Comments for NevDull's Take On Things http://www.nevdull.com Sharing my awesomeness just a little bit at a time. Sun, 07 Mar 2010 22:37:43 -0800 http://wordpress.org/?v=2.9.2 hourly 1 Comment on Horrible RoadRunner Performance – Shame on Time Warner Cable of New York City by Cablevision’s Business Model is the Problem - NevDull’s Take On Things http://www.nevdull.com/2008/01/25/horrible-roadrunner-performance-shame-on-time-warner-cable-of-new-york-city/comment-page-1/#comment-51064 Cablevision’s Business Model is the Problem - NevDull’s Take On Things Sun, 07 Mar 2010 22:37:43 +0000 http://www.nevdull.com/2008/01/25/horrible-roadrunner-performance-shame-on-time-warner-cable-of-new-york-city/#comment-51064 [...] 3.0, I get 50Mbps down, 5Mbps up. And I actually get it. Since I’ve posted before about the negative experiences I had with Time Warner’s RoadRunner service at a previous apartment, I’ll update it with some information about how one individual turned around my customer [...] [...] 3.0, I get 50Mbps down, 5Mbps up. And I actually get it. Since I’ve posted before about the negative experiences I had with Time Warner’s RoadRunner service at a previous apartment, I’ll update it with some information about how one individual turned around my customer [...]

]]> Comment on Bed Bath and Beyond and its Relationship to Customers by formerbbbemployeeandhappy http://www.nevdull.com/2007/01/29/bed-bath-and-beyond-and-its-relationship-to-customers/comment-page-1/#comment-51063 formerbbbemployeeandhappy Wed, 24 Feb 2010 14:03:38 +0000 http://www.nevdull.com/2007/01/29/bed-bath-and-beyond-and-its-relationship-to-customers/#comment-51063 first let me say that out of all these posts very few were positive. AS for jane doe - you are brainwashed and actually believe what they tell you. I was a sm for 6 years and finally quit before that job killed me - literally. they dont care about anything but money and if you believe otherwise you are an idiot. they keep employees like vivky perez who is the biggest loser going and is the worst dm i have ever worked for. she has no people skills because she is an old spinster who is reallllly frustrated. they will go out of business because of their arogant attitude and i will love it. the district staff is useless and they dont even work 40 hrs a week. they are so shady that they have asked me, a number of times, to set mgrs and employees up so we can write them up and fire them. i hate them and it took me about 6 months to get them out of my system - its like a cult over there! get out while you can! first let me say that out of all these posts very few were positive. AS for jane doe – you are brainwashed and actually believe what they tell you. I was a sm for 6 years and finally quit before that job killed me – literally. they dont care about anything but money and if you believe otherwise you are an idiot. they keep employees like vivky perez who is the biggest loser going and is the worst dm i have ever worked for. she has no people skills because she is an old spinster who is reallllly frustrated. they will go out of business because of their arogant attitude and i will love it. the district staff is useless and they dont even work 40 hrs a week. they are so shady that they have asked me, a number of times, to set mgrs and employees up so we can write them up and fire them. i hate them and it took me about 6 months to get them out of my system – its like a cult over there! get out while you can!

]]> Comment on Why RAID 10 doesn’t help on EBS by Ken Chase http://www.nevdull.com/2008/08/24/why-raid-10-doesnt-help-on-ebs/comment-page-1/#comment-51058 Ken Chase Fri, 05 Feb 2010 18:20:12 +0000 http://www.nevdull.com/?p=152#comment-51058 Why is everyone talking about RAW total performance? I dont know many applications that really need even 10MB of data written sync() to disk and returning in 0.1s. That's a *HUGE* amount of bandwidth to continually deal with, even if you only get 1 request every 5 seconds. Very very few applications require this design (there are some that do, but most LAMP installs running a website with a mysql back end DO NOT). Why doesnt anyone talk about random seeks per second? I do most of my bonnies with -s 0 and -n 512:1000:0:512 -b to ignore the total throughput and see how fast it can write 512*1024 1K files to disk - SYNC (so we dont get buffering help, since mysql doesnt use it, yes i know inno has its own buffering management) - but that gives me AN IDEA of what the drive seek and random write performance is. Random reads isnt as critical to me, more ram will help with that, which is why it's important to keep your database files smaller than your free cache ram - wasted space in databases means you cant hold most of your DB in cache, and you'll be going to disk to retrieve data instead. Bad design. Writes, esp sync writes, are the costly thing (though EC2 instances seem to be tuned to have *HUGE* buffers, ive seen 800mb before! tho sync() writes wont use that) - so make sure whatever you are using sync() for NEEDS to survive a crash/reboot, cuz that's what sync is for. If you can design around async writes, and avoid full ACID db compliance, do it. (memcached sped up my one customer's front page load by 2x and reduced cpu usage by 5x and disk usage by 10x). Why is everyone talking about RAW total performance?

I dont know many applications that really need even 10MB of data written sync() to disk and returning in 0.1s. That’s a *HUGE* amount of bandwidth to continually deal with, even if you only get 1 request every 5 seconds. Very very few applications require this design (there are some that do, but most LAMP installs running a website with a mysql back end DO NOT).

Why doesnt anyone talk about random seeks per second? I do most of my bonnies with -s 0 and -n 512:1000:0:512 -b to ignore the total throughput and see how fast it can write 512*1024 1K files to disk – SYNC (so we dont get buffering help, since mysql doesnt use it, yes i know inno has its own buffering management) – but that gives me AN IDEA of what the drive seek and random write performance is.

