svn commit: r318757 - head

[Ngie Cooper (yaneurabeya)]

> On May 23, 2017, at 14:33, Alexey Dokuchaev <danfe at freebsd.org> wrote:
> 
> On Tue, May 23, 2017 at 08:25:49PM +0000, Ed Maste wrote:
>> New Revision: 318757
>> URL: https://svnweb.freebsd.org/changeset/base/318757
>> 
>> Log:
>>  Add note to UPDATING for ino64 to follow the standard upgrade process
>> ...
>> +20170523:
>> +	The "ino64" 64-bit inode project has been committed, which extends
>> +	a number of types to 64 bits.
> 
> For the dumb people among us, what is it all about?  E.g., what's so cool
> about it?

	64-bit inodes: more addressable inodes for bigger filesystems/disks.
	From https://lists.freebsd.org/pipermail/freebsd-fs/2017-April/024684.html :

“”"
Inodes are data structures corresponding to objects in a file system,
such as files and directories. FreeBSD has historically used 32-bit
values to identify inodes, which limits file systems to somewhat under
2^32 objects. Many modern file systems internally use 64-bit identifiers
and FreeBSD needs to follow suit to properly and fully support these
file systems.
“””

	With Isilon OneFS we currently support multiples of petabytes of storage ( https://www.emc.com/collateral/hardware/white-papers/h10719-isilon-onefs-technical-overview-wp.pdf ), so this matters very much to us. It’s also useful for other file systems though (assuming they can scale that high).
Cheers,
-Ngie
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