Viewing profile — amenonsen

Yes, isn't it great? As someone who knew that it's possible to reflash BIOS chips, but had no idea what equipment or process it would take to actually do so, I really appreciated t…

It doesn't make sense to you because everything in the comment you're replying to is wrong. Neither log shipping (copying WAL files one by one) nor streaming replication (sending a…

> In more recent versions there's "logical replication", which sort of "sends the queries" What it sends is not the queries, but a logical description of the changes to each row th…

FYI: I'm the author of the linked article, and I added a link to the image after it was posted here.

> Can you elaborate on how to identify the filename for a pipe in procfs or sysfs in a simple "echo hello | wc -c" example? You can see it under /proc/$pid/fd. For example, if you …

Sorry, I was wrong about the BSDs. FreeBSD's pipe.2 manpage clearly says that pipes are still bidirectional. https://www.freebsd.org/cgi/man.cgi?query=pipe&sektion=2 That said, it …

The slides are from 2011, not the code. Linux had pipes even in the v0.01 release from 1991, as the original article here mentions.

> So do modern Linux pipes work bi-directionally? No, they do not (nor on the modern BSD kernels, as far as I can tell). The Linux pipe(7) manpage says (under "Portability notes"):…

Yes, xv6 is great. The original post here already has a brief section on the code from xv6/pipe.c, which made for pleasant reading after I had just finished working my way through …

That commit is a fascinating illustration of how pipes allow a model of inter-process interaction that goes beyond what you can do with temporary files, as well as how much further…

Thanks for the link. That article seems to have a completely different focus (API rather than internals), but it's very nicely done.

Thank you very much for digging this up, and to all the other commenters here for the useful references.

> Manual formatters still send, even today, TTY Model 37 style input from 1969 to the manual pager Thanks, you are perfectly right. What I found charming was that the 3E pipe.2 man…

https://groups.google.com/forum/#!msg/alt.sysadmin.recovery/...

> Thanks for the awesome write-up. Glad you enjoyed it. :-) > I have considered doing something totally ridiculous like setting up a Raspberry Pi with a camera and machine vision s…

(I'm this person.) It so happens that the solar inverter I'm using right now doesn't provide a data connection that I could use to shut down the computers cleanly. But I should als…

I find it a bit strange that I have to download the LibreOffice "built-in" help package separately.

> If so, then maybe writing "Malayam" instead of "Malayalam" isn't too far wrong. No, it's very far wrong. (I'm a Malayali.)

Why Blake rather than Keccak? (Maybe I missed some reason why it's a good idea to avoid the latter.)

The big conceptual difference is that with WAL-E, all your backup code and configuration is on your Postgres server, whereas with Barman, it's all (or almost all) on your backup se…

Recent versions of Barman allow you to do WAL archiving without using an rsync/ssh-based archive_command. Instead, the backup server uses streaming replication via the standard pg_…

When I first saw the page (opened along with a bunch of other tabs from HN links), with its "Timeout error!" balloon and "Service disruption" headline, I thought it was a fancy err…

I am often dependent on a high-latency GPRS link, and the overhead of establishing a tunnel using OpenVPN or SSH (e.g. sshuttle) is prohibitive. OpenVPN is very likely to timeout b…

As someone who didn't really know what they were doing, I used NaCl recently to write a program to tunnel packets over UDP. I started by reading the NaCl source and all the introdu…