NFS Version 4 Update
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1 Connectathon 98 NFS v4 Update Slide 1 of 12 NFS Version 4 Update Brent Callaghan Sun Microsystems, Inc brent@eng.sun.com
2 Connectathon 98 NFS v4 Update Slide 2 of 12 NFS IETF Status 37th IETF San Jose December 96 - Good attendance (~70) Mailing list & Archive - nfs4-wg@sunroof.eng.sun.com - nfsv4-wg-archive Change Control Agreement - IETF must have change control - Agreement based on RFC 1790 (ONCRPC) - Legal Time is inverse of Internet Time - Will be published as an Informational RFC 42nd IETF Chicago August 1998
3 Connectathon 98 NFS v4 Update Slide 3 of 12 Draft WG Charter The objective of this working group is to advance the state of NFS technology by producing a specification for NFS version 4 which will also be submitted as an Internet Standard. NFS version 4 will emphasize the following features: Improved access and good performance on the Internet Strong security with negotiation built into the protocol Better cross-platform interoperability Designed for protocol extensions Others that may be proposed
4 Connectathon 98 NFS v4 Update Slide 4 of 12 nfs4-wg Mailing List 1 akk@eng 2 brent@eng 3 brian.oki@eng 4 bwelch@eng 5 clv@eng 6 corbin@eng 7 frankh@eng 8 geoff.arnold@east 9 gww@ebay 10 hacker@eng 11 smajee@eng 12 shepler@eng 13 hai-yi.cheng@eng 14 hisgen@eng 15 kupfer@eng 16 labiaga@eng 17 lling@eng 18 cfs@eng 19 mahalingam.mani@eng 20 michael.carney@east 21 mre@eng 22 pen@eng 23 Bill.Pittore@East 24 jim.roberts@east 25 robinson@eng 26 sankar.ramamoorthi@eng 27 sohrab.modi@eng 28 staubach@eng 29 thurlow@eng 30 traj@eng 31 alex@veritas.com 32 ampass@ftp.com 33 bae@netapp.com 34 bb+transarc.external.nfs4- wg@transarc.com 35 beepy@netapp.com 36 boris@nextpoint.com 37 btg@cray.com 38 Cyril.Plisko@Orbotech.Co.IL 39 dima@bog.msu.su 40 frank@wins.uva.nl 41 fred@bws.bws.com 42 glowell@engr.sgi.com 43 guy@netapp.com 44 gww@traakan.com 45 hare@netmanage.com 46 ira@ftp.com 47 jdreyer@pobox.com 48 jes@machine.engr.sgi.com 49 Jim.Zelenka@cs.cmu.edu 50 jms@cray.com 51 kane@cisco.com 52 kessler@bigfun.engr.sgi.com 53 kevinw@ancor.com 54 lance@eco.twg.com 55 mckusick@flamingo.mckusick.com 56 mohan@netapp.com 57 moore+nfsv4@cs.utk.edu 58 muralir@auspex.com 59 nfsv4-wg@austin.ibm.com 60 nfsv4@hcl.com 61 okir@monad.swb.de 62 rajen@distinct.com 63 rick@snowhite.cis.uoguelph.ca 64 ruthtang@vnet.ibm.com 65 steved@zk3.dec.com 66 sv@mail.crystaliz.com 67 tg@bosun.bm.lu.se 68 tytso@mit.edu 69 vijay@tagore.wipinfo.soft.net 70 werme@zk3.dec.com 71 ed_zayas@novell.com 72 jcg161@psu.edu 73 A.McDermott@ftel.co.uk 74 pokallus@ccr-p.ida.org 75 sulee@ingr.com 76 adam@math.tau.ac.il 77 partain@dcs.gla.ac.uk 78 Michael.Kuschke@Materna.DE 79 sgard@earthlink.net 80 kraemerf@vnet.ibm.com 81 menze@retrieveinc.com 82 vahalia@emc.com 83 nconlwf@nabaus.com.au 84 Damon.Atkins@nabaus.com.au 85 Kurt.McDougall@BarwonWater.Vic.Gov.AU 86 skottie@fa.disney.com 87 conrad@apple.com 88 george@thursby.com 89 davidsi@sco.com 90 phils@sco.com 91 luan@almaden.ibm.com 92 jefferson@pa.dec.com 93 knvijay@novell.com
5 Connectathon 98 NFS v4 Update Slide 5 of 12 Protocol vs API Does protocol support API or API support protocol? Filesystem APIs assume local disk: - Infinite bandwidth - Zero latency - Single cache - No failures NFS v4 - Best solution for POSIX? - Best serves needs of POSIX & Win32 API s? - Best file access for Internet?
6 Connectathon 98 NFS v4 Update Slide 6 of 12 File Naming - Unicode? UTF-8? - Case sensitivity - Case preserving - Case sensitive V4 Discussions Facilitate Operation on Internet - Single connection, single protocol - No sideband protocols - Incl MOUNT, NLM, STATMON, RQUOTA - Compound requests c.f. SMB Chaining - Reduce round trips - Simplify protocol
7 Connectathon 98 NFS v4 Update Slide 7 of 12 Proxying - Necessary for Internet scaling - Faster data access for clients Internet Server Proxy Cache Direct Access Clients - Need protocol support for indirection - Access control for cached data
8 Connectathon 98 NFS v4 Update Slide 8 of 12 File/Filesystem Attributes - Core vs extended - Extensible attributes - Access Control Lists (ACLs) - POSIX, DCE/DFS, WinNT? - Attribute naming - String: size mtime type - Number: Bitmap: 0x50ff MOUNT protocol equivalents - Lists of exports and properties - Lists of clients - mount/unmount notification
9 Connectathon 98 NFS v4 Update Slide 9 of 12 File Locking - What kind of locking - POSIX or PC share? - Used for cache consistency, e.g. oplocks? - Callbacks vs leases - Scalability - Locking through proxy Filesystem Model - Multiple, named data streams (NTFS, UDF) Volatile Filehandles Identifying users & groups - UID & GID: integers or strings or...?
10 Connectathon 98 NFS v4 Update Slide 10 of 12 Security - Is RPCSEC_GSS the answer? - Negotiation: SPNEGO or within protocol? Minor Versioning - Add new procedures, attributes, filetypes - Avoid protocol hacks - Standard process
11 Connectathon 98 NFS v4 Update Slide 11 of 12 Network Attached Storage - Fibre Channel SANs - Server can be bottleneck - File access vs block access WAN/LAN Servers Fibre Channel SAN Storage
12 Connectathon 98 NFS v4 Update Slide 12 of 12 Questions? Comments?
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