Block storage and object storage performance limits on 3Engines Cloud[🔗](#block-storage-and-object-storage-performance-limits-on-brand-name "Permalink to this headline")
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On 3Engines Cloud, there are performance limits for **HDD**, **NVMe (SSD)**, and **Object Storage** to ensure stable operation and protect against accidental DDoS attacks.

Current limits[🔗](#current-limits "Permalink to this headline")
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Block HDD
:   **500** IOPS (read and write)

Block SSD/NVMe
:   **3000** IOPS (read and write)

    **NOTE**: On 3Engines Cloud, *all* SSD storage is NVMe-based.

S3 Object Storage (General Tier)
:   **2000** operations per second with a

    * **2500 burst limit** per bucket and
    * **150 MB/s** transfer per request

In majority of cases, the actual throughput may be larger because:

> * Typical downloads use **multiple requests** and
> * More than **99.95%** of requests stay below **100 MB/s**.

Again, this limit primarily helps mitigate accidental **DDoS** scenarios.