۽ࠗఠ ؘ੉ఠ

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ਫ਼Ӭ݅ਃ? ৵ ஸۢࠗఠભ? … ప੉࠶ ܖ౟ ஸۢਵ۽ࠗఠ ؘ੉ఠ

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ੋؙझ ੉ܴ ੉ݫੌ ੹ചߣഐ 1 ٣஠೐ܻয় [email protected] 1004 2 ੐਷઱ [email protected] 1005 3 ѱ੉எ [email protected] 1006 4 ш޹਋ [email protected] 1007

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ੋؙझ ੉ܴ ੉ݫੌ ੹ചߣഐ 1 ٣஠೐ܻয় [email protected] 1004 2 ੐਷઱ [email protected] 1005 3 ѱ੉எ [email protected] 1006 4 ш޹਋ [email protected] 1007 ੉ܴਵ۽ ઑഥ೮णפ׮.

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ੋؙझ ੉ܴ ੉ݫੌ ੹ചߣഐ 1 ٣஠೐ܻয় [email protected] 1004 2 ੐਷઱ [email protected] 1005 3 ѱ੉எ [email protected] 1006 4 ш޹਋ [email protected] 1007 ੹ా੸ੋ ؘ੉ఋ߬੉झח ೠ઴ ঀ ੷੢೤פ׮. -> நए ޷झ

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ੋؙझ ੉ܴ ੉ݫੌ ੹ചߣഐ 1 ٣஠೐ܻয় [email protected] 1004 2 ੐਷઱ [email protected] 1005 3 ѱ੉எ [email protected] 1006 4 ш޹਋ [email protected] 1007 ೠ઴ ঀ ੷੢ೞݶ ਊ۝੉ ݏ૑ ঋইࢲ ಁ٬ب ֍যঠ ೤פ׮.

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ੋؙझ ੉ܴ ੉ݫੌ ੹ചߣഐ 1 ٣஠೐ܻয় [email protected] 1004 2 ੐਷઱ [email protected] 1005 3 ѱ੉எ [email protected] 1006 4 ш޹਋ [email protected] 1007 ೠ઴ঀ ੷੢ೞݶ நए൤౟ਯ੉ ֫Ҋ ಁ٬੉ ೙ਃহযਃ.

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׮઺ߡ੹ زदઁয(MVCC) A B C D F G E H I ߡ੹ 1 Root

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ॳӝ ౟ے੥࣌਷ ࢜ झշࢫਸ ٟ݅פ׮. A B C D F G E H I E’ H’ C’ A’ Root ߡ੹ 2

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ॳӝ ઺ীب ੍ӝо оמ೤פ׮. A B C D F G E H I E’ H’ C’ A’ ߡ੹ 2 ॳӝ઺ ߡ੹ 1 ੍ӝ ઺

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੍ӝח ߓఋ੸੉૑ ঋणפ׮. A B C D F G E H I E’ H’ C’ A’ ߡ੹ 2 ॳӝ઺ ਬ੷ 2: ߡ੹ 1 ੍ӝ ઺ ਬ੷ 1: ߡ੹ 1 ੍ӝ ઺

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উ੹೤פ׮ A B C D F G E H I E’ C’ A’ Root ߡ੹ 1 ੘ࢿ ઺ ೐ܻૉ ߊࢤ ߡ੹ 1਷ উ੹ ನੋఠب ৈ੹൤ ߡ੹ 1ਵ۽

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пӝ ׮ܲ झۨ٘ ۽ஸਸ о૘פ׮. A B C D F G E H I E’ H’ C’ A’ ਬ੷ 3:ߡ੹ 2 ॳӝ઺ ਬ੷ 2: ߡ੹ 1 ੍ӝ ઺ ਬ੷ 1: ߡ੹ 1 ੍ӝ ઺ झۨ٘ ۽ஸ 1: ߡ੹ 1 झۨ٘ ۽ஸ 2: ߡ੹ 1 झۨ٘ ۽ஸ 3: ߡ੹ 1 -> 2

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ഒۆझ۞਎ ࣻ ੓ח झۨ٘ ۽ஸ • ߓఋ੸੉૑ ঋѱ ബਯ੸ਵ۽ ੍ӝ, ॳӝܳ ೞӝ ਤ೧
 ݫఋ ؘ੉ఠܳ झۨ٘ ױਤ۽ ੷੢.
 • ݫݽܻ ݗਵ۽ োѾػ ؘ੉ఠח ݣ౭ झۨ٘۽ ҕਬغҊ ੓਺.
 • ׮݅ झۨ٘ ۽ஸ۽ ৌܽ Realm, RealmList, RealmResults, RealmObject ё୓ܳ ׮ܲ झۨ٘۽ ੹׳ೡ ࣻ হ਺.
 • ׮ܲ झۨ٘ীࢲ ௪ܻܳ ೞݶ ݣ౭ झۨ٘ ੗ܐ ҕਬ ؋ী ߄۽ ੍਺.

