[HN Gopher] Cash App migrated 400TB of data to PlanetScale's cloud
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Cash App migrated 400TB of data to PlanetScale's cloud
Author : mschoening
Score : 32 points
Date : 2024-11-12 20:45 UTC (2 hours ago)
(HTM) web link (planetscale.com)
(TXT) w3m dump (planetscale.com)
| samlambert wrote:
| We've loved working with the incredible team at Cash App. If
| anyone has questions myself or someone on the PlanetScale team
| will answer.
| JTyQZSnP3cQGa8B wrote:
| It would be interesting to know why a Bitcoin application
| requires 400 TB of disk space.
| ImPostingOnHN wrote:
| The article says,
|
| _> At peak times, Cash App 's database handles approximately
| 3-4 million queries per second (QPS) across 400 shards,
| totaling around 400TiB of data._
|
| 400TiB represents not a lot of this data. If each query
| stored only 1 byte, this would only be 4 years worth of this
| data.
|
| If duplicated, or processed and the results stored, that
| would add up, too.
| echoangle wrote:
| Why would a query store data? Are they logging individual
| queries?
| osser wrote:
| It's peer-to-peer payments and banking, which have been
| around for much longer than the stocks/bitcoin aspect of the
| app.
| znpy wrote:
| It's not much data.
|
| With current 22TB magnetic disks it's less than 20 disks,
| they would fit into a single machine (4u, likely).
|
| The Storinator XL60 from 45drives
| (https://www.45drives.com/products/storinator-
| xl60-configurat...) can hold 60 disks, for (advertised)
| ~1.4PB of data.
|
| (btw i've learned about 45drives through Linus Tech Tips
| channel so I think it's obligatory to say LTTSTORE.COM - for
| the meme)
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(page generated 2024-11-12 23:01 UTC)