What is Hackers' Pub?

Hackers' Pub is a place for software engineers to share their knowledge and experience with each other. It's also an ActivityPub-enabled social network, so you can follow your favorite hackers in the fediverse and get their latest posts in your feed.

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Andromeda and Friends

This magnificent extragalactic skyscape looks toward the Andromeda Galaxy, the closest large spiral galaxy to the Milky Way. It also accomplishes a Messier catalog trifecta by including Andromeda, cataloged as Messier 31 (M31), along with Messier 32 (M32), and Messier 110 (M110) in the same telescopic field of view.

Image Credit & Copyright: Piotr Czerski



In this frame, M32 is just left of the Andromeda Galaxy's bright core with M110 below and to the right. M32 and M110 are both elliptical galaxies themselves and satellites of the larger spiral Andromeda. By combining 60 hours of broadband and narrowband image data, the deep telescopic view also reveals tantalizing details of dust lanes, young star clusters, and star-forming regions along Andromeda's spiral arms, and faint, foreground clouds of glowing hydrogen gas. For now, Andromeda and friends are some 2.5 million light-years from our own large spiral Milky Way.
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Another weekend, another set of ZFS scrubs of work's multiple terabytes of data sitting on a collection of consumer 4 TB SSDs (mirrored, we aren't crazy, and also we have backups). As usual there is not a checksum error to be seen. I think it's been years since any came up.

I accept that SSDs decay (we've had some die, of course) and random read errors happen, but our ZFS-based experience across both HDDs and SSDs has been that the rate is really low for us. Probably we're not big enough.

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성장하는 나를 위한 5가지 마음가짐

1. 실수는 배움의 기회로 여긴다
2. 작은 변화도 소중히 인정한다
3. 현재의 나를 있는 그대로 사랑한다
4. 내일을 향해 한 걸음씩 나아간다
5. 긍정적인 에너지로 삶을 마주한다

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