tag:blogger.com,1999:blog-2173119910600284569.post769554740627313131..comments2024-02-06T04:58:09.639-05:00Comments on Kendal Van Dyke: Disk Performance Hands On: Series RecapUnknownnoreply@blogger.comBlogger6125tag:blogger.com,1999:blog-2173119910600284569.post-63194056363861255702019-07-17T09:01:42.276-04:002019-07-17T09:01:42.276-04:00Excellent work. One very important test is missing...Excellent work. One very important test is missing though. What about the time of resilvering / disaster recovery? I understand there is an impact on this. With RAID5 paraties have to be calculated, with RAID10 the data has merely to be copied from the working disk on the replacement. And recovery is the sole reason for any RAID (except 0). Johanneshttps://www.blogger.com/profile/02465856776883634147noreply@blogger.comtag:blogger.com,1999:blog-2173119910600284569.post-71399454519816054472010-04-08T15:25:34.654-04:002010-04-08T15:25:34.654-04:00i guess question is how badly that 5% writing is ...i guess question is how badly that 5% writing is killing the server.Anonymoushttps://www.blogger.com/profile/18093067446218910431noreply@blogger.comtag:blogger.com,1999:blog-2173119910600284569.post-85823139705598809052009-02-23T18:03:00.000-05:002009-02-23T18:03:00.000-05:00Yah but say your workload was 95% read\5% write wo...Yah but say your workload was 95% read\5% write wouldn't RAID 5 make sense?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2173119910600284569.post-50574936567565425392009-02-22T05:32:00.000-05:002009-02-22T05:32:00.000-05:00Kendal, I want to say a big thank you for putting ...Kendal, I want to say a big thank you for putting together this fantastic series. I have no doubt it took quite some time to produce and I for one certainly appreciate your efforts.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2173119910600284569.post-14994466511819731342009-02-20T18:46:00.000-05:002009-02-20T18:46:00.000-05:00The increase in read performance when using RAID 5...The increase in read performance when using RAID 5 instead of RAID 10 comes at the HUGE hit RAID 5 takes on write performance (~66%).<BR/><BR/>I went into great detail on this in part 5 of the series, but I can see how I may have mangled the wording of it in this recap. I will edit to make it clearer.Adminhttps://www.blogger.com/profile/10237600176486018239noreply@blogger.comtag:blogger.com,1999:blog-2173119910600284569.post-42986165961325457842009-02-20T18:25:00.000-05:002009-02-20T18:25:00.000-05:00I have to dispute the RAID5 tests. I have not test...I have to dispute the RAID5 tests. I have not tested myself but something has to be wrong. I would gladly take a 10-15% gain for read performance on the data drive for most workloads. However, everywhere else says RAID10, RAID10, RAID10. Could it be the controller, cache, something else?Anonymousnoreply@blogger.com