Re:VPS Comparison between Slicehost and Prgmr: is an $8 inst...
by lsc on Monday May 04, 2009 @11:23PM
(#593549)
EC2 kicked my ass when they started their public beta. that's right, something like $70 a month for 1.7GiB was cheaper than I was. I upgraded to new hardware and lowered prices.
Under Xen if there is available CPU, any user can burst to it. I use the credit scheduler, which means you spend scheduler credits to get that CPU. You gain scheduler credits by not using as much CPU. Your weight determines how fast your credits accumulate, so a domain with twice as much weight, assuming contention, gets twice as much cpu as another domain. I weight my domains based on the amount of ram they have, so a 64Mb domain has 1/4th the weight of a 256MiB domain.
The ceiling on how much CPU you can use when nobody else wants it is set by the number of vcpus you have. I give you one, and in this example, slicehost gives you 4. this is in an effort to make the jokers who run mprime all day (I'm looking at you) from dragging down the service for everyone else. And they don't. I see some users who regularly use as much cpu as they are allowed, and it doesn't cause problems for my more restraned users.
my standard system has 32GiB ram and 2 quad-core 1.9Ghz opterons. (I have one with 64GiB and 2 2.1Ghz shanghais, but most of that ram is being used as cache for my experimental ZFS domain, so it shouldn't have more contention than the 32GiB servers)
As for the number of domains, depends on how many users sign up for what plan. 62 domains are on the system that the user who ran this test is on.
Under Xen if there is available CPU, any user can burst to it. I use the credit scheduler, which means you spend scheduler credits to get that CPU. You gain scheduler credits by not using as much CPU. Your weight determines how fast your credits accumulate, so a domain with twice as much weight, assuming contention, gets twice as much cpu as another domain. I weight my domains based on the amount of ram they have, so a 64Mb domain has 1/4th the weight of a 256MiB domain.
The ceiling on how much CPU you can use when nobody else wants it is set by the number of vcpus you have. I give you one, and in this example, slicehost gives you 4. this is in an effort to make the jokers who run mprime all day (I'm looking at you) from dragging down the service for everyone else. And they don't. I see some users who regularly use as much cpu as they are allowed, and it doesn't cause problems for my more restraned users.
my standard system has 32GiB ram and 2 quad-core 1.9Ghz opterons. (I have one with 64GiB and 2 2.1Ghz shanghais, but most of that ram is being used as cache for my experimental ZFS domain, so it shouldn't have more contention than the 32GiB servers)
As for the number of domains, depends on how many users sign up for what plan. 62 domains are on the system that the user who ran this test is on.