On Wed, 16 Jan 2013 18:47:14 -0800 Dan Mick <dan.mick@xxxxxxxxxxx> wrote: > Hi, all. I recently hacked at bs_rdwr and made it work as a > proof-of-concept driver allowing tgt to be backed by the Ceph[1] > storage cluster's RADOS block device (rbd)[2]. I thought I'd share > the results of my investigations, as it's useful even in its current > form: Sounds interesting. If you send a patch, I'm happy to review and merge it. > http://github.com/dmick/tgt, forked from http://github.com/fujita/tgt > branch bs_rbd (https://github.com/dmick/tgt/tree/bs_rbd) > > This is a simple transliteration of bs_rdwr to use librbd/librados > calls instead of normal file I/O calls (so might be instructive to > diff bs_rbd.c against bs_rdwr.c to see what was involved). It > currently uses only the synchronous librbd interfaces, so each tgtd > worker thread will block for completion of each request. See the That's fine. I/O worker threads are supposed to handle such synchronous API (bs_rwdr.c use read/write system calls with O_SYNC). If rdb provides the async API and it's preferable, then you don't need to use I/O worker threads like bs_aio.c > I was quite impressed at how easy this was, and how well-organized the > stgt source is. Kudos to the developers and maintainers! Thanks ;) -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
