ChuckLu - 博客园

2019年1月8日

摘要： 5.2 PBKDF2 PBKDF2 applies a pseudorandom function (see Appendix B.1 for an example) to derive keys. The length of the derived key is essentially unbou 阅读全文

posted @ 2019-01-08 17:56 ChuckLu 阅读(772) 评论(0) 推荐(0)

git checkout cannot stat permission denied

摘要： https://stackoverflow.com/questions/5970879/git-rebase-error-cannot-stat-file-permission-denied 退出visual studio之后仍然不行尝试退出everything，发现可以了。问题分析，第一次进行阅读全文

posted @ 2019-01-08 15:41 ChuckLu 阅读(3015) 评论(0) 推荐(0)

2019年1月7日

uniqueidentifier in SQL becomes lower case in c#

摘要： https://stackoverflow.com/questions/16938151/uniqueidentifier-in-sql-becomes-lower-case-in-c-sharp If you using Entity Framework, uniqueidentifier dat 阅读全文

posted @ 2019-01-07 15:22 ChuckLu 阅读(444) 评论(0) 推荐(0)

2019年1月4日

Windows batch: call more than one command in a FOR loop?

摘要： https://stackoverflow.com/questions/2252979/windows-batch-call-more-than-one-command-in-a-for-loop Using & is fine for short commands, but that single 阅读全文

posted @ 2019-01-04 10:01 ChuckLu 阅读(274) 评论(0) 推荐(0)

2019年1月2日

How can I delete using INNER JOIN with SQL Server?

摘要： How can I delete using INNER JOIN with SQL Server? You need to specify what table you are deleting from, here is a version with an alias: DELETE w FRO 阅读全文

posted @ 2019-01-02 18:19 ChuckLu 阅读(514) 评论(0) 推荐(0)

BufferingForwardingAppender in log4net

摘要： https://blog.csdn.net/szx1999/article/details/50073857 7. 写日志会影响系统性能吗？写日志必然是会消耗一定资源的，而RollingFileAppender也不是线程安全的。为了减小log4net影响系统性能的嫌疑，我们加入lockingMod 阅读全文

posted @ 2019-01-02 10:41 ChuckLu 阅读(1018) 评论(0) 推荐(1)

lockingModel in log4net 日志文件不能被其他进程写入

摘要： How do I get multiple process to log to the same file? Before you even start trying any of the alternatives provided, ask yourself whether you really 阅读全文

posted @ 2019-01-02 10:23 ChuckLu 阅读(2374) 评论(0) 推荐(1)

rollingstyle in log4net

摘要： RollingFileAppender.RollingStyle Property The default rolling style is Composite. When set to Once this appender's AppendToFile property is set to fal 阅读全文

posted @ 2019-01-02 10:06 ChuckLu 阅读(1639) 评论(0) 推荐(0)

2018年12月26日

sql server update时，默认使用是行锁还是表锁？

摘要： https://bbs.csdn.net/topics/120000749 http://www.cnblogs.com/s021368/articles/2148659.html 问题： udpate a set column1 = 1 where idx = 1 sqlserver 执行upda 阅读全文

posted @ 2018-12-26 11:43 ChuckLu 阅读(11395) 评论(2) 推荐(0)

multi update caused deadlock problem

摘要： https://social.msdn.microsoft.com/Forums/sqlserver/en-US/dba45618-1d64-4661-891d-74cab09dddf1/deadlock-while-running-multiple-update-statements?forum= 阅读全文

posted @ 2018-12-26 11:18 ChuckLu 阅读(328) 评论(0) 推荐(0)

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