Tag Archives: space

Quotient filter

之前有提過「Cuckoo Filter:比 Bloom Filter 多了 Delete」,最近在「A general purpose counting filter: making every bit count」這邊看到 Quotient filter,也是類似 Bloom filter 的資料結構,但想要解決更多問題。 一般的 Bloom filter (BF) 會有這些問題: The inability to delete items Poor scaling out of RAM The inability to resize dynamically The … Continue reading

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StackOverflow 發 Tab/Space 戰文

StackOverflow 直接拿薪水戰 Tab 與 Space 的差異啊 XDDD:「Developers Who Use Spaces Make More Money Than Those Who Use Tabs」。 這下糟糕了 XDDD

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Amazon Redshift 壓縮率的改善

Amazon Redshift 對壓縮率的改善:「Data Compression Improvements in Amazon Redshift Bring Compression Ratios Up to 4x」。 首先是引入了 Zstandard: First, we added support for the Zstandard compression algorithm, which offers a good balance between a high compression ratio and speed in build 1.0.1172. … Continue reading

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辦公室採用開放式空間的問題

這幾年對於開放式空間有不少反面意見出來,像是這幾天 BBC 登的「Why open offices are bad for us」。 這是目前的主流,大量的公司採用開放式空間: Numerous companies have embraced the open office — about 70% of US offices are open concept — and by most accounts, very few have moved back into traditional spaces with … Continue reading

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debootstrap 可以把所有檔案都裝到 /usr 下了

從「You can now try merged /usr in Debian」這邊看到,早期因為硬碟空間比較小的關係,會切成 /bin、/usr、/lib 之類的目錄: The original impetus for requiring these directories was due to space limitations in the first Unix implementations, developers favoring the change point out. 這個理由很明顯已經消失了,所以 Debian 就規劃要整併起來...

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分析 GitHub 上的 Tab 與 Space

作者用 BigQuery 分析了 GitHub 上的 Tab 與 Space 的差異 (是個 flame war 開始的節奏 XDDD):「400,000 GitHub repositories, 1 billion files, 14 terabytes of code: Spaces or Tabs?」。 可以看到除了 C 與 Go 以外,大多數的程式語言都是 Space > Tab。另外在文章下面也有使用的 BigQuery 指令可以參考。

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Netflix 對 sendfile() 在 TLS 情況下的加速

Netflix 對於寫了一篇關於隱私保護的技術細節:「Protecting Netflix Viewing Privacy at Scale」。 其中講到 2012 年的 Netflix Open Connect 中的 Open Connect Appliance (OCA,放伺服器到 ISP 機房的計畫) 只有單台伺服器 8Gbps,到現在 2016 可以達到 90Gbps: As we mentioned in a recent company blog post, since the beginning of the Open … Continue reading

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國際太空站要裝咖啡機了...

在「The International Space Station (Finally) Gets an Espresso Machine」這篇看到的,原始的報導出自「The International Space Station (finally!) gets an espresso machine」。 幾個重點 XDDD The ISSpresso requires 120V DC power which is obtained at the Utility Outlet Panel (UOP) on the ISS. 很特別的電力,是 120V DC … Continue reading

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真空環境下,羽毛與保齡球的自由落體

BBC 跑去 NASA 在俄亥俄州的 Space Power Facility 做實驗:「The Hammer-Feather Drop in the world’s biggest vacuum chamber」。 超大的真空環境!XD

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Linode 調大儲存空間...

Linode 決定調大空間:「Storage Space Doubled!」。 所以現在 USD$20/month 就可以在東京有 1GB RAM、48GB storage 以及 2TB 的 outbound bandwidth 了。如同往常 (之前從 20GB 變成 24GB),關機後直接 resize,重開後就生效了 :p

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