storage-blob-scale-targets.md

author	ms.service	ms.topic	ms.date	ms.author
tamram	azure-storage	include	01/11/2023	tamram

Resource	Target
Maximum size of single blob container	Same as maximum storage account capacity
Maximum number of blocks in a block blob or append blob	50,000 blocks
Maximum size of a block in a block blob	4000 MiB
Maximum size of a block blob	50,000 X 4000 MiB (approximately 190.7 TiB)
Maximum size of a block in an append blob	4 MiB
Maximum size of an append blob	50,000 x 4 MiB (approximately 195 GiB)
Maximum size of a page blob	8 TiB2
Maximum number of stored access policies per blob container	5
Target request rate for a single blob	Up to 500 requests per second
Target throughput for a single page blob	Up to 60 MiB per second2
Target throughput for a single block blob	Up to storage account ingress/egress limits1

¹ Throughput for a single blob depends on several factors. These factors include but aren't limited to: concurrency, request size, performance tier, speed of source for uploads, and destination for downloads. To take advantage of the performance enhancements of high-throughput block blobs, upload larger blobs or blocks. Specifically, call the Put Blob or Put Block operation with a blob or block size that is greater than 256 KiB.

² Page blobs aren't yet supported in accounts that have a hierarchical namespace enabled.

The following table describes the maximum block and blob sizes permitted by service version.

Service version	Maximum block size (via Put Block)	Maximum blob size (via Put Block List)	Maximum blob size via single write operation (via Put Blob)
Version 2019-12-12 and later	4000 MiB	Approximately 190.7 TiB (4000 MiB X 50,000 blocks)	5000 MiB
Version 2016-05-31 through version 2019-07-07	100 MiB	Approximately 4.75 TiB (100 MiB X 50,000 blocks)	256 MiB
Versions prior to 2016-05-31	4 MiB	Approximately 195 GiB (4 MiB X 50,000 blocks)	64 MiB