Comments on: Hard Drives Are Arcane Technology. So Why Can’t I Realize Their Full Bandwidth Potential? http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/ Oracle-related Platform, Storage and Clustering Topics (with the occasional rant) Mon, 13 Oct 2008 15:19:55 +0000 http://wordpress.org/?v=MU hourly 1 By: billy bathgates http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-32481 billy bathgates Tue, 11 Mar 2008 18:28:18 +0000 http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-32481 I think the idea is that if you are doing any amount of random I/O, the per disk throughput drops enormously, and you will not bottleneck the disks in a typical configuration. Even if it's sequential, you will be driving many many servers at the data rates you are talking about. Maybe there is an element of randomness introduced by 'context switching' on the disks with that many streams, if that makes any sense? I think the idea is that if you are doing any amount of random I/O, the per disk throughput drops enormously, and you will not bottleneck the disks in a typical configuration.

Even if it’s sequential, you will be driving many many servers at the data rates you are talking about. Maybe there is an element of randomness introduced by ‘context switching’ on the disks with that many streams, if that makes any sense?

]]> By: Comment on Hard Drives Are Arcane Technology. So Why Can’t I … http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-32400 Comment on Hard Drives Are Arcane Technology. So Why Can’t I … Fri, 22 Feb 2008 01:24:18 +0000 http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-32400 [...] ArchivesNext wrote an interesting post today onHere’s a quick excerpt [...] [...] ArchivesNext wrote an interesting post today onHere’s a quick excerpt [...]

]]> By: Proof-Positive: Memory is Faster Than Disk. Don’t Need No Book Learnin’ to Cipher That One. « Kevin Closson’s Oracle Blog: Platform, Storage & Clustering Topics Related to Oracle Databases http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-32397 Proof-Positive: Memory is Faster Than Disk. Don’t Need No Book Learnin’ to Cipher That One. « Kevin Closson’s Oracle Blog: Platform, Storage & Clustering Topics Related to Oracle Databases Thu, 21 Feb 2008 22:53:27 +0000 http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-32397 [...] Hard Drives Are Arcane Technology. So Why Can’t I Realize Their Full Bandwidth Potential? [...] [...] Hard Drives Are Arcane Technology. So Why Can’t I Realize Their Full Bandwidth Potential? [...]

]]> By: What Oracle Topic Is On Your Coffee Table? « Kevin Closson’s Oracle Blog: Platform, Storage & Clustering Topics Related to Oracle Databases http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-23650 What Oracle Topic Is On Your Coffee Table? « Kevin Closson’s Oracle Blog: Platform, Storage & Clustering Topics Related to Oracle Databases Thu, 06 Sep 2007 00:38:06 +0000 http://kevinclosson.wordpress.com/2007/08/13/hard-drives-are-archane-technology-why-cant-i-realize-their-full-bandwidth-potential/#comment-23650 [...] to sift through old posts to answer that definitively, but one recent post comes to mind. I think my recent post about why Oracle shops generally aren’t realizing the full potential of their h... is one of my favorites.  The topic in that blog post weighs quite heavily on my mind now that [...] [...] to sift through old posts to answer that definitively, but one recent post comes to mind. I think my recent post about why Oracle shops generally aren’t realizing the full potential of their h… is one of my favorites.  The topic in that blog post weighs quite heavily on my mind now that [...]

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