Random reads isnt as critical to me, more ram will help with that, which is why it’s important to keep your database files smaller than your free cache ram – wasted space in databases means you cant hold most of your DB in cache, and you’ll be going to disk to retrieve data instead. Bad design.

Writes, esp sync writes, are the costly thing (though EC2 instances seem to be tuned to have *HUGE* buffers, ive seen 800mb before! tho sync() writes wont use that) – so make sure whatever you are using sync() for NEEDS to survive a crash/reboot, cuz that’s what sync is for. If you can design around async writes, and avoid full ACID db compliance, do it. (memcached sped up my one customer’s front page load by 2x and reduced cpu usage by 5x and disk usage by 10x).

]]> Comment on Why RAID 10 doesn’t help on EBS by Amazon EC2 Disk Performance and Why RAID 10 is bad for EBS http://www.nevdull.com/2008/08/24/why-raid-10-doesnt-help-on-ebs/comment-page-1/#comment-51056 Amazon EC2 Disk Performance and Why RAID 10 is bad for EBS Tue, 19 Jan 2010 18:03:45 +0000 http://www.nevdull.com/?p=152#comment-51056 [...] on cloud-based performance. Today, I am looking at the performance of EBS on Amazon and the use of RAID 10 for disk writes. If you have a lot of writes to disk, then seriously consider something other than RAID 10. [...] [...] on cloud-based performance. Today, I am looking at the performance of EBS on Amazon and the use of RAID 10 for disk writes. If you have a lot of writes to disk, then seriously consider something other than RAID 10. [...]

]]> Comment on Horrible RoadRunner Performance – Shame on Time Warner Cable of New York City by Abid http://www.nevdull.com/2008/01/25/horrible-roadrunner-performance-shame-on-time-warner-cable-of-new-york-city/comment-page-1/#comment-51054 Abid Tue, 05 Jan 2010 14:08:56 +0000 http://www.nevdull.com/2008/01/25/horrible-roadrunner-performance-shame-on-time-warner-cable-of-new-york-city/#comment-51054 I pay around 70 bucks for the 20mbps connection and have the exact same issue. My connection speed this morning was 561kbps. That is waaaay off. Class action lawsuit? i'm down I pay around 70 bucks for the 20mbps connection and have the exact same issue. My connection speed this morning was 561kbps. That is waaaay off.

Class action lawsuit? i’m down

]]> Comment on Bed Bath and Beyond and its Relationship to Customers by BedBathVP Satan http://www.nevdull.com/2007/01/29/bed-bath-and-beyond-and-its-relationship-to-customers/comment-page-1/#comment-51047 BedBathVP Satan Sun, 13 Dec 2009 07:50:30 +0000 http://www.nevdull.com/2007/01/29/bed-bath-and-beyond-and-its-relationship-to-customers/#comment-51047 I will find out who you all are and fire you. If you already quit, I will call all my "contacts" and blackball you. I am Satan and I rule. BBB is my domain. Bring me 3 sexy associates to do my bidding now. Hugs and Kisses Satan I will find out who you all are and fire you. If you already quit, I will call all my “contacts” and blackball you.

I am Satan and I rule. BBB is my domain. Bring me 3 sexy associates to do my bidding now.

Hugs and Kisses
Satan

]]> Comment on If a picture’s worth a thousand words… by Amy@OldSweetSong http://www.nevdull.com/2009/12/02/if-a-pictures-worth-a-thousand-words/comment-page-1/#comment-51042 Amy@OldSweetSong Tue, 08 Dec 2009 00:17:06 +0000 http://www.nevdull.com/?p=196#comment-51042 I'm creeped out! I’m creeped out!

]]> Comment on GNU seq’s cousin on FreeBSD is… jot by cactus http://www.nevdull.com/2007/09/24/gnu-seqs-cousin-on-freebsd-is-jot/comment-page-1/#comment-50955 cactus Fri, 04 Dec 2009 04:44:55 +0000 http://www.nevdull.com/2007/09/24/gnu-seqs-cousin-on-freebsd-is-jot/#comment-50955 oops. Should have been "echo $i". ;) oops.
Should have been “echo $i”.
;)

]]> Comment on GNU seq’s cousin on FreeBSD is… jot by cactus http://www.nevdull.com/2007/09/24/gnu-seqs-cousin-on-freebsd-is-jot/comment-page-1/#comment-50954 cactus Fri, 04 Dec 2009 04:44:02 +0000 http://www.nevdull.com/2007/09/24/gnu-seqs-cousin-on-freebsd-is-jot/#comment-50954 Or just use bash. for i in {1..10}; do echo $x; done Or just use bash.

for i in {1..10}; do echo $x; done

]]> Comment on Bed Bath and Beyond and its Relationship to Customers by fd http://www.nevdull.com/2007/01/29/bed-bath-and-beyond-and-its-relationship-to-customers/comment-page-1/#comment-50814 fd Sat, 28 Nov 2009 00:47:24 +0000 http://www.nevdull.com/2007/01/29/bed-bath-and-beyond-and-its-relationship-to-customers/#comment-50814 I just went to bbb for the first time and was shocked at their prices. 30 dollars for a little wastebin for the bathroom?? I just moved and needed a shower curtain and laundry baskets. Not only are their prices ridiculous, but the selection actually sucks. I will never go back. Between Target and Walmart you can everything they have, better, and cheaper. I just went to bbb for the first time and was shocked at their prices. 30 dollars for a little wastebin for the bathroom?? I just moved and needed a shower curtain and laundry baskets. Not only are their prices ridiculous, but the selection actually sucks. I will never go back. Between Target and Walmart you can everything they have, better, and cheaper.

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