Hello All,
What is the maximum number of k-safety value we can configure.
Lets say I have a 10 node cluster, what will be the best k-safety and what will be the max k-safety
Thanks
max k-safety
Moderator: NorbertKrupa
Re: max k-safety
Hi!
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Last edited by id10t on Wed May 06, 2015 5:35 pm, edited 1 time in total.
- JimKnicely
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Re: max k-safety
What do you guys think about leaving k safety at 1 when the number of nodes > 4?
Jim Knicely
Note: I work for Vertica. My views, opinions, and thoughts expressed here do not represent those of my employer.
Note: I work for Vertica. My views, opinions, and thoughts expressed here do not represent those of my employer.
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- GURU
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Re: max k-safety
After we had 2 nodes down in our 8 node environment, I've always wanted to go to K-safety of 2.
Checkout vertica.tips for more Vertica resources.
Re: max k-safety
I know they exist, but we typically don't recommend K=2 because the ROI just really isn't there. If you really demand 100% uptime, a DR solution is your best alternative, vs. adding that much more data into your existing cluster.
Re: max k-safety
We briefly went to k-safety 2 and pretty hastily beat a retreat back to 1. I/O performance took a bit of a hit at 2 and thinking it through, even at 1, you can have more than 1 node go down (depending on which node it it). When I taked to Vertica support, they recommended avoiding 2 as well.