I have had a problem with RPI Zero. The system was working fine, and then it did not. I am using Raspbery Linux (Debian-based) with kernel 5.10.17+. Once a while (usually with network load) the system loses connectivity. Everything seems to be fine, if you have a serial/USB console there, but the wireless network fails….
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….
I have had an interesting experience with HPE servers, where the BIOS was defined to allow max performance (in contrast to ‘balanced’ mode), but still – the CPU was not at max all the time. While we generally, strive to a greener computing, when having low-latency workload, we expect a deterministic performance. We want our…
With the update to version 8 (or, if to be accurate, according to common documentations, 8.3 and above), VNC configuration has had a major overhaul, and it is entirely different. Most documentations will refer to using ‘gnome’ as the desktop manager, however – if you want something lightweight with minimal impact (both package-wise and performance-wise),…
This is a problem which bugs the Internet. Many solutions were suggested. All of them work sometimes (like making sure that the permissions on the private/public SSH key files are correct). One solution which never gets mentioned is about DNS. When attempting login to a remote server, the server attempts to resolve the connecting address…
ZFS has some magical features, comparable to NetApp’s WAFL capabilities. One of the less-used on is the ZFS send/receive, which can be utilised as an engine below something much like NetApp’s SnapMirror or SnapVault. The idea, if you are not familiar with NetApp’s products, is to take a snapshot of a dataset on the source,…
