For those of us who are behind on filesystem terminology, I found "OST" = "Objective Storage Target" at http://www.ncsa.uiuc.edu/UserInfo/Resources/Hardware/News/tungsten/ByDate/Lustre_Striping.html Peter ("a TLA without a Wiki entry is Obscure")
On 9/12/07, Mark Hahn <[EMAIL PROTECTED]> wrote: > > > I'm not sure if everyone has seen this yet, but Sun just bought Cluster > > File System (Lustre): > > wow, that's a bit of a shock. I had heard mutterings about CFS using ZFS, > but would not have guessed a buyout. where does that leave HP, for > instance? or even SGI, who seem to now be promoting Lustre for their > new blade clusters... > > the combination of ZFS and Luster is a bit strange to contemplate: > > - Lustre's main thing is to set up client-OST parallel streams > and then get out of the way. it uses a single metadata server, > which can be a bottleneck for non-giant-stream workloads, and > which currently stores per-file ost-mapping info via EAs in an > ext3 FS. OST'S don't need much functionality in their local FS, > and use ext3 (with extents) as well. > > - ZFS's main thing is managing storage pools directly so as to > provide intelligent file-level redundancy. and it has comfortingly > high size limits and some nice integrity features. but afaik, > no provisions at all for clustering or parallel access. > > I guess you could broadly compare CFS's OST's to ZFS's storage pools > (sorry, don't know the ZFS terminology). but "clusterizing" the metadata > logic of ZFS (parallelizing it and presumably distributing it across > clients) > sounds kind of tricky. > > (I confess my only experience is with HP's SFS version of Luster, and none > at all with ZFS.) > _______________________________________________ > Beowulf mailing list, [email protected] > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf >
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