On Thu, September 16, 2010 14:04, Miles Nordin wrote: >>>>>> "dd" == David Dyer-Bennet <d...@dd-b.net> writes: > > dd> Sure, if only a single thread is ever writing to the disk > dd> store at a time. > > video warehousing is a reasonable use case that will have small > numbers of sequential readers and writers to large files. virtual > tape library is another obviously similar one. basically, things > which used to be stored on tape. which are not uncommon.
Haven't encountered those kinds of things first-hand, so I didn't think of them. Yes, those sound like they'd have lower numbers of simultaneous users by a lot for one reason or another. > AIUI ZFS does not have a fragmentation problem for these cases unless > you fill past 96%, though I've been trying to keep my pool below 80% > because <general FUD>. As various people have said recently, we have no way to measure it that we know of. I don't feel I have a problem in my own setup, but it's so low-stress that if ZFS doesn't work there, it wouldn't work anywhere. > dd> This situation doesn't exist with any kind of enterprise disk > dd> appliance, though; there are always multiple users doing > dd> stuff. > > the point's relevant, but I'm starting to tune out every time I hear > the word ``enterprise.'' seems it often decodes to: Picked the phrase out of an orifice; trying to distinguish between storage for key corporate data assets, and other uses. > (1) ``fat sacks and no clue,'' or > > (2) ``i can't hear you i can't hear you i have one big hammer in my > toolchest and one quick answer to all questions, and everything's > perfect! perfect, I say. unless you're offering an even bigger > hammer I can swap for this one, I don't want to hear it,'' or > > (3) ``However of course I agree that hammers come in different > colors, and a wise and experienced craftsman will always choose > the color of his hammer based on the color of the nail he's > hitting, because the interface between hammers and nails doesn't > work well otherwise. We all know here how to match hammer and > nail colors, but I don't want to discuss that at all because it's > a private decision to make between you and your salesdroid. > > ``However, in this forum here we talk about GREEN NAILS ONLY. If > you are hitting green nails with red hammers and finding they go > into the wood anyway then you are being very unprofessional > because that nail might have been a bank transaction. --posted > from opensolaris.org'' #3 is particularly amusing! -- David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
