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by vitalyd 3928 days ago
http://www.scylladb.com/technology/memory/

By the way, I think you're replying to one of the devs of Scylla.
2 comments
cbsmith 3928 days ago
So, in general, I understand there is lots of stuff going on in Scylla that does distinguish it, at least from Cassandra. There is the user space networking logic for IO. However, a lot of the IO overhead with disk, for example.
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vitalyd 3928 days ago
>However, a lot of the IO overhead with disk, for example.

That's why they benchmarked this workload on a 4x SSD RAID configuration :). Given that i/o bandwidth and throughput continues to increase, processor frequency isn't, and core counts are going up, it's prudent to design a system that can take advantage of this.

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cbsmith 3928 days ago
Yeah, and a 4x SSD RAID configuration is kind of overkill in the extreme for most Cassandra set ups.

I'm sure there is a way to set up IO subsystems so that Cassandra becomes a huge bottleneck, but that's a pretty specialized context.

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cbsmith 3928 days ago
I'm sure I am.
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