4 ms·
Last I checked the ZFS 128 bit values were not byte offsets, but block numbers. So the justification requires over 2^64 blocks, not 2^64 bytes. I calculated i
by sliken 9y ago
Last I checked the ZFS 128 bit values were not byte offsets, but block numbers. So the justification requires over 2^64 blocks, not 2^64 bytes.
I calculated it at some point and it was several years of the entire earths manufacturing capacity for disks in a single filesystem.
[added the missed "several years of"]
- dijit 9y agoIf you accept the default 128k ZFS block size then it's 2,361,183,241,434,822,606,848 bytes, or 2,097,152 PB Or, exactly 2 Zettabytes.
- Rapzid 9y agoAlso, the Z in ZFS :D
- marzell 9y agoSo, if they didn't use 128-bit... they'd have to change the name! /s
- erric 9y ago>The ZFS name is registered as a trademark of Oracle Corporation; although it was briefly given the retrofitted expanded name "Zettabyte File System", it is no longer considered an initialism. —Wikipedia
- bringtheaction 9y agoI don't believe Wikipedia is right. Search site:oracle.com for zettabyte on google and observe the results being documents and blogs from a multitude of years. ZFS being an acronym for Zettabyte File System was neither retrofitted nor all that brief in use it seems. Former employees of Sun Microsystems, I know some of you browse HN. Care to shed some light on this?
- Rapzid 9y agoIndeed, LLNL have a humongo Lustre/ZFS cluster and kickstarted the ZFSoL project(mucho gracias to LLNL and Brian Behlendorf) and they refer to it as a Zettabyte File System.
- bcantrill 9y agoI wasn't in the room when it happened, but I was probably among the first dozen or so to hear the name -- and it was presented to me as both at once: "ZFS" was both "the last word in filesystems" and (conveniently) a zettabyte. I remember Bonwick quickly pointing out that yes, a yottabyte was larger but "YFS" was passed over for obvious reasons.
- krylon 9y agoInterestingly, IBM has a filesystem used on the zOS mainframe OS, that is also called ZFS: https://en.wikipedia.org/wiki/ZFS_(z/OS_file_system) https://en.wikipedia.org/wiki/ZFS_(z/OS_file_system)