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Re: [BackupPC-users] Best NAS device to run BackupPC ?
2011-05-17 14:06:02
"Jeffrey J. Kosowsky" <backuppc AT kosowsky DOT org>
wrote on 05/17/2011 01:11:16 PM:
> I haven't noticed any NFS problems due to hard links.
> I get approximately the same speed of transfer operations when I am
> reading/writing regular file or massively hard-linked ones.
>
> In my experience, the issue with hard links (e.g., rsync copying of
> the pool) has nothing to do with NFS (or any file system for that
> matter).
>
> Do you have any data supporting your claim that NFS suffers more than
> other filesystems with massive hard links?
>
> Again, the only issue I have with NFS is that it is relatively slow
> when accessing large numbers of small files due to the protocol
> overhead. But even so, it is quite workable even on a 100MHz ethernet.
Woah! I take it all back! Feel free to
use NFS: go nuts. Is NFS' honor now sufficiently defended?!?
Do I have "data"? Like a peer-reviewed
paper presented at a prestigious conference? No. Like everyone
else, I have anecdotes, and I know that the plural of anecdote is not data.
However, I've got about 15 years of hard-fought experience
that tells me that there are too many corner-cases that makes NFS in this
application a... challenging choice.
Throw in the fact that in 98% of the time (and no,
I have no "data" for that statistic, either), when someone says
"NAS" they mean "extremely low-end NAS", and a device
designed with the realization that 98% of the time it will be accessed
via SMB *exclusively*. For such a device, NFS support is *merely*
a checkbox. I've worked with 4 or 5 brands of these things, and *EVERY*
one of them has had *some* sort of weridness with NFS: permissions,
extended attributes, whatever.
For those willing to compile their own Linux kernel
or build their own distribution for an embedded device these are probably
not limitations: 'tis just a flesh wound. For most everyone
else, it's often not something you want to fight through for a device that
is designed to protect their data against disaster...
But like I said, go nuts with NFS. And if it
works, great.
Timothy J. Massey
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