Wandering Thoughts archives

2022-07-31: Using Prometheus's recent '@ end()' PromQL feature to reduce graph noise
2022-07-30: Python is my default choice for scripts that process text
2022-07-29: How systemd names instances of templated socket service units
2022-07-28: Print based debugging and infrequent developers
2022-07-27: What ZFS 'individual' and 'aggregated' IO size statistics mean
2022-07-26: To be fully useful, Prometheus histograms want their cumulative sums
2022-07-25: ZFS pool IO statistics (and vdev statistics) are based on physical disk IO
2022-07-24: Some pragmatic issues with Linux kernel mode setting on servers
2022-07-23: The state of getting per-pool IO statistics in ZFS on Linux as of version 2.1
2022-07-22: I've now used Linux nftables for firewall rules and it went okay
2022-07-21: You can sensibly move or copy Prometheus's database with rsync
2022-07-20: A brute force solution to nested access permissions in Apache
2022-07-19: We won't be sending systemd logs to Grafana Loki in JSON format
2022-07-18: Grafana Loki and what can go wrong with label cardinality
2022-07-17: An assortment of timestamp formats found in our (Unix) logs
2022-07-16: How to get (or recognize) a common Unix log timestamp format in things
2022-07-15: 'iptables -L' doesn't show you interface matches on rules by default
2022-07-14: IMAP servers can have significant imbalances between disk and network IO
2022-07-13: How Unix didn't used to support '#!', a brief history
2022-07-12: Getting the names of your Linux software RAID devices to stick
2022-07-11: It feels surprisingly good to block Bingbot from my blog front page
2022-07-10: My distrust of multi-factor authentication's account recovery story
2022-07-09: The Linux load average does mean something (although maybe not much)
2022-07-08: Larger backup systems often operate in multiple stages
2022-07-07: DKIM signature types (algorithms) that we see (as of July 2022)
2022-07-06: My current mixed views on the Linux kernel netconsole
2022-07-05: A surprise: you can only have one Linux kernel serial console
2022-07-04: Why an empty (executable) file is generally true in Unix
2022-07-03: Filesystems versus general tree structures
2022-07-02: Why reproducible machines didn't used to be a priority (I think)
2022-07-01: A quiet shift in what tech people build for their blogs

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