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No, it's completely unrelated.

No, it's completely unrelated.

Posted Jun 4, 2009 12:03 UTC (Thu) by drag (subscriber, #31333)
In reply to: No, it's completely unrelated. by bronson
Parent article: Xen again

No clue about plan9.

But DRBD is a way of keeping volumes in sync, not so much a file system.

The easiest FS to administer that I know of is sshfs. I use it heavily and it is stable and actually very fast. It can beat NFS even sometimes.. And all you need is Openssh server running and a fuse support in the client. The ssh server is the real gauge on how well sshfs works. Anything other then a relatively recent version of OpenSSH and I doubt the results will be that good.

But if DRBD was even being considured then your needs are going to be specialized. Other alternative to look at could possibly be Redhat's GNBD from GFS or ISCSI.


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No, it's completely unrelated.

Posted Jun 4, 2009 19:32 UTC (Thu) by bronson (subscriber, #4806) [Link]

Tried sshfs 5 or so years ago, rejected it because the crypto overhead prevented me from filling a 100 MBit link. I should probably try it again since that won't be a problem nowadays.

I only mentioned DRBD to illustrate how desperate I've become! It was actually pretty good except that I couldn't get the split brain recovery to work the way I wanted. So close and yet so far. Haven't gotten desperate enough to try AFS yet!

Why doesn't 9p or webdav or some simple protocol take off? It's amazing to me that NFS and CIFS are still state of the art. I guess I don't understand the trade-offs very well.

No, it's completely unrelated.

Posted Jun 4, 2009 20:20 UTC (Thu) by drag (subscriber, #31333) [Link]

For sshfs if you want to have good performance you need to disable compression. If you think the crypto has to much overhead then change the encryption method to RC4.

Very likely you were running something like 3DES that has very high overhead. And like I said you need to have a relatively recent version of OpenSSH (say a version from the past 2 years or so) for reliable service.

You can set these on a per server basis in your ~/.ssh/config

I have had no problem personally beating NFS when it comes to my personal usage at home over wireless and gigabit link.. although of course this sort of thing is not suitable for large numbers of users.

:)


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