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Zero copy

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җѢ ಕ੉झ࠘ জ੄ ޙઁ੼ • JSON ੋ௏٬җ ٣௏٬ী ݆਷ ܻࣗझܳ ೲ࠺.
 • ࢎਊغ૑ ঋ਷ ؘ੉ఠب ٣௏٬ਸ ೧ࢲ Java ё୓ী ׸ওযঠ ೣ.
 • ೧Ѿ଼: ҳӖ੄ FlatBuffersܳ ॳ੗.

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੹ా੸ੋ ࣻച (Hydrate) • ؘ੉ఠ߬੉झীࢲ ੗ܐܳ ޙ੗ৌ੉ա ӝఋ ੋ௏٬ ػ ഋక۽ оઉ২פ׮.
 • ౵य ഑਷ ٣௏٬ਸ ೧ࢲ оઉৡ ؘ੉ఠܳ ކٶ Java ё୓ী ׸ইસפ׮.

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CPU৬ ݫݽܻܳ խ࠺ೞח ࣻച • ؘ੉ఠ߬੉झীࢲ ੗ܐܳ ޙ੗ৌ੉ա ӝఋ ੋ௏٬ػ ഋక۽ оઉ২פ׮. • ॳ૑ب ঋ਷ ؘ੉ఠب ׮ оઉয়Ҋ ߸ജө૑ Ѣଢ଼যਃ.
 • ౵य ഑਷ ٣௏٬ਸ ೧ࢲ оઉৡ ؘ੉ఠܳ ކٶ Java ё୓੄ ೙٘ ׸ই સפ׮. • ॳ૑ب ঋਸ ؘ੉ఠܳ ੹ࠗ ׮द ߸ജೞҊ ކٶ ೙٘ী ׸ওযਃ.

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FlatBuffers • Facebook জীࢲ FlatBuffers (Google)ਸ بੑೞৈ ਬݺ೧૗.

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Zero copy public long id() { int o = __offset(4); return o != 0 ? bb.getLong(o + bb_pos) : 0; }
 public String name() { int o = __offset(6); return o != 0 ? __string(o + bb_pos) : null; } 
 ByteBuffer bb = ByteBuffer.wrap(bytes);
 MyObject obj = MyObject.getRootAsMyObject(bb);
 long id = obj.id();
 String name = obj.name();


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• Realmب Zero copy അ੤ rowী ؀ೠ ੿ࠁ ஸۢҗ ۽਋੄ ੋؙझী null ഑਷ ޙ੗ৌਸ ੷੢ पઁ ؘ੉ఠо ׸ӟ ప੉࠶ ۽਋৬ ஸۢਸ ੉ਊ೧ࢲ झ౟݂ਸ о૑Ҋ ১

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• RealmProxyObject name setName getName RealmObject realmGet$name realmSet$name RealmProxyObject • Annotation Processing Tool੉ ੉ ੘সਸ ؀न೧સפ׮.

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Event Handling

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ؘ੉ఠ੄ ൒ܴ݅ ࢤпೞۄ. 1. ௿ۄ੉঱౟ب ੉߮౟ ӝ߈੄ ೐۽Ӓې߁. 2. ࢲߡ ࢎ੉٘(RMP)ب ੉߮౟ ӝ߈੄ ೐۽Ӓې߁. ௿ۄ੉঱౟
 ؘ੉ఠ ߸҃ ࢲߡ ࢎ੉٘
 ؘ੉ఠ ߸҃ ࢲߡ
 ೩ٜ۞ ഐ୹ ௿ۄ੉঱౟
 ೩ٜ۞ ഐ୹

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௿ۄ੉঱౟
 ؘ੉ఠ ߸҃ ࢲߡ ࢎ੉٘
 ؘ੉ఠ ߸҃ ࢲߡ
 ೩ٜ۞ ഐ୹ ௿ۄ੉঱౟
 ೩ٜ۞ ഐ୹

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௿ۄ੉঱౟
 ؘ੉ఠ ߸҃ ࢲߡ ࢎ੉٘
 ؘ੉ఠ ߸҃ ࢲߡ
 ೩ٜ۞ ഐ୹ ௿ۄ੉঱౟
 ೩ٜ۞ ഐ୹

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Good bye REST!

