AIX Down Under

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Make way for rootvg!

AnthonyEnglish Visits (6960)

&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;!-- @page { margin: 2cm } P { margin-bottom: 0.21cm } A:link { so-language: zxx } --&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; TRACING YOUR ROOTS Every AIX system has a volume group (a logical group of disks) called rootvg, which is created automatically at the time you install AIX. The rootvg may be made up of one or several physical disks or virtual disks (SAN LUNs, Logical volumes on the VIO Server). Whatever "disks" make... [More]

Tags: file_systems paging_space logical_volume_manager chfs delivering_baby volume_group obstetrics_down_under multibos dump_devices size rootvg lvm aix

df by volume group (saving those precious fingertips)

AnthonyEnglish Comment (1) Visits (5347)

As you know, you can display all the file systems using the AIX df command . But what if you want to run df just for the file systems in a single volume group? You may want to identify the culprites filling up a LUN, for example. It's surprisingly simple to do df by vg . It's a matter of combining two commands: lsvgfs and df. Command 1: lsvgfs You can use lsvgfs to list all the file systems belonging to a volume group . # lsvgfs rootvg &amp;amp;amp;amp;amp;amp;amp;lt;!-- @page { margin: 2cm } P { margin-bottom: 0.21cm... [More]

Tags: aix lsvgfs volume_group df grep file_systems awk

Could paging space increases be simplified?

AnthonyEnglish Comments (6) Visits (4231)

On AIX, changing a file system size is a breeze. Here's how to increase the /myfs file system by 1 GB: chfs -a size=+1G /myfs And you can decrease it - on the fly - using a minus sign. Let's reduce it by 750 MB: chfs -a size=-750M /myfs You can leave AIX to work out how that rounds up or down in terms of the underlying logical volume's logical partitions. It's all handled under the covers by the chfs command . With paging space, it's a little less user-friendly. To increase paging space (which, let's face it, is... [More]

Tags: paging_space file_systems

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Make way for rootvg!

df by volume group (saving those precious fingertips)

Could paging space increases be simplified?