# Maximum usable size of the repository? Petabyte scale possible?

**URL:** <https://kopia.discourse.group/t/maximum-usable-size-of-the-repository-petabyte-scale-possible/1674>\
**Category:** General Topics\
**Created:** [January 5, 2023, 7:07pm UTC](https://kopia.discourse.group/t/maximum-usable-size-of-the-repository-petabyte-scale-possible/1674 "2023-01-05T19:07:12Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![llss](https://avatars.discourse-cdn.com/v4/letter/l/f08c70/32.png) [@llss](https://kopia.discourse.group/u/llss)\
**Post date:** [February 8, 2023, 11:30am UTC](https://kopia.discourse.group/t/maximum-usable-size-of-the-repository-petabyte-scale-possible/1674/7 "2023-02-08T11:30:24Z")

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I pulled the trigger on it, got ~257TB in the repo for now (after compression) and pumping more:

```auto
Count: 126900820
Total Bytes: 283.2 TB
Total Packed: 257.6 TB (compression 9.0%)
By Method:
  (uncompressed) count: 86253380 size: 193.6 TB
  zstd-fastest count: 40647440 size: 89.6 TB packed: 64.1 TB compression: 28.5%
Average: 2.2 MB
Histogram:

        0 between 0 B and 10 B (total 0 B)
   927062 between 10 B and 100 B (total 73.4 MB)
 18537306 between 100 B and 1 KB (total 6.9 GB)
  8198209 between 1 KB and 10 KB (total 29 GB)
  9680197 between 10 KB and 100 KB (total 437.5 GB)
 22635108 between 100 KB and 1 MB (total 9.6 TB)
 66922938 between 1 MB and 10 MB (total 247.6 TB)
        0 between 10 MB and 100 MB (total 0 B)

```

Things seem to be OK for now, everything works (well, besides this weird [corruption](https://kopia.discourse.group/t/kopia-repository-corrupted-itself-unable-to-add-to-xxx-index-blob-cache-context-canceled/1766) thing, unclear what caused it still - luckily it was easily fixable, once you know what is going on).

We will see how it goes, but so far I am very impressed by the design and engineering behind Kopia - it very elegant, feature-rich, efficient (multithreading everywhere, no hard locks and bottlenecks on repos/resources, with ‘eventually consistent’ model) and seem to scale well.

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_[View the full topic](https://kopia.discourse.group/t/maximum-usable-size-of-the-repository-petabyte-scale-possible/1674)._