{"id":104672,"date":"2022-07-19T15:36:50","date_gmt":"2022-07-19T13:36:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-grafo-orientirovannoj-subd-nebula-graph-3-2"},"modified":"2022-07-19T15:36:50","modified_gmt":"2022-07-19T13:36:50","slug":"vypusk-grafo-orientirovannoj-subd-nebula-graph-3-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/vypusk-grafo-orientirovannoj-subd-nebula-graph-3-2","title":{"rendered":"Lansarea sistemului de gestionare a bazelor de date grafice Nebula Graph 3.2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A fost lansat\u0103 versiunea 3.2 a SGBD-ului open-source Nebula Graph, destinat stoc\u0103rii eficiente a unor seturi mari de date interconectate, form\u00e2nd un grafic ce poate con\u021bine miliarde de noduri \u0219i trilioni de leg\u0103turi. Proiectul este scris \u00een C++ \u0219i este distribuit sub licen\u021ba Apache 2.0. Bibliotecile client pentru accesarea SGBD-ului sunt disponibile pentru limbajele Go, Python \u0219i Java.     <\/p>\n<p>SGBD-ul utilizeaz\u0103 o arhitectur\u0103 distribuit\u0103 f\u0103r\u0103 separarea resurselor (shared-nothing), ceea ce implic\u0103 lansarea unor procese independente \u0219i autonome de procesare a cererilor graphd \u0219i a proceselor de stocare storaged. Orchestrarea migra\u021biei datelor \u0219i furnizarea de meta-informa\u021bii despre grafic sunt gestionate de un serviciu meta. Pentru a asigura coeren\u021ba datelor, se utilizeaz\u0103 un protocol bazat pe algoritmul RAFT.      <\/p>\n<p>Caracteristici principale ale Nebula Graph:  <\/p>\n<ul>\n<li class=\"l\"> Asigurarea securit\u0103\u021bii prin acordarea accesului numai utilizatorilor autentifica\u021bi, iar permisiunile acestora sunt stabilite printr-un sistem de gestionare a accesului bazat pe roluri (RBAC).    <\/li>\n<li class=\"l\"> Posibilitatea de conectare a diferitelor tipuri de motoare de stocare. Suport pentru extinderea limbajului de formare a cererilor cu algoritmi noi.    <\/li>\n<li class=\"l\"> Asigurarea \u00eent\u00e2rzierilor minime la citirea sau scrierea datelor \u0219i men\u021binerea unei l\u0103\u021bimi de band\u0103 ridicate. \u00cen timpul test\u0103rii pe un cluster format dintr-un nod graphd \u0219i trei noduri storaged cu o baz\u0103 de date de 632 GB, incluz\u00e2nd un grafic cu 1,2 miliarde de v\u00e2rfuri \u0219i 8,4 miliarde de muchii, \u00eent\u00e2rzierile au fost la nivelul c\u00e2torva milisecunde, iar l\u0103\u021bimea de band\u0103 a ajuns p\u00e2n\u0103 la 140.000 de cereri pe secund\u0103.    <\/li>\n<li class=\"l\"> Scalabilitate liniar\u0103.  <\/li>\n<li class=\"l\"> Limbaj de cereri asem\u0103n\u0103tor SQL, suficient de puternic \u0219i u\u0219or de \u00een\u021beles. Sunt acceptate opera\u021bii precum GO (parcurgerea bidirec\u021bional\u0103 a nodurilor graficului), GROUP BY, ORDER BY, LIMIT, UNION, UNION DISTINCT, INTERSECT, MINUS, PIPE (utilizarea rezultatului de la cererea anterioar\u0103). Se suport\u0103 indec\u0219i \u0219i variabile definite de utilizator.    <\/li>\n<li class=\"l\"> Asigurarea disponibilit\u0103\u021bii ridicate \u0219i a rezisten\u021bei la defec\u021biuni.    <\/li>\n<li class=\"l\"> Suport pentru crearea de instantanee cu un e\u0219antion al st\u0103rii bazei de date pentru a facilita realizarea copiilor de rezerv\u0103.  <\/li>\n<li class=\"l\"> Preg\u0103tit pentru aplicare industrial\u0103 (deja folosit \u00een infrastructura companiilor JD, Meituan \u0219i Xiaohongshu).  <\/li>\n<li class=\"l\"> Posibilitatea de a schimba schema de stocare \u0219i de a actualiza datele f\u0103r\u0103 oprirea sau influen\u021barea opera\u021biunilor \u00een curs.    <\/li>\n<li class=\"l\"> Suport TTL pentru limitarea duratei de via\u021b\u0103 a datelor.  <\/li>\n<li class=\"l\"> Comenzi pentru gestionarea set\u0103rilor \u0219i gazdelor de stocare.  <\/li>\n<li class=\"l\"> Instrumente pentru gestionarea lucr\u0103rilor \u0219i planificarea desf\u0103\u0219ur\u0103rii acestora (\u00een prezent, sunt acceptate lucr\u0103rile COMPACT \u0219i FLUSH).  <\/li>\n<li class=\"l\"> Opera\u021bii de c\u0103utare a celei mai scurte c\u0103i \u0219i a c\u0103ii complete \u00eentre nodurile date.  <\/li>\n<li class=\"l\"> Interfa\u021b\u0103 OLAP pentru integrarea cu platforme externe de analiz\u0103.  <\/li>\n<li class=\"l\"> Utilitare pentru importul de date din fi\u0219iere CSV sau din Spark.  <\/li>\n<li class=\"l\"> Export de metrici pentru monitorizare utiliz\u00e2nd Prometheus \u0219i Grafana.    <\/li>\n<li class=\"l\"> Interfa\u021b\u0103 web Nebula Graph Studio pentru vizualizarea opera\u021biunilor cu grafuri, navigarea prin grafuri, proiectarea schemei de stocare \u0219i \u00eenc\u0103rcarea datelor.      <\/ul>\n<p>\u00cen noua versiune:  <\/p>\n<ul>\n<li class=\"l\"> Ad\u0103ugat\u0103 suportul pentru func\u021bia extract() pentru extragerea unui substring corespunz\u0103tor unei expresii date.\n<li class=\"l\"> Optimizate set\u0103rile din fi\u0219ierul de configurare.\n<li class=\"l\"> Ad\u0103ugate reguli de optimizare pentru eliminarea operatorului inutil AppendVertices \u0219i dezactivarea aplic\u0103rii filtrelor pe muchii \u0219i noduri.\n<li class=\"l\"> Reduce cantitatea de date copiate pentru opera\u021bia JOIN, precum \u0219i pentru operatorii Traverse \u0219i AppendVertices.\n<li class=\"l\"> Optimizat\u0103 performan\u021ba SHORTEST PATH \u0219i SUBGRAPH.\n<li class=\"l\"> \u00cembun\u0103t\u0103\u021bit\u0103 distribu\u021bia memoriei (utilizat Arena Allocator).      <\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57522\">opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0421\u0423\u0411\u0414 Nebula Graph 3.2, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043a\u0440\u0443\u043f\u043d\u044b\u0445 \u043d\u0430\u0431\u043e\u0440\u043e\u0432 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u043c\u0435\u0436\u0434\u0443 \u0441\u043e\u0431\u043e\u0439 \u0434\u0430\u043d\u043d\u044b\u0445, \u043e\u0431\u0440\u0430\u0437\u0443\u044e\u0449\u0438\u0445 \u0433\u0440\u0430\u0444, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u0435\u0442 \u043d\u0430\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u0442\u044c \u043c\u0438\u043b\u043b\u0438\u0430\u0440\u0434\u044b \u0443\u0437\u043b\u043e\u0432 \u0438 \u0442\u0440\u0438\u043b\u043b\u0438\u043e\u043d\u044b \u0441\u0432\u044f\u0437\u0435\u0439. \u041f\u0440\u043e\u0435\u043a\u0442 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0. \u041a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0434\u043b\u044f \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043a \u0421\u0423\u0411\u0414 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u0434\u043b\u044f \u044f\u0437\u044b\u043a\u043e\u0432 Go, Python \u0438 Java. \u0412 \u0421\u0423\u0411\u0414 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u0430\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-104672","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0421\u0423\u0411\u0414 Nebula Graph 3.2, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043a\u0440\u0443\u043f\u043d\u044b\u0445 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