zfs and largefiles
in [Solaris]
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From: Dave Uhring on 5 May 2008 00:07 On Mon, 05 May 2008 02:49:56 +0000, CJT wrote: > Dave Uhring wrote: >> http://blogs.sun.com/BVass/resource/SolarisRHELWinComparison.pdf >> >> 2^64 bytes > > Whatever. Historically, the maximum didn't necessarily take effect by > default -- hence the "largefiles" attribute. I know you're aware of it. Indeed. But it looks like there's a lot of change with ZFS. You know logging used to be off by default, too. Making that the default has undoubtedly saved countless hours of time running fsck.
From: Darren Dunham on 5 May 2008 12:45 CJT <abujlehc(a)prodigy.net> wrote: > Whatever. Historically, the maximum didn't necessarily take effect by > default -- hence the "largefiles" attribute. Actually, on Solaris UFS "largefiles" has always been the default. (You may be thinking about the behavior of VxFS). With UFS, you might create and use a filesystem on one machine and want to mount it on a non-largefile-aware OS (such as 2.5.1 and earlier). Being able to prevent the creation of "large" files on the filesystem is handy. To that end, you have the 'largfiles/nolargefiles' mount options. There's no expectation that such OSs can mount a ZFS filesystem, so the mount options appear unnecessary. -- Darren Dunham ddunham(a)taos.com Senior Technical Consultant TAOS http://www.taos.com/ Got some Dr Pepper? San Francisco, CA bay area < This line left intentionally blank to confuse you. >
From: CJT on 6 May 2008 00:14 Dave Uhring wrote: > On Mon, 05 May 2008 02:49:56 +0000, CJT wrote: > >>Dave Uhring wrote: > > >>>http://blogs.sun.com/BVass/resource/SolarisRHELWinComparison.pdf >>> >>>2^64 bytes >> >>Whatever. Historically, the maximum didn't necessarily take effect by >>default -- hence the "largefiles" attribute. I know you're aware of it. > > > Indeed. But it looks like there's a lot of change with ZFS. You know > logging used to be off by default, too. Making that the default has > undoubtedly saved countless hours of time running fsck. > Amen to that. -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form che...(a)prodigy.net.
From: Andrew Gabriel on 6 May 2008 03:29
In article <481DC280.4000000(a)prodigy.net>, CJT <abujlehc(a)prodigy.net> writes: > Apparently zfs file systems are not mounted with attribute largefiles by > default, and I haven't been able to find in the documentation how to set > it. Can somebody point me in the right direction? largefiles is a ufs specific option. The reason for it was to enable a ufs filesystem to be mounted on a Solaris 2.6 or later system, without risk of having large files created which would cause problems if it was later mounted on an earlier OS release which didn't know about large files. None of that is relevant to zfs. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |