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Monthly Archives: April 2010
GCC 4.5.0 以及 ClangBSD
GCC 4.5.0 前幾天公告釋出:「GCC 4.5.0 Released」,而另外一邊以 clang 取代 FreeBSD 系統內 GCC 的計畫 ClangBSD 也開始徵求測試者了:「[CFT]: ClangBSD is selfhosting, we need testers now」。 目前 ClangBSD 可以在 i386 以及 amd64 上編譯 bootable-kernel 以及 world (目前的 -CURRENT 版本),平常在用 -CURRENT 的人除了上面那篇 mailing list 上的說明外,在「Building FreeBSD with … Continue reading
Amazon 的 ELB 支援 Sticky Sessions
Amazon Web Services 大約十天前對 ELB 加上了新功能:「New Elastic Load Balancing Feature: Sticky Sessions」,這個功能想要做到同一個 session 所發出的 request 都導到同一台 server 上。以「Elastic Load Balancing with Sticky Sessions」這篇的說明來看,看起來是 Cookie-based。這在商業 load balancer 上是很常看到的功能,後端的 web server 幾乎不用修改就可以維持同一個 session 都導到同一台 server 上。 另外常見的作法是把 session 資料放到 NFS 或是 memcached … Continue reading
Amazon Simple Notification Service
Amazon Web Services 今天推出 Amazon Simple Notification Service (Amazon SNS),看起來比較像是 Simple Queue Service (Amazon SQS) 的變形:「Announcing Amazon Simple Notification Service」。 Amazon SQS 的架構是 poll-based,而 Amazon SNS 是 event-based,而且允許多個訂閱,可以用 HTTP/HTTPS,以及 Email/Email-JSON (這兩個東西…),另外也可以丟到 SQS。 價錢的部份,除了需要流量費用以外 (要注意的是只要 in/out SNS 就要收錢,而非跨出 Region 才收),另外也有 notification … Continue reading
Amazon Web Services 頻寬合併計算
從 2010 的四月開始 (三月底就先公佈了),在同一個 billing account 下不同服務的頻寬將合併 (並不是所有的服務,請參考官方公告所列的),然後依照各區 (region) 計算:「Announcing Combined AWS Data Transfer Pricing」,除此以外每個月 Outbound 的第一個 GB 是免費的。 這對於使用量夠大的人才有差異:假設 S3 與 EC2 的 US-East 區 Outbound 都是 10TB,舊的算法會算成兩次 10TB (前 10TB 是 USD$0.15/GB,也就是 USD$3000),而新的算法則是算成一次 20TB (第一個 GB 免費,前 10TB … Continue reading
