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PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
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A PostgreSQL "schema" is roughly the same as a MySQL "database". Having many databases on a PostgreSQL installation can get problematic; having many schemas will work with no trouble. So you definitely want to go with one database and...
What does a Ajax call response like 'for (;;); { json data }' mean? [duplicate]
...g as simple and serious as failing to escape data inserted into an HTML or SQL template or something as intricate and subtle as using eval (sometimes inefficient and arguably insecure) or JSON.parse (a compliant but not universally implemented extension) instead of a "known good" JSON decoder, it is...
X-Frame-Options Allow-From multiple domains
...Web.HttpContext.Current.Request.UrlReferrer.Authority;
// SQL.Log(System.Web.HttpContext.Current.Request.RawUrl, System.Web.HttpContext.Current.Request.UrlReferrer.OriginalString, refAuth);
if (IsHostAllowed(refAuth))
{
BrowserInf...
Why must we define both == and != in C#?
...plement three-valued logic (i.e. null). In cases like that - ANSI standard SQL, for instance - the operators can't simply be negated depending on the input.
You could have a case where:
var a = SomeObject();
And a == true returns false and a == false also returns false.
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How can I store my users' passwords safely?
...l be much safer if you used parameterized queries instead of concatenating SQL statements. And the salt should be unique for each user and should be stored along with the password hash.
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impr...
How to fix: “UnicodeDecodeError: 'ascii' codec can't decode byte”
...but usually require a little configuration. Always use Unicode strings for SQL queries.
MySQL
In the connection string add:
charset='utf8',
use_unicode=True
E.g.
>>> db = MySQLdb.connect(host="localhost", user='root', passwd='passwd', db='sandbox', use_unicode=True, charset="utf8")
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Does Parallel.ForEach limit the number of active threads?
...de that failed to set a limit and spawned 200+ threads thereby popping the SQL connection pool.. I recommend setting the Max DOP for any work that cannot be trivially reasoned about as being explicitly CPU bound.)
– user2864740
Apr 11 '17 at 23:31
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What is the best way to prevent session hijacking?
...ou are vulnerable to session fixation, or your session ID storage is weak (SQL injection?), SSL will be no improvement at all.
– Calimo
Jan 22 '12 at 18:15
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Why do I need Transaction in Hibernate for read-only operations?
...actions can be optimized by DBs, but this of course is DB specific. E.g. MySQL added support for this only in InnoDB starting from 5.6.4 version.
If you're not using JDBC directly, but rather an ORM, that might be problematic. For instance Hibernate community says that working outside of transaction...
廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...没有这种情况，那么建议不要启动，启动 了会降低NFS的性能：/sbin/rpc.lockdecho “/sbin/rpc.lockd” >>/etc/rc.local
5安装Heartbeat
5.1 下载安装包
由于实验机器没法上网 从网上下载Heartbeat的安装包并使用Xftp工具上传到share1和2
下...