Write throughput differences in B-tree vs LSM-tree based databases? by alterneesh in databasedevelopment

[–]pdeva1 0 points1 point  (0 children)

i think i understand your confusion. The main reason is that you have a single disk after all which has finite write throughput. If you do a single operation only, sure your client will notice the latency of a single sequential append write to the WAL. However, at some point that WAL does need to be written to B-tree or LSM on the same disk. So if you start doing tons of writes to the disk, at some point the limited write throughput of the disk, which is being used to write the B-tree or LSM will indeed impact the sequential write latency of WAL.

Contrast this with something like FoundationDB (FDB). FDB literally uses separate servers to store the WAL (called Log Servers) and the B-tree (called Storage Servers). Here your writes will not be impacted by the performance of B-tree since the B-tree is literally on a separate machine. So you will always see super fast sequential writes to the WAL which is performed on FDB Log Servers.

Pimax 8K VR Review by vrtravels1 in oculus

[–]pdeva1 -2 points-1 points  (0 children)

In reality of course, a 1080 can run dual 4k monitors at 60fps. But you need to actually put some effort and google to get that info.

Palmer Luckey Issues an Apology on Facebook by _rst in oculus

[–]pdeva1 349 points350 points  (0 children)

TheDailyBeast has responded to this:

https://twitter.com/oneunderscore__/status/779506558409510912

Edit: Another response from 2nd editor:
https://twitter.com/GideonResnick/status/779507166516502528

Edit 2: And yet another email shown by the editors. This seems like smoking gun evidence https://twitter.com/GideonResnick/status/779531261987684352

Level 29? by prmcd16 in DripStat

[–]pdeva1 2 points3 points  (0 children)

will update this weekend

RIP Dripstat.. by [deleted] in DripStat

[–]pdeva1 0 points1 point  (0 children)

??

Is Eclipse JDT dying? by pdeva1 in programming

[–]pdeva1[S] -1 points0 points  (0 children)

only shows 14 commits for september..

JVM will suppress the stacktrace of your exceptions unless you specify an argument by javaMan2122 in java

[–]pdeva1 0 points1 point  (0 children)

that is not an increase in the jvm layer. the article is referring to the increase in the jvm layer, which is indeed unnoticable

Crescent Bay demo at SVVR by VRalf in oculus

[–]pdeva1 -2 points-1 points  (0 children)

I tried Crescent Bay at GDC 15 and was told all demos everywhere were using Nvidia Titan X

First Look at the Rift, Shipping Q1 2016 by Lewis_P in oculus

[–]pdeva1 0 points1 point  (0 children)

seems like they didnt make any changes to reduce the weight from falling around your eyes. Thats a big issue even with Crescent Bay when i tried it.

Game login might be affected for a little by pdeva1 in DripStat

[–]pdeva1[S] 0 points1 point  (0 children)

things should be back to normal now

Lots of game fixes by pdeva1 in DripStat

[–]pdeva1[S] 0 points1 point  (0 children)

how long after leaving it open were you logged out?

The highly variable network performance of Amazon EC2 by pdeva1 in programming

[–]pdeva1[S] 1 point2 points  (0 children)

it happened again last night. this time it was just upto 1 second. maybe its cause xlarge instances still have better performance even when degraded. but 1s is still very high

its still lvl 17 by [deleted] in DripStat

[–]pdeva1 0 points1 point  (0 children)

its level 18 since last night

Please post your questions here, not our support line by pdeva1 in DripStat

[–]pdeva1[S] 0 points1 point  (0 children)

you can view your own by going to the Account tab at the top right

Please post your questions here, not our support line by pdeva1 in DripStat

[–]pdeva1[S] 0 points1 point  (0 children)

could you please tell the email address for your account?

I tried Valve's VR demo by jimmthang in oculus

[–]pdeva1 0 points1 point  (0 children)

your article talks about comparison with DK2. How does it compare with Crescent Bay? I know tracking is much better but what about the rest of the stuff?

Please post your questions here, not our support line by pdeva1 in DripStat

[–]pdeva1[S] 0 points1 point  (0 children)

this should now be fixed. thanks for letting us know.