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UCloudStor 统一存储

UCloudStor 统一存储为云而生,基于通用服务器构建统一存储层,为应用提供块、对象及文件存储服务,打破数据调度壁垒;同时提供多种应用接口,适用于虚拟化、云计算、大数据、物联网及企业应用等使用场景。纯软件定义存储系统,采用领先的全分布式架构,无单点故障,具有高弹性和高可靠性,性能和容量可横向扩展,分层分级存储数据,并可自定义存储系统的性能、容量及数据保护能力。

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EF codefirst用linq to sql好还是直接sql语句好?

回答:Linq是一个范围比较大的概念,它其中不单单只有linq to sql,还有相应的linq to xml等等。所以拿linq 与SQL语句相比,没有可比性的。但如果拿linq to sql相比的话,与SQL还是有很大的可比性的。一般情况下,你必须要明白你所指的效率是哪一方面?是数据库执行效率?还是整体成品软件运行效率?还是开发效率?开发效率上linq to sql显然要比SQL的效率要高很多,我们...

Luosunce | 879人阅读

本地安装usdp报错Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

问题描述:日志信息 如下,麻烦大佬帮忙看下[root@hdfs2 udp]# tail -f udp-server-info.2022-10-10.log 2022-10-10 17:05:42 [main] INFO  cn.ucloud.udp.UDPServerApplication - The following profiles are active: server2022-10-10 17:05:59 [main] INFO...

17693186804 | 808人阅读

AsyncTask - No thread-bound request found

问题描述:[udp-717] ERROR cn.ucloud.udp.async.task.AbstractTask - 2022-11-15 15:56:00 [AsyncTask] java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing ...

303187999 | 1675人阅读

hbase shell list 命令执行报错。HADOOP 并未处于安全模式下

问题描述:[hadoop@usdp01 ~]$ hbase shellSLF4J: Class path contains multiple SLF4J bindings.SLF4J: Found binding in [jar:file:/opt/usdp-srv/srv/udp/2.0.0.0/hdfs/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]...

13283826897 | 754人阅读

USDP2.X社区版sqoop任务会调用TEZ并报无法初始化错误,有遇到过的么?

问题描述:2022-10-21 17:26:57`SEVERE`io.prometheus.jmx.shaded.io.prometheus.jmx.JmxCollector`io.prometheus.jmx.shaded.io.prometheus.jmx.JmxCollector collect`JMX scrape failed: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.NoIni...

peiheng | 673人阅读

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