What is “data availability,” and why is it important for scaling? Don’t panic—the class rep is here to explain:
Ethereum’s December 2025 Fusaka upgrade introduced PeerDAS, so nodes no longer need to download the full blob data. They can verify that the data is available by sampling just a portion of it.
“Data availability” and “permanent data storage” aren’t the same thing: data availability only requires that anyone can download the data during the period when it needs to be verified.
Don’t laugh—I learned this the hard way too.
$TIA 0.6422（-4.09%）
#TIA
Ethereum’s December 2025 Fusaka upgrade introduced PeerDAS, so nodes no longer need to download the full blob data. They can verify that the data is available by sampling just a portion of it.
“Data availability” and “permanent data storage” aren’t the same thing: data availability only requires that anyone can download the data during the period when it needs to be verified.
Don’t laugh—I learned this the hard way too.
$TIA 0.6422（-4.09%）
#TIA