On 2011-07-04, at 2:54 AM, Ric Wheeler wrote: > On 07/04/2011 01:23 AM, Theodore Ts'o wrote: >> I've made the first WIP release of e2fsprogs 1.42. The primary purpose >> is for people to test the 64-bit functionality and be confident that we >> didn't introduce any 32-bit regressions. >> >> ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/e2fsprogs-1.42-WIP-0702.tar.gz >> >> This has been built for Debian unstable, so we can get some initial >> testing. > > Thanks Ted! > > Do we have a specific idea of who is going to be testing and on what size > file systems? > > We might want to see about getting this ready for Fedora as well at some point.... Ric, we have been doing fairly thorough testing at 24TB, because that is the LUN size when using 3TB drives in RAID-6 8+2 config. One caveat is that this is only on the Lustre data servers, so it doesn't exercise namespace operations and external xattrs very much, since there is no benefit to large LUNs on the metadata server due to the 4B inode limit. We have also done some testing up to 128TB, which works fine if the filesystem passes the initial mount, but has occasional problems at mount due to kmalloc() failures of large data structs, with oops at ext4_fill_super() cleanup (http://jira.whamcloud.com/browse/LU-136 and http://jira.whamcloud.com/browse/LU-477). The oops is completely unrelated to >16TB LUN support, but is in generic error handling in ext4_fill_super(). Hopefully now that the developer doing this testing has finished testing 24TB LUNs, she will be able to work on issues we've found with 128TB+ LUNs. In our admittedly unrealistic circumstances, e2fsck run time is very short, due to flex_bg, uninit_bg, and extents avoiding a lot of seeking and unnecessary IO. With "lazy_journal_init" and "lazy_itable_init" the mke2fs time is also very short. Cheers, Andreas -- 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
