Hello, During the last year Ottawa Linux Symposium there was a presentation of open-souce implementation of Hierarchical Storage Management framework for Linux. See: http://www.kernel.org/doc/ols/2009/ols2009-pages-263-274.pdf AFAK it is only a prototype, works only with ext2/ext3 and no other open-source storage system offers anything like this just yet. So I guess you have to wait a little. But it sounds like useful feature and it would be nice if Ceph can do something like that. Would it be possible for Ceph to change data placement depending on by example file popularity? Ales Blaha
------------ Původní zpráva ------------ Od: Tomasz Chmielewski <mangoo@xxxxxxxx> Předmět: Re: ceph, slow (cheap) and fast (expensive) storage? Datum: 08.6.2010 14:04:17 ---------------------------------------- Am 08.06.2010 12:53, Wido den Hollander wrote: > Hi, > > I'm not aware of any of those features in Ceph and i don't think that it > will be possible in the near future. > > But while thinking about it, is ZFS an option for you? You could then > use a lot of SATA disks and add some SAS disks for your caching. ZFS > will then place the most used blocks on the SAS disks. Not sure, perhaps not. I was thinking of something in the line of: http://en.wikipedia.org/wiki/Hierarchical_storage_management -- Tomasz Chmielewski http://wpkg.org -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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