Kagi 常態公開他們的訂閱數量

在「Kagi Search Stats (kagi.com)」這邊看到 Kagi 公開了訂閱數量:「Kagi Search Stats」。在「Changelog」裡面可以看到發表的資訊,可以看到也沒有給太多解釋。

現在是 7945 users + 232 family plan 的收入 (但不確定到底是合併算還是分開算),另外大約是 150K/day (週間) 與 110K/day (週末) 的 query 量。

成長速度看起來不太快,目前看起來是一個禮拜大概多 100 users,如果等比例的話,一年大概多 5k users?

交叉看一下去年九月的時候寫的資料,差不多就剛好是一年前的文章:「Kagi status update: First three months」。

一年前支出的部分大約是 $26K/mo 左右;粗粗算一下現在的 query 量,假設還是一樣的成本結構,現在大約是 $50K/mo,但今年多了很多 AI 的 API cost,所以應該還會再加上去...

We are currently serving around 2.1M queries a month, costing us around $26,250 USD/month.

一年前提到有 2.6k users,當時只有單一方案 US$10/mo;現在是 7.9k users,不過方案比較多,而且後來進來的人費用有調漲,如果還是拿以前的單價來算的話大約是 US$79k。

Kagi search is currently serving ~2,600 paid customers.

當年提到 $26k/mo 的收入差不多就只能 cover 基礎建設,人事費用就還得從各種 funding 支付;現在應該是能夠額外 cover 一些些人事的部分?

Between Kagi and Orion, we are currently generating around $26,500 USD in monthly recurring revenue, which incidentally about exactly covers our current API and infrastructure costs.

Backblaze 的 2019 年度硬碟報告

Backblaze 丟出去年的報告了:「Backblaze Hard Drive Stats for 2019」。

WD/HGST 的還是最耐用,再來是 Toshiba 的,最後是 Seagate 的。

不過有一些硬碟沒有列到表上,像是「Seagate 16 TB Drives」這組因為 2019Q4 才剛裝上去,所以才 1440 drive days,因此還沒到門檻所以沒放進報告,但就 Backblaze 測試起來看起來是個好的開始:

In Q4 2019 we started qualifying Seagate 16 TB drives, model: ST16000NM001G. As of the end of Q4 we had 40 (forty) drives in operation, with a total of 1,440 drive days—well below our 5,000 drive day threshold for Q4, so they didn’t make the 2019 chart. There have been 0 (zero) failures through Q4, making the AFR 0%, a good start for any drive. Assuming they continue to pass our drive qualification process, they will be used in the 12 TB migration project and to add capacity as needed in 2020.

再來是把 2017/2018/2019 擺在一起看:

馬上可以看到的是 AFR 上升了不少,一個是因為 8TB 系列的硬碟進入中年期,另外是 Seagate 12TB 硬碟的問題:

The total AFR for 2019 rose significantly in 2019. About 75% of the different drive models experienced a rise in AFR from 2018 to 2019. There are two primary drivers behind this rise. First, the 8 TB drives as a group seem to be having a mid-life crisis as they get older, with each model exhibiting their highest failure rates recorded. While none of the rates is cause for worry, they contribute roughly one fourth (1/4) of the drive days to the total, so any rise in their failure rate will affect the total. The second factor is the Seagate 12 TB drives, this issue is being aggressively addressed by the 12 TB migration project reported on previously.

所以大原則還是跟以前差不多,沒有時間特別研究的話就先往 WD/HGST 這邊找...

Backblaze 的 2017 年硬碟年度報告

Backblaze 照慣例發表了 2017Q4 與 2017 全年的硬碟報告出來了:「Backblaze Hard Drive Stats for 2017」。

最重要就這三張圖表,第一張是 2017Q4 資料,第二張是從 2013/04 到 2017/12 的資料,第三張是這三年的資料 (2015/2016/2017):

我先說一下結論,因為這幾年幾乎都只採購 SeagateHGST 的硬碟,所以要用他們的資料判斷 WDToshiba 的硬碟已經沒有價值了。

唯一有價值的資料是 HGST 的硬碟比 Seagate 好不少,要做出其他結論的樣本數都不夠。