{"id":108647,"date":"2023-05-21T12:49:09","date_gmt":"2023-05-21T10:49:12","guid":{"rendered":"https:\/\/prohoster.info\/?p=108647"},"modified":"2023-05-22T10:28:52","modified_gmt":"2023-05-22T08:28:52","slug":"paypal-otkryl-kod-subd-junodb","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/paypal-otkryl-kod-subd-junodb","title":{"rendered":"PayPal ha open source il codice del database JunoDB","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

L'azienda PayPal ha reso disponibili i codici sorgente del database resiliente JunoDB, che gestisce i dati nel formato chiave-valore. Il sistema \u00e8 stato progettato fin dall'inizio con un occhio alla massima sicurezza, scalabilit\u00e0 orizzontale, resilienza e capacit\u00e0 di gestire centinaia di migliaia di connessioni simultanee con ritardi prevedibili. In PayPal, praticamente tutti i servizi, dall'accesso degli utenti all'elaborazione delle transazioni finanziarie, dipendono da JunoDB. Il codice del progetto \u00e8 scritto in linguaggio Go (la libreria client \u00e8 in Java) e viene distribuito con licenza Apache 2.0. Durante lo sviluppo futuro, saranno accettate correzioni, miglioramenti e modifiche dalla comunit\u00e0. <\/p>\n

L'architettura di JunoDB si basa sull'utilizzo di un bilanciatore di carico che riceve le richieste dalle applicazioni client e le distribuisce tra i server proxy, che accedono contemporaneamente a un gruppo server<\/a> di archiviazione durante l'elaborazione della richiesta. Ogni server proxy stabilisce connessioni contemporaneamente con tutti server<\/a> memorizza e reindirizza le richieste a un gruppo di server di archiviazione in base all'indice di partizionamento, che \u00e8 conservato in un sistema di archiviazione distribuito di configurazione etcd.

\"PayPal<\/center> <\/p>\n

I dati sono partizionati e associati ai nodi di archiviazione utilizzando l'hashing, il che riduce il movimento dei dati quando i nodi nel cluster aumentano o diminuiscono. Per garantire l'affidabilit\u00e0, ogni porzione di dati \u00e8 replicata su pi\u00f9 nodi di archiviazione, consentendo di mantenere le informazioni anche in caso di guasto di singoli server. \u00c8 supportata la creazione di archivi distribuiti geograficamente, in cui i gruppi di nodi sono situati in diversi data center.

\"PayPal<\/center> <\/p>\n

I dati sono memorizzati nei nodi di archiviazione in memoria volatile o in uno storage locale basato sulla libreria RocksDB. Quando i dati sono archiviati in modo permanente, vengono conservati in forma crittografata (la chiave di crittografia pu\u00f2 essere definita sia dal cliente che impostata a livello di proxy).

\"PayPal<\/center> <\/p>\n

Per accedere al database dalle applicazioni, viene fornita una libreria client che offre un'API per applicazioni scritte in Java, Go e C++. La parte client \u00e8 stata semplificata al massimo, mentre la logica complessa e le configurazioni sono state spostate, dove possibile, sul lato del DBMS. L'interazione tra il client e il bilanciatore di carico o il proxy avviene tramite un canale di comunicazione crittografato. Per gestire e inviare richieste \u00e8 possibile utilizzare un'interfaccia da riga di comando, che replica tutte le funzionalit\u00e0 dell'API client. <\/p>\n

Il sistema \u00e8 stato progettato per gestire richieste con latenze basse e prevedibili. Ad esempio, un cluster composto da tre nodi di archiviazione e un proxy, costituito da ambienti n1-highmem-32 (32 CPU Intel Xeon 2.30GHz, 214G RAM e 450G di archiviazione SSD), \u00e8 riuscito a fornire latenze fisse non superiori a 2,5 ms nel 95% dei casi e 16 ms nel 99% durante il trattamento di 200.000 connessioni TLS simultanee e un flusso di 15.000 richieste al secondo. (Nel caso di 3.000 connessioni simultanee e un flusso di 80.000 richieste al secondo, le latenze non hanno superato i 6 ms nel 95% dei casi e 15 ms nel 99%). In PayPal, i servizi basati su JunoDB gestiscono circa 350 miliardi di richieste al giorno.

\"PayPal<\/center>
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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Questo sistema \u00e8 stato originariamente sviluppato con un forte focus sulla sicurezza, scalabilit\u00e0 orizzontale, resistenza ai guasti e capacit\u00e0 di gestire centinaia di migliaia di connessioni simultanee con ritardi prevedibili. In PayPal, praticamente tutti i servizi, dall'accesso degli utenti all'elaborazione delle transazioni finanziarie, si basano su JunoDB. Il codice del progetto \u00e8 scritto in linguaggio Go.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/paypal-otkryl-kod-subd-junodb","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47PayPal \u043e\u0442\u043a\u0440\u044b\u043b \u043a\u043e\u0434 \u0421\u0423\u0411\u0414 JunoDB | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f PayPal \u043e\u0442\u043a\u0440\u044b\u043b\u0430 \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0442\u0435\u043a\u0441\u0442\u044b \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0439 \u0421\u0423\u0411\u0414 JunoDB, \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u0443\u044e\u0449\u0435\u0439 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 \u043a\u043b\u044e\u0447-\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435. \u0421\u0438\u0441\u0442\u0435\u043c\u0430 \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u0441\u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0441 \u043e\u0433\u043b\u044f\u0434\u043a\u043e\u0439 \u043d\u0430 \u0432\u044b\u0441\u043e\u043a\u0443\u044e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c, \u0433\u043e\u0440\u0438\u0437\u043e\u043d\u0442\u0430\u043b\u044c\u043d\u0443\u044e \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u0443\u0435\u043c\u043e\u0441\u0442\u044c, \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0441\u0442\u044c \u0438 \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0442\u044c \u0441\u043e\u0442\u043d\u0438 \u0442\u044b\u0441\u044f\u0447 \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0439 \u0441 \u043f\u0440\u0435\u0434\u0441\u043a\u0430\u0437\u0443\u0435\u043c\u044b\u043c\u0438 \u0437\u0430\u0434\u0435\u0440\u0436\u043a\u0430\u043c\u0438. \u0412 PayPal \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0432\u0441\u0435 \u0441\u0435\u0440\u0432\u0438\u0441\u044b, \u043e\u0442 \u0432\u0445\u043e\u0434\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0434\u043e \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0444\u0438\u043d\u0430\u043d\u0441\u043e\u0432\u044b\u0445 \u0442\u0440\u0430\u043d\u0437\u0430\u043a\u0446\u0438\u0439, \u0437\u0430\u0432\u044f\u0437\u0430\u043d\u044b \u043d\u0430 JunoDB. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 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