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RMP Demo

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Code

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জ ࣗѐ
 (Scanner)

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ࢎ૓੉ա ଼ਸ झப೧ࢲ

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IBM Watson ࢲ࠺झܳ ج۰ࢲ…

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೧ࢳػ Ѿҗܳ ߈ജ೤פ׮.

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ࢎਊ੗о ࢎ૓ਸ ନणפ׮.

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۽ஸ DBী زӝചؾפ׮.

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۽ஸ DB৬ ࢲߡо زӝച

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ࢲߡ੄ ੉߮౟ ೩ٜ۞о ৌ݀פ׮

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੉߮౟ ೩ٜ۞о ৲टী ੉޷૑ܳ ੹׳೤פ׮.

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৲ट੉ ੉޷૑ܳ ࠙ࢳ೤פ׮ -_-b

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୊ܻ Ѿҗо ੉߮౟ ೩ٜ۞ীѱ ܻఢ

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੉߮౟ ೩ٜ۞о DBܳ সؘ੉౟ ೤פ׮

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ࢲߡ৬ ۽ஸ DBо زӝച

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௿ۄ੉঱౟੄ ߸҃ ܻझց ഐ୹غҊ UIܳ јन೤פ׮

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Scanner জ ੷੢ࣗ https://github.com/realm-demos/realm-scanner [email protected]

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ݽ؛ Scanner, Swift

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nullਸ ೲਊೞ૑ ঋणפ׮.

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?۽ ՘աח ఋੑ਷ null ೲਊ

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ݽ؛ Scanner, Java

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RealmObject ё୓ܳ ࢚ࣘ.

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nullਸ ೲਊೞ૑ ঋח ೙٘.

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಴ળ getters/setters ೙ࣻח ইתפ׮.

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ੋૐ (Java)

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ই੉٣, ಁझਕ٘ܳ ੹׳೧ࢲ SyncCredetialsܳ ٟ݅פ׮.

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۽Ӓੋ

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ੋૐ ࢲߡ ҃۽

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ࢿҕ

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Realm ࢸ੿

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ؘ੉ఠ ߬੉झ੄ ҃۽

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Realm ੋझఢझ

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Realm ੋझఢझܳ ੜ ײ਻द׮.
 (ۨಌ۠झ ஠਍౟)

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ੋૐ (Swift)

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۽Ӓੋਸ ೤פ׮.

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Realm ࢸ੿

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Realm ੋझఢझ

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׮নೠ ੋૐ (Java)

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׮নೠ ੋૐ (Swift)

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ॳӝ

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ॳӝী݅ ౟ے੥࣌ ࢤࢿ

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ݽ؛ਸ ੉ਊೞৈ ੋझఢझ ࢤࢿ

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Scan ੋझఢझ੄ ࢚క ࣻ੿

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߸҃ ҙܻܳ ਤೠ ੉߮౟ ܻझց ١۾ ࢲߡա জ੄ ׮ܲ ࠗ࠙ীࢲ ؘ੉ఠо ߸҃غ঻ਸ ٸ ܻझցܳ ഐ୹. (iOS੄ ҃਋ীח Key-Value Observationب ૑ਗ.)

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੍ӝ

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ё୓ оઉয়ӝ

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೙ఠ݂җ ੿۳

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߸҃ ঌܿ (Java)

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߸҃ػ ё୓о ੋ੗۽ ੹׳ؽ.

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߸҃ ঌܿ (Swift)

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iOS੄ ಴ળ Key-Value Observation

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߸҃ ঌܿ (ࢲߡ)

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ࢲߡ ੉߮౟ ೩ٜ۞ܳ ٜ݅ ٸח ؀ѐ ష௾ਸ ੉ਊ೧ࢲ ۽Ӓੋ.

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ߑӘ ݅ٚ admin_user৬ NOTIFIER_PATH ҃۽, ࢚ױ੄ ௒ߔਵ۽ ܻझցܳ ١۾.

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change_event੄ ׮নೠ ࣘࢿਸ ੉ਊ.

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Realm ੋझఢझ

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ੌ۲੄ ؀࢚ ё୓.

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ੋؙझо ୶о, ࢏ઁ, ߸҃ ૘೤ਵ۽
 ࣁ޻ೞѱ ੹׳. Fine-grained notifications.

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Thank you [email protected] realm.io/kr [email protected]