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Category: Data Centers

BFQ is coming…

LWN reports that the 4.11 merge window opens. Among other things, Maik Zumstrull reminds us, we get

The multiqueue block layer finally has support for I/O scheduling. That is useful in its own right, but the real news is that it enables the merging of the long-awaited BFQ I/O scheduler. That, says block maintainer Jens Axboe, “should be ready for 4.12”.

Of course, if you are on a LTS release of a Linux kernel, it’s unlikely that you will profit from this any time soon.

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Post like it is 2015

Following a great idea from their friends at GitLab, Soup.io loses all postings since 2015 because of malfunctioning backups. They write:

We had a big database crash, and the backups we had were corrupted.
The only working backup was from 2015.

Also, TIL soup.io still exists. Meanwhile, Gitlab posted a blameless postmortem. You can read it online, and they write:

Improving Recovery Procedures

[…]
9. Automated testing of recovering PostgreSQL database backups (#1102)
[…]

Does your database backup successfully restore? Are you sure? Are you testing this?

Remember these words of wisdom:

Nobody wants backup.
Everybody wants restore.
— Martin Seeger

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Using a blade center chassis to make Döner Kebap

I had the opportunity to play with a Blade Center Chassis with 16 Blades, each of them a Dual-E5 2690v4, so 56 threads (28 cores) times 16.

$ mkdir mprime; \
] cd mprime; \
] wget http://www.mersenne.org/ftp_root/gimps/p95v2810.linux64.tar.gz; \
] tar xvzf p95v2810.linux64.tar.gz; \
] ./mprime -m

running with “stress test only”, “mode 1 – small FFT” and 56 cores gets me quite a bit of power consumption.

Idle Blades is being reported as 140W, busy blades are 400W.

Images below the fold.

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Scaleway adds Servers for Intensive Workloads

This blog is hosted at Scaleway

Scaleway lets me know that they added new server types for large workloads.

The the sizes are ten and twelve core machines with 60/120 GB memory respectively and large SSD. Bandwidth is a Gigabit/s and is unmetered. Additional storage volumes can be attached.

So if you are asking where to put your really large MySQL, now you know.

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Google vs. your data

Hooray, EU data protection authorities confirm compliance of Google Cloud commitments for international data flows! exclaims Google.

But on the other hand, Google ordered to hand over foreign emails to FBI, unlike Microsoft.

With legal instabilities and conflicting signals like these, are you running your crap in a public cloud owned and operated by a US company?

You probably should, it’s still better infra than you could create yourself. But the legal nonframework around it – it is not helping at all.

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Shit geeks say

So the Geeks at Datacenter Dynamics quote this geek:

“With a market of more than 80 million people within a roundtrip delay of 30 milliseconds, covering all major cities of Northern Europe, the Baltic states and western Russia, Stockholm is an ideal location for cloud players and other major data center actors,” …

So how many million people are within 30ms of you? 🙂

In other news, the more countries go renewable, the less they are charging for power (they may be charging for infrastructure, though). For data centers in Norway and Sweden, it appears that we are below 4 Cent/kWh now. Oh, and can we please use the exhaust heat from your computers to heat our capital, please?

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