Am 02.03.2014 01:36, schrieb Chris Murphy: > On Mar 1, 2014, at 4:51 PM, Reindl Harald <h.reindl@xxxxxxxxxxxxx> wrote: > >> Am 02.03.2014 00:42, schrieb Chris Murphy: >>> >>> On Mar 1, 2014, at 4:26 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: >>> >>>> >>>> On Mar 1, 2014, at 2:16 PM, Matthew Miller <mattdm@xxxxxxxxxxxxxxxxx> wrote: >>>> >>>>> On Fri, Feb 28, 2014 at 11:29:30PM -0700, Chris Murphy wrote: >>>>>> - There needs to be a mandate to remove features from custom partitioning >>>>>> that quite frankly don't make sense like rootfs on raid4, raid5 or >>>>>> raid6. OK maybe raid5. But not raid 4 or raid 6. There are other >>>>> >>>>> Okay, I'll bite. Why not rootfs on raid6? >>>> >>>> It's pathological. There are too many simpler, faster, more resilient options considering rootfs at most isn't bigger than the average SSD: Two or three SSDs + n-way mirroring. RAID 10. Or RAID 1 + linear + XFS for deterministic workloads. >>> >>> Those three examples are simpler, more resilient, easier to configure and maintain, perform better, with faster rebuild times than RAID 6 which also has a high read-modify-write penalty. I left that part out. >> >> yes, but RAID6 allows a disk-fault *while* rebuild the RAID after the first one >> RADID 10 *may* do the same if the *right* second disk fails > > If you need two disk failure tolerance use n-way mirroring with three disks, anaconda supports this and if you need failure tolerance *and* performance? yes, then use commercial SAN storages...
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