Infobright4.5版本相比4.0版本增加了一系列的特性。我来详解下几个重要的提升。1.对系统默认的LOG输出级别可以动态调整了。在之前要是想调整这个默认级别,就得
Infobright 4.5 版本相比 4.0 版本增加了一系列的特性。 我来详解下几个重要的提升。
1. 对系统默认的LOG 输出级别可以动态调整了。
在之前要是想调整这个默认级别,就得在配置文件里面(brighthouse.ini)里设置好,完了重启infobright server。 这样很不方便,不能及时的查看相关SQL详细执行计划以及对系统资源的详细占用。
IB>show variables like '%control%'; +---------------------------------+-------+ | Variable_name | Value | +---------------------------------+-------+ | brighthouse_ini_controlmessages | 5 | +---------------------------------+-------+ 1 row in set (0.00 sec) IB>set global brighthouse_ini_controlmessages=1; Query OK, 0 rows affected (0.00 sec) IB>show variables like '%control%'; +---------------------------------+-------+ | Variable_name | Value | +---------------------------------+-------+ | brighthouse_ini_controlmessages | 1 | +---------------------------------+-------+ 1 row in set (0.00 sec)此处说明下, 这个值越大,香港空间,执行计划日志里面涉及到的信息就越全面。
2. 重新整理知识网格。
用过infobright的人可能都知道,infobright有一种特有的类似行式数据库的索引结构,自己内部的名称叫知识网格,一直常驻内存,以提高查询效率。 我们知道,当我们对表本身的数据进行多次的增删改等等写入操作后,知识网格里面的信息也变的不完整,这样就会严重的影响到查询性能,因为此时必须读取磁盘完了解压才能得到相关的结果。 在4.0以及之前的版本,想要重新生成一个完整的知识网格,就必须重新导入数据, 这个操作是蛮烦人的,香港空间, 而且浪费时间,浪费资源。 从4.5版本开始,可以动态调整只是网格了。
这里我只重置了TEST库的知识网格。ICM是infobright自带的一个强大的工具,可以做很多事情, 这里我们只演示重置只是网格,其他的自己去开发吧。
3. DLP校验规则的更改。
DLP,也就是分布式导入工具,服务器空间,每小时可以达到3TB导入速度的强大工具。 原来字符校验规则只支持*_bin, 现在是所有校验规则都支持了。 也就是说,我们不必要去分别更改每张表的校验规则来适应DLP了。
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