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HomeDatabaseMysql Tutorial使用Smitty进行AIX上Logical Volume创建拓展

在AIX中进行各种参数命令配置,smitty是一个相当不错的工具选择。Smitty是一个运行在AIX上的辅助操作工具,将各种操作系统软硬件

Linux、AIX是我们运维环境中最常见的服务器操作系统。在理想情况下,配置好的应用程序是在一个稳定循环环境下运行的。一般不会发生过多的配置更改情况。但是,如果在规划期间没有合理进行各类型资源的配置(特别是存储),往往就需要运维人员的后期介入调整。
 
在AIX中进行各种参数命令配置,smitty是一个相当不错的工具选择。Smitty是一个运行在AIX上的辅助操作工具,将各种操作系统软硬件配置命令,转化为一系列目录表单样式进行操作。这样很好地减少了我们操作系统的复杂程度,也避免了误操作的出现。
 
本文主要介绍如何在AIX上使用Smitty进行逻辑卷创建和拓展管理。

 

1、LVM背景介绍

 

在AIX中,磁盘管理策略是一种Logical Volume Management的方法。简单的说,就是将存储划分为物理卷(Phsical Volume)、逻辑卷组(Logical Volume Group)和逻辑卷(Logical Volume)三个层次进行管理。
 
物理卷是我们最直观的磁盘或者分区,操作系统中可能有多种存储设备。在LVM中,都将其视为物理卷对象(PV)。

若干物理卷可以划归到一个逻辑组织中进行统一管理,这就是逻辑卷组(Logical Volume Group)。LVG类似于一个存储池,无论或大或小的PV被纳入到LVG中,都是进行统一管理。对使用者而言,LVG是一个统一的虚拟“存储”。在LVG内部,数据存储是以Physical Partition(PP)的方式进行划分管理。所以我们在度量LVM的容量的时候,PP个数是一个重要指标。
 
LVG是一个存储池对象,并不能直接作为存储。我们需要在LVG中划分出若干块进行使用,这就是LV(Logical Volume)。LV有自己的度量单位,和PP类似,,成为LP(Logical Partition)。通常PP和LP是相同的。
 
创建LV之后,还要将其和特定目录进行关联,这个过程成为加载mount。下面是一个比较典型的LV存储结构。

 

[root@TESTMIS:/]#df -g

Filesystem    GB blocks      Free %Used    Iused %Iused Mounted on

/dev/hd4          4.00      3.08  24%    10688    2% /

/dev/hd2          5.00      2.81  44%    47602    7% /usr

/dev/hd9var        0.62      0.07  90%    11505    40% /var

/dev/hd3          10.00      3.67  64%    1948    1% /tmp

/dev/hd1          0.12      0.12    1%        5    1% /home

/dev/hd11admin      0.12      0.12    1%        5    1% /admin

/proc                -        -    -        -    -  /proc

/dev/hd10opt      0.50      0.25  50%    8980    14% /opt

/dev/livedump      0.25      0.25    1%        4    1% /var/adm/ras/livedump

 

File system中对应的各种磁盘,就是LV逻辑卷对象。使用LVM方法有很多好处,其中最大的就是可以动态进行空间拓展。比如,原有的LVG空间不足,可以直接加入一块新盘到LVG中,之后拓展extend逻辑卷空间。
 
 

2、环境介绍

 

下面我们就在AIX 6.1环境下进行创建和拓展试验。

 

[root@TESTMIS:/]#oslevel

6.1.0.0

 

当前系统中已经包括了两个逻辑卷组,分别为默认操作系统rootvg和testmisvg。

 

[root@TESTMIS:/]#lsvg

rootvg

testmisvg

 

[root@TESTMIS:/]#lspv

hdisk0          00f7fcc82bdccfa1                    rootvg          active     

hdisk1          00f7fcc8839250c4                    testmisvg      active     

(篇幅原因,有省略……)

 

各个LV对应AIX目录结构,都有自己的空间限额和使用情况。

 

[root@TESTMIS:/]#df -g

Filesystem    GB blocks      Free %Used    Iused %Iused Mounted on

/dev/hd4          4.00      3.08  24%    10685    2% /

/dev/hd2          5.00      2.81  44%    47602    7% /usr

/dev/hd9var        0.62      0.07  90%    11504    40% /var

/dev/hd3          10.00      3.67  64%    1948    1% /tmp

/dev/hd1          0.12      0.12    1%        5    1% /home

(篇幅原因,有省略……)

 

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