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A comment on Post mortem on mastodon outage with 30k users (hachyderm). Parent comment

Re:Post mortem on mastodon outage with 30k users (hachyderm) by throw0101c on Sunday December 04, 2022 @02:54PM (#33857129)
> The problem with NFS is that all of those queues are sharing the filesystem, making the filesystem a point of failure and scaling pain.

It is not NFS that is a SPOF, it is a single NFS server that is a SPOF. There exists distributed NFS systems (OneFS, Panasas) that can tolerate the loss of up to N servers before the service gets disrupted.

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Re:Post mortem on mastodon outage with 30k users (hachyderm) by evankanderson on Monday December 05, 2022 @10:50AM (#33867183)
I suspect distributed NFS won't help here when the problem is that a server gets slow / overloaded. In particular, this setup was actually I/O bound and there wasn't more I/O to be had.
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Re:Post mortem on mastodon outage with 30k users (hachyderm) by throw0101c on Monday December 05, 2022 @01:05PM (#33869228)
> In particular, this setup was actually I/O bound and there wasn't more I/O to be had.

No more I/O to be had from that particular NFS server. If your mounts are distributed over 4+ servers, then you have potentially 4x the available operations available.

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