All ZFS users are familiar with ‘zpool iostat’ command, however, it is not easily translated into Linux ‘iostat’ command. Using large pools with many disks will result in a mess, where it’s hard to identify which disk is which, and going to a translation table from time to time, to identify a suspect slow disk….
This is a tricky one. In order to resize /boot, which is, commonly the first partition, you need to push forward the beginning of the next partition. This is not an easy task, especially if you are not using LVM – then you have to use external partitioning modification tools, like PQMagic (if it still…
You can find bazillion sites explaining Linux LVM, however, I am preparing for my next article, about partition resize for the advanced user, and LVM deep understanding is required, so I have decided to explain some of the internals of LVM for the advanced user. This explains the how it is built more than the…
After major investigations around, I came to the conclusion that a full guide describing the procedure required for online disk resize on Linux (especially – expanding disks). I have created a guide for RHEL5/6/7/8 (works the same for Centos or OEL or ScientificLinux – RHEL-based Linux systems) which takes into account the following four scenarios:…
Linux LVM is a wonderful thing. It is scalable, flexible, and truly, almost enterprise-class in every details. It lacks, of course, at IO performance for LVM snapshots, but this can be worked-around in several creative ways (if I haven’t shown here before, I will sometime). What it can’t do is dealing with a mixture of…
