Contact us to opt out. If you want to exclude your Customer Data from Slack global models, you can opt out. To opt out, please have your Org or Workspace Owners or Primary Owner contact our Customer Experience team at feedback@slack.com with your Workspace/Org URL and the subject line “Slack Global model opt-out request.” We will process your request and respond once the opt out has been completed.
On September 1, 2022, monthly Pro plans will increase from $8 USD to $8.75 USD per user per month, and annual Pro plans will increase from $6.67 USD to $7.25 USD per user per month (pricing for other countries is available here).
現有用戶有一次用原價 renew 一年的機會:
Current customers on an annual Pro plan can lock in the existing annual rate of $6.67 USD per user per month for another year by early-renewing the annual Pro plan before September 1.
這次的 downtime 主要是發生在 Group Direct Message (GDM) 的部份:
A significant element of the datastore load appeared to be from a query that listed Group Direct Message (GDM) conversations by user. This operation is fronted by our cache tier, so the high query load seemed to indicate something was wrong with our caches.
這個 GDM 的查訊效率不高,而是靠 cache layer 撐住的,加上二月 22 日那天他們在更新 Consul 的 agent,導致 hit rate 的下降,以及遇到一個比較大的 peak time,接著就壓垮了資料庫。
Our underlying hardware (AWS) is nothing like this reliable. We see regular (several times a year) failure of racks of machines or whole DCs.
Across the whole fleet (all services), we lose 1-10 servers per day as a baseline. Major events are then on top of that and can impact thousand of hosts at once.
另外一個是反駁自以為的量級估算:
> Even the largest Slack instance probably has under 100,000 users and less than 1000 peak messages per second.