B - Avoiding a disaster

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B - Avoiding a disaster

Description Percy likes to be punctual. So much so that he always keeps three watches with him, so that he can be sure exactly what the time is. However, Percy's having a bad day. He found out that one of his watches was giving the wrong time. What's…

HDU 4177 模拟时间问题

Avoiding a disaster Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 211 Accepted Submission(s): 101 Problem Description Percy likes to be punctual. So much so that he always keeps three watch…

track message forwards, avoiding request loops, and identifying the protocol capabilities of all senders along the request/response chain

https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html The TRACE method is used to invoke a remote, application-layer loop- back of the request message. The final recipient of the request SHOULD reflect the message received back to the client as the…

读Avoiding the Disk Bottleneck in the Data Domain Deduplication File System

最近在思考和实践怎样应用重复数据删除技术到云存储服务中.找了些论文来读,其中<Avoiding the Disk Bottleneck in the Data Domain Deduplication File System>是鼎鼎大名的李凯教授出品,读来收益匪浅. 论文主要内容 Data Domain的去重存储系统是商业上大获成功的产品,从产品的角度来讲非常完善,其架构图如下: 去重存储系统在数据存储和重建的过程中,都需要频繁地访问数据块的索引,即图中的Segment Index.为了降低成…

Disaster Recovery, High Availability, and Continuous Availability - What's the Difference?

Disaster Recovery, High Availability, and Continuous Availability - What's the Difference? Posted bydavid ton September 7, 2010 at 12:30am View Blog Last month I posted a video that gave a brief overview of how data replication is used for continuous…

Avoiding PostgreSQL database corruption

TL;DR: Don't ever set fsync=off, don't kill -9 the postmaster then deletepostmaster.pid, don't run PostgreSQL on network file systems. Reports of database corruption on the PostgreSQL mailing list are uncommon, but hardly rare. While a few data corru…