Tag Archives: file

Bash 裡處理 PID file 的方式...

Posted on May 26, 2017 by Gea-Suan Lin

看到「Age comparison in Bash for files and processes」後查了一些資料，如果在不使用外部程式處理的話，的確是多做了不少事情。 這是 Bash 對 -ot 的說明： file1 -ot file2 True if file1 is older than file2, or if file2 exists and file1 does not. 而這是 test (也就是 [ 這隻程式) 對 -ot 的說明： FILE1 … Continue reading →

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CodeDeploy 對發生衝突的調整

Posted on May 17, 2017 by Gea-Suan Lin

AWS CodeDeploy 推出了新的功能，當 CodeDeploy 偵測到發生衝突時可以設定處理的方式：「AWS CodeDeploy Adds File Handling Support」。 以往遇到衝突時就會失敗，而現在可以選擇處理方式了： Previously, CodeDeploy would fail the deployment when it detected a discrepancy between the files present at a target location and those in the last successful deployment. Now, you can … Continue reading →

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AWS Storage Gateway 的新功能：File Gateway

Posted on May 1, 2017 by Gea-Suan Lin

AWS Storage Gateway 推出新功能 File Gateway：「File Interface to AWS Storage Gateway」。 可以讓使用者在前面用 NFS，後面實際接的是 Amazon S3： After you set it up in your data center or in the cloud, your configured buckets will be available as NFS mount points. Your application … Continue reading →

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在 ext4 上的 CCFS

Posted on March 18, 2017 by Gea-Suan Lin

在「Application crash consistency and performance with CCFS」這篇看到的東西。 CCFS 目標是拉高 ext4 的 data integrity，並且還是有高效能： CCFS (the Crash-Consistent File System) is an extension to ext4 that restores ordering and weak atomicity guarantees for applications, while at the same time delivering much improved … Continue reading →

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把 HDFS 的 metadata 丟上 NewSQL

Posted on March 5, 2017 by Gea-Suan Lin

把 HDFS 的效能瓶頸 metadata server 的資料改到 NewSQL 上使得效能大幅提昇：「HopsFS: Scaling Hierarchical File System Metadata Using NewSQL Databases」。 In this paper, we introduce HopsFS, a next generation distribution of the Hadoop Distributed File System (HDFS) that replaces HDFS’ single node in-memory metadata … Continue reading →

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Google 再次改善 Android 的 APK 更新，讓下載的量更小

Posted on December 11, 2016 by Gea-Suan Lin

Google 的人再次更新了演算法，將下載的量再次減少，從本來的 47% 降到 65%：「Saving Data: Reducing the size of App Updates by 65%」。 今年七月的時候，更新演算法導入了 bsdiff，使得本來要抓整包 APK 的量，變成抓 diff 的部份，這使得下載的流量降了 47%：「Improvements for smaller app downloads on Google Play」。 Using bsdiff, we were able to reduce the size of app updates … Continue reading →

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Amazon EFS 脫離測試期

Posted on June 29, 2016 by Gea-Suan Lin

Amazon EFS 其實就當作是 NFS/CIFS as a service，之前一直在測試期，現在正式宣佈進入 Production 了：「Amazon Elastic File System – Production-Ready in Three Regions」。 開放三個區域使用： I am happy to announce that EFS is now available for production use in the US East (Northern Virginia), US West (Oregon), … Continue reading →

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GitHub 支援拖拉上傳並且 commit

Posted on February 21, 2016 by Gea-Suan Lin

GitHub 推出了拖拉上傳的功能：「Upload files to your repositories」。 這功能讓 programmer 以外的人更容易參與了...

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用 hosts 搞出來的 Adblock...

Posted on February 13, 2016 by Gea-Suan Lin

在「Amalgamated hosts file」這邊看到超大包的 hosts，拿來擋廣告： This repo consolidates several reputable hosts files and merges them into a single amalgamated hosts file with duplicates removed. Currently this amalgamated hosts file contains 27,148 unique entries. 一包 hosts 有兩萬七千筆資料會不會太多了點... 話說不知道能不能 import 進 BIND 或是 … Continue reading →

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取得某些 tld 所有的 Domain Name

Posted on October 19, 2015 by Gea-Suan Lin

在「How to Download a List of All Registered Domain Names」這邊介紹了 .com、.net 以及 .name 的 zone file 怎麼申請與下載 (由 Verisign 維護的三個 tld)。 另外也介紹了 Centralized Zone Data Service，包括所有的 tld，以及 ICANN 提供的 API。 這樣應該有很多資料可以分析？

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