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One SVN repository or many?

... = none # or read or write auth-access = write password-db = /var/svn/conf/passwd authz-db = /var/svn/conf/authz realm = Repos1 SVN Repository File: /var/svn/conf/authz [groups] group_repos1_read = user1, user2 group_repos1_write = user3, user4 group_repos2_read = user1, user4 ### Global Right f...
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Can't su to user jenkins after installing Jenkins

... as root, enter su - jenkins Also, check in /etc/passwd that user jenkins is allowed to logon: there should be something like /bin/bash or /bin/sh, certainly not /bin/false at the end of the line. Hint: You don't use su and sudo at the same time. ...
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Comparison of full text search engine - Lucene, Sphinx, Postgresql, MySQL?

... the indexer process uses too. Scalability is where my knowledge is more sketchy - but it's easy enough to copy index files to multiple machines and run several searchd daemons. The general impression I get from others though is that it's pretty damn good under high load, so scaling it out across mu...
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SQL Server Management Studio, how to get execution time down to milliseconds

... Then you get a new tab which records the timings, IO data and rowcounts etc for (up to) the last 10 exections (plus averages!): share | improve this answer | follow ...
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一次「Too many open files」故障 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...务不可用故障,于是我惯性的判断应该还是 ES_HEAP_SIZE 的问题,不过登录服务器后发现日志里显示大量的「Too many open files」错误信息。 那么 ElasticSearch 设置的最大文件数到底是多少呢?可以通过 proc 确认: shell> cat /proc/<PID>/l...
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Is a LINQ statement faster than a 'foreach' loop?

...cts generally is going to add some marginal overheads (multiple iterators, etc). It still has to do the loops, and has delegate invokes, and will generally have to do some extra dereferencing to get at captured variables etc. In most code this will be virtually undetectable, and more than afforded b...
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What's the difference between compiled and interpreted language?

...g machine's machine code. So how's that different from a VM (python or JVM etc.) doing the same in case of an interpreted language? – qre0ct Jun 23 at 10:28 add a comment ...
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What exactly are “spin-locks”?

... When you use regular locks (mutexes, critical sections etc), operating system puts your thread in the WAIT state and preempts it by scheduling other threads on the same core. This has a performance penalty if the wait time is really short, because your thread now has to wait for ...
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Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升

...性能上更为出色,至于孰优孰劣是个仁者见仁智者见智的问题,鉴于多数Linux发行版均选择了Rsyslog,姑且让我随波逐流一次。 如果说Rsyslog有哪些缺点的话,那么兼容性无疑是很显眼的一个,不同版本之间的差异比较大,使用时...
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Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升

...性能上更为出色,至于孰优孰劣是个仁者见仁智者见智的问题,鉴于多数Linux发行版均选择了Rsyslog,姑且让我随波逐流一次。 如果说Rsyslog有哪些缺点的话,那么兼容性无疑是很显眼的一个,不同版本之间的差异比较大,使用时...