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Recent MD enhancementsRecent MD enhancementsPosted Jan 26, 2006 14:18 UTC (Thu) by brugolsky (subscriber, #28)Parent article: MD / DM
Jon, there are lots of other important MD patches that have gone in recently that probably deserve an article of their own. In particular, the capability to rewrite a stripe when a read error occurs means that MD can often recover from an error, rather than kick the drive out of the array. One can also proactively do a background scan, like many hardware RAID controllers. Additionally, bitmapped-based intent logging allows for faster resyncs, when required. Given the nature of today's huge drives, these changes greatly increase the utility of MD, as resyncing a 500GB drive on a busy server can take days if it is only resyncing at say, 5MB/s, and runs the risk of exposing a latent error on another drive.
These and other recent changes have brought MD robustness and usability much closer to that offered by expensive hardware RAID implementations, while maintaining all of the flexibility, transparency, and performance that has long been the hallmark of Linux MD.
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Recent MD enhancements Posted Jan 26, 2006 15:39 UTC (Thu) by hmh (subscriber, #3838) [Link] Agreed. A full article on Linux MD which describes _all_ current and soon-upcoming capabilities would be quite welcome IMHO.
Recent MD enhancements Posted Jan 27, 2006 15:36 UTC (Fri) by knobunc (subscriber, #4678) [Link] I would love to see that too. I am a grateful (and heavy) user of the Linux MD stuff and would be very interested in learning about the new features, and tips and pitfalls associated with them.
-ben
another bonus Posted Feb 2, 2006 21:27 UTC (Thu) by niner (subscriber, #26151) [Link] Is to have some comparison benchmarks in such an article with some hardware RAID controllers. While I love the advantages of a Linux software RAID, I'd really like to know how much they cost performance wise compared to hardware solutions.
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