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Tag Archives: ebs
EBS 有動態長大的功能了...
Amazon EBS 可以動態增加大小了，是個對不少人還蠻方便的功能：「Amazon Elastic Block Store (Amazon EBS) Enables Live Volume Modifications with Elastic Volumes」。 這邊講的沒有 downtime 當然還是得需要 filesystem 支援： Today we are introducing the Elastic Volumes feature for Amazon Elastic Block Store (Amazon EBS). This new capability allows you … Continue reading
Netflix 把金流相關的系統轉移到 AWS 上跑 MySQL 的故事...
這次要提的是「Netflix Billing Migration to AWS」、「Netflix Billing Migration to AWS - Part II」與「Netflix Billing Migration to AWS - Part III」這三篇。 Netflix 先前的金流相關系統跑的是 Oracle 的資料庫： 然後換成 MySQL： 系統上是採用 DRBD，然後底層是 5 個 4TB 的 EBS 組成的 RAID 0，跑 LVM： High performance with respect … Continue reading
Amazon EBS 推出新磁碟種類
Amazon EBS 推出了新的磁碟種類，都是比現在更經濟 (白話文：更便宜) 的方案：「Amazon EBS Update – New Cold Storage and Throughput Options」。 第一種是 Amazon EBS Throughput Optimized HDD，代號是 st1；第二種是 Amazon EBS Cold HDD，代號是 sc1，兩種都是傳統磁頭硬碟。 第一種 st1 重視 sequential 的 throughput： Starts at 250 MB/s for a 1 terabyte … Continue reading
EC2 instance Auto Recovery 功能全區開放
在 Twitter 上看到公告：「Announcement: EC2 instance Auto Recovery now available in 8 more AWS Regions」。 也就是 C3、C4、M3、R3、T2 這五種 instance 都可以開 Auto Recovery，而且必須在 VPC 內的 EBS-only instance。 在某種程度上的 High Availability 機制可以直接用這個功能解決掉。
用 EBS-SSD 開機的 Ubuntu
前幾天 AWS 推出 EBS-SSD (參考「AWS 推出 SSD EBS」)，然後今天看到「EBS-SSD Boot AMIs For Ubuntu On Amazon EC2」。 Canonical 正式的說明在「[ubuntu-cloud] Amazon SSD backed EBS volumes」這邊可以看到，而「Amazon EC2 AMI Locator」上也新增了 EBS-SSD 的部份。
AWS 推出 SSD EBS
EBS 是 AWS 上的 block-level storage，除了空間本身要收費以外，I/O 本身也要收費。到今天為止，EBS 只提供 Magnetic volume，也就是與傳統硬碟性質接近的 EBS。 而今天 AWS 推出了 SSD 的 EBS：「New SSD-Backed Elastic Block Storage」，價錢上當然就比傳統硬碟建立的 EBS 貴，但看起來是個可以接受的數字？ 另外傳統硬碟的 Provisioned IOPS volume 也降價了，約 35% off： We are also announcing that we are reducing the price … Continue reading
AWS EC2 更新以及降價，以及 EBS 降價...
AWS 官方公告這一波改善：「AWS Update - New M3 Sizes & Features + Reduced EBS Prices + Reduced S3 Prices」。 首先是 EC2 多了 m3.medium 與 m3.large，與 m1.medium 與 m1.large 相比很有競爭力？ 以 {m1,m3}.medium 比較來看，m3 的 ECU 值比 m1 高 50% (3 vs 2)，而且有 SSD … Continue reading
AWS EBS 的改善...
AWS EBS 是 Amazon Web Services 平台上的永久性儲存空間 (一般開起來的空間在 crash 後會消失)，不過 EBS 的效能 (速度與 IOPS) 一直讓大家很頭痛，要硬撐 IOPS 的方式是透過四個 EBS volume，上面用 mdadm 跑 RAID0... 這幾個禮拜 AWS 丟出了兩個方案出來，提供不同的選擇... 首先是帶大容量 SSD 空間的 instance，參考「AWS 推出高速 I/O 的 EC2 instance」，這對於 cache 類的應用相當適合... 而昨天則是介紹了 Provisioned IOPS 與 … Continue reading
Amazon 詳細說明 AWS EBS/RDS 故障的原因...
Amazon 在網頁上說明了在 4/21 美東地區 EBS/RDS 故障的原因：「Summary of the Amazon EC2 and Amazon RDS Service Disruption in the US East Region」。 整篇文章相當長，但整個連鎖反應是起於操作時的人為疏失。而 RDS 因為是基於 EBS 上，所以也跟著大爆炸... 另外文章最後面也提到賠償的方式： For customers with an attached EBS volume or a running RDS database instance in … Continue reading
AWS EC2/EBS 用了三天半時間恢復...
AWS EC2/EBS 從星期四 21 日下午四點開始 (+8 時區)，到剛剛在「Service Health Dashboard」上看到宣佈恢復 (亮綠燈)，總共花了超過三天半的時間。有些人受到影響時間比較長，有些人比較短，我是在 24 號的凌晨恢復的，受到影響時間約兩天多。這幾天應該會有比較正式的說明... 手上本來沒打算這麼早設計 failover 機制的，現在都要拉到前面做了...