Amazon EFS 推出 File Sync 服務

先前 Amazon EFS 需要找台機器掛上去再同步 (無論是 EC2 的機器還是透過 VPN 將自己的機器接上去),現在推出可以直接把檔案同步進去的服務了:「Sync Files to Amazon Elastic File System Quickly, Easily and Securely with EFS File Sync」。

不過不是所有提供 Amazon EFS 的區域都有,目前只有 us-east-1us-east-2us-west-2 以及 eu-west-1

EFS File Sync is available in the US East (N. Virginia), US East (Ohio), US West (Oregon), and EU (Ireland) regions, with availability in the EU (Frankfurt) and Asia Pacific (Sydney) regions coming in December 2017.

另外這是有費用的,目前有提供的四區都是 USD$0.01/GB。

Amazon EFS 在德國區開放使用

Amazon EFS 可以看作 NFS 的 SaaS 服務,前陣子宣佈加開德國區:「Amazon Elastic File System (Amazon EFS) Available in EU (Frankfurt) Region」。

加上原來的這些區:

Amazon EFS is also available in US East (N. Virginia), US East (Ohio), US West (Oregon), EU (Ireland), and Asia Pacific (Sydney).

唔,東京區什麼時候上啊...

AWS Storage Gateway 的新功能:File Gateway

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 simply reads and writes files and directories over NFS; behind the scenes, the gateway turns these operations into object-level requests on your S3 buckets, where they are accessible natively (one S3 object per file).

以前自己用 FUSE 惡搞的方式,現在變成官方支援的功能?XDDD

Amazon EFS 脫離測試期

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), and Europe (Ireland) Regions.

不知道穩定性如何 XDDD (因為 Amazon EBS 之前的穩定性太有名...)

之前在測試的時候發現只支援 NFSv4,不支援 NFSv3,這樣有點可惜... 另外價錢也頗高的 :o

USD$75 解 RSA 512bits

Cryptology ePrint Archive 上面剛好是 2015 年編號 1000 號的論文:「Factoring as a Service」。透過 Amazon EC2 服務以及 CADO-NFS 的幫助,四小時內就可以解出 512bits RSA,而如同作者說的,雖然已經很不安全了,但在許多地方仍然被使用著:

The difficulty of integer factorization is fundamental to modern cryptographic security using RSA encryption and signatures. Although a 512-bit RSA modulus was first factored in 1999, 512-bit RSA remains surprisingly common in practice across many cryptographic protocols. Popular understanding of the difficulty of 512-bit factorization does not seem to have kept pace with developments in computing power. In this paper, we optimize the CADO-NFS and Msieve implementations of the number field sieve for use on the Amazon Elastic Compute Cloud platform, allowing a non-expert to factor 512-bit RSA public keys in under four hours for $75. We go on to survey the RSA key sizes used in popular protocols, finding hundreds or thousands of deployed 512-bit RSA keys in DNSSEC, HTTPS, IMAP, POP3, SMTP, DKIM, SSH, and PGP.

另外也有專案網站:「Factoring as a Service」,程式碼也有放上 GitHub:「Factoring as a Service」。

Git 2.5 的 worktree

GitHubGit 2.5 寫的介紹:「Git 2.5, including multiple worktrees and triangular workflows」。

Please note that the worktree feature is experimental. It may have some bugs, and its interface may change based on user feedback. It's not recommended to use git worktree with a repository that contains submodules.

另外效能上也有改善:

Git 2.5 includes performance improvements aimed at large working trees and working trees stored on networked filesystems (e.g., NFS):

Amazon Elastic File System:NFSv4 as a service

在「Amazon Elastic File System – Shared File Storage for Amazon EC2」提到了 Amazon Elastic File System 這個新玩具:

Amazon EFS supports the Network File System version 4 (NFSv4) protocol, so the applications and tools that you use today work seamlessly with Amazon EFS.

居然冒出這功能,又多了個可以惡搞的工具...

目前的價錢是 USD$0.30/month/GB,需要 Preview 申請。這價錢不算便宜,但比起 Amazon S3 的反應時間應該快不少?