Disc IO 512mb vs The World

I've always had a bit of a suspicion - that there will be the least contention for resources (ie IO) on the smallest plan, because the majority of people on this plan will have next to no traffic, since this is the 'catch all' for anyone for whom IO and CPU etc are no problem (dev boxes, small hobby boxes etc). Whereas anybody on any other plan, including the second smallest plan, is likely to be making good use of their resources.

You also have to consider that your 512 might be on a relatively empty host. Try knocking up another 512 in a different DC and see if you get consistent results.

@AceStar:

I've always had a bit of a suspicion - that there will be the least contention for resources (ie IO) on the smallest plan, because the majority of people on this plan will have next to no traffic, since this is the 'catch all' for anyone for whom IO and CPU etc are no problem (dev boxes, small hobby boxes etc). Whereas anybody on any other plan, including the second smallest plan, is likely to be making good use of their resources.

I have to agree with this. Last night I migrated from a 512 to a 768 plan and noticed that the CPU usage on the 768 plan was higher than the 512 one.

Makes sense really when you explain it that way AceStar.

The hardware is identical, and you have access to the same theoretical maximum CPU/bandwidth/disk IO. The only difference between plans is how many nodes they stick on a machine. There's a fixed amount of RAM on the hosts, and linode plans are not mixed and matched (one type of linode per host). This means that buying a bigger linode gets you a bigger share (and there are less other linodes) of the host.

On a box with low contention, this probably means no difference except in RAM. On a box with high contention, this means you'll get a bigger guaranteed share of CPU time and higher IO priority.

Personally, I've always felt that it's probably more productive to scale horizontally than vertically at Linode, as long as your bottleneck isn't RAM or bandwidth. Jed disagrees with me, though ;)

Surely the discrepancy is too great for the hardware to be identical?

I spooled up another 512, and got the similar results.

@fiat:

SSD in 512?
This one always makes me laugh ~_~

why tinono?

please share.

@fiat:

why tinono?

please share.

Small answer ?

Because they are not using SSDrives :D