On Tue, Jun 30, 2009 at 5:58 PM, Eric Sandeen<sandeen@xxxxxxxxxx> wrote: > Shaozhi Ye wrote: > I'll be very interested to see the results. One thing you will need to > look out for (people who know me knew I would say this ;) is volatile > write caches on the storage, and filesystem barrier implementation. I am interested int he numbers too. As to the other dimensions, we plan on investigating this as much as we can given our environment. > To characterize the test, you'll want to be explicit about your storage. > Are they local disks? A Raid controller? If the disks are external to > the server, is power lost to the disks? Do they have write caching > enabled? If so do write barriers from the filesystem pass through to > the storage? This will all be highly relevant to how a power loss will > affect the filesystem. Yup. We plan on detailing these qualities and comparing some of them in the write up when yeshao's work is done. > I'm also curious about whether the tool itself will be available under > an open source license? Other filesystems would benefit from this > testing as well. The end goal is to have a test suite for power loss that we can share with the community. Realize we may send out numbers before sending out the tests. mrubin -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
