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anoland
Tux's lil' helper
Joined: 27 May 2003
Posts: 86
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 Posted: Fri Jul 01, 2005 7:46 pm Post subject: Distributed filesystems???? |
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I was reading this article about AoE over at linuxjournal and realized I have the same question as this guy on Slashdot. The askSlashdot is 6 years old. Most of the reponses suggest either AFS or CODA. How far have CODA, AFS, Intermezzo, et. al. progressed isince then? I don't know enough about DFS's to make an educated guess.
Also, how are AoE and nbd (networkblock device) alike and different? How well does nbd handle being part of a RAID?
What would be the gentoo-friendly way to build what is essentially a SAN for the home network?
Thanks for the input. |
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scottfk
n00b
Joined: 18 May 2003
Posts: 44
Location: New York, NY
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| Posted: Sat Jul 02, 2005 2:10 pm Post subject: |
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Either Coda is dead, or it is on a release schedule that makes the HURD look speedy. I have never touched Intermezzo.
AFS... alive and well in the OpenAFS project (http://www.openafs.org/). I have used/supported/managed AFS (first the IBM/Transarc version, then OpenAFS) in an enterprise setting, and frankly I loved it. It is robust, the unified namespace makes it suitable for a global enterprise, the built-in Kerberos and ACL functionality are far superior to the ACL hacks on NFS, and the "for free" backups via snapshots are great for when lusers delete their files.
AoE and NBD and SAN are different... they work at a lower level than AFS. They are all ways of presenting what appears to be a block device to a system. You would layer AFS or NFS or whatever on top of one of those solutions.
Are you sure you want a SAN and not a NAS?
_________________
Be seeing you.
scott |
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anoland
Tux's lil' helper
Joined: 27 May 2003
Posts: 86
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| Posted: Sun Jul 03, 2005 3:14 pm Post subject: |
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| scottfk wrote: | | Are you sure you want a SAN and not a NAS? |
Dunno. What is the difference? |
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groovin
Guru
Joined: 07 Feb 2004
Posts: 429
Location: California, USA
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| Posted: Wed Jul 13, 2005 3:57 pm Post subject: |
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| Quote: | | Dunno. What is the difference? |
about $100K
ok well maybe not. cheap SANs run for $35K (from big vendors) and expensive NAS can run pretty high. the difference is a SAN is basically a subnetwork of storage devices connecting over high speed links (fabric) like fiber. there is one or more SAN gateways which make the storage available. the data sent from the SAN storage devices to the gateway are sent over some block emulating protocol, usually emulates scsi. NAS i guess you can think of as a big fat multi protocol supporting storage server sitting either on a SAN or directly on a network. i might not be accurate on some of this, perhaps someone can correct me? |
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