What's excessive disk IO?

I’m kinda new to DO. I have a project that will involve writing a very large number of small files. The smallest droplet outperforms my own hardware, so I’d like to use that with an attached volume. I’m single-threaded right now, and a small test run suggests that I’m generating a sustained 55-60MB/s write. I can tolerate a slower write. My hardware seems to complete the workload at about half the speed of a droplet.

I’m not seeing any separate IOPS charges in the billing data. I don’t see an official limit. Every question I can find on this topic is old.

Before I go any further, is it generally safe for me to have an application that writes like this for a longer period?

Thanks in advance.

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Although broad, excessive I/O would be defined as anything that causes performance to degrade on the host node (i.e. the main server), thus affecting other users’ Droplets.

@ryanpg may be able to shed a little more light on this, or as another option, perhaps fire off a ticket to the support team and ask them directly.