I think the point of this post is the trend. At one time master-slave also performed quite well, then we'd see trends where latency increased until a blowup. These graphs show a similar pattern to that: increasing latencies over time. We would like to know that: 1) the trend won't continue, 2) we won't start seeing massive blowups.
As for the SLA, see the exclusions section. SLAs are fairly worthless in my honest opinion anyway, so this probably isn't really something to worry about though. http://code.google.com/appengine/sla.html Robert On Fri, Sep 2, 2011 at 10:47, Vivek Puri <[email protected]> wrote: > I will disagree with this post. We were on MS earlier and now on HRD. > While on MS, we used to have datastore timeouts all the time and it > was driving me insane looking at 20-30k error emails come in. After > the move to HRD, everything is stable and there are no datastore > timeouts anymore. I am happy with the move. > > > > On Sep 2, 11:15 am, Pol <[email protected]> wrote: >> This is really scary. I'm not so obsessed about the price increase as >> this is something you can "control", but if the HRD starts becoming >> slower and slower, there's absolutely nothing you can do. According to >> these official graphs, it's literally 2X slower than 1 year ago. I'm >> OK with training some speed against increase reliability, the promise >> of HRD, but at some point, you need to draw a line: what tells us it's >> not going to take 500ms to do basic queries a year from now? >> >> App Engine team: what's your explanation for this? Are you going to >> put clauses in the SLA to guarantee max average get / put / query >> latencies? Seems to me that if you want to go "enterprise-focus" >> that's needed. >> >> On Sep 2, 6:23 am, Mike Wesner <[email protected]> wrote: >> >> >> >> >> >> >> >> > Yes, I agree that it won't (can't) get as bad as m/s did get because >> > HRD is awesome. My concern is mostly over how they provision and that >> > the latency is that much higher than it was. Why does the load have >> > such a big impact on latency of datastore query? >> >> > We keep very detailed statistics about the latency of our services and >> > its clear by our average latencies that it has creeped up over time. >> > It is roughly 200ms higher than it was when we first moved over to >> > HRD. >> >> > Mike >> >> > On Sep 2, 8:16 am, Tim Hoffman <[email protected]> wrote: >> >> > > Hi >> >> > > Actually I would disagree on the M/S front, all of my apps are on M/S and >> > > even despite the recent issues >> > > M/S is way more stable than it was in 2008 and 2009, I mean WAY MORE >> > > STABLE >> > > ;-) >> >> > > Thats not to say more growing pains won't be felt. My guess is with a >> > > supposed imminent exodus of apps, we may say some >> > > performance improvements across the board ;-) >> >> > > Rgds >> >> > > Tim > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
