[OpenAFS] Openafs versions
huangql
huangql@ihep.ac.cn
Mon, 23 Mar 2015 13:21:08 +0800
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charse=
t=3DISO-8859-1"><style>body { line-height: 1.5; }blockquote { margin-top: =
0px; margin-bottom: 0px; margin-left: 0.5em; }body { font-size: 10.5pt; fo=
nt-family: ????; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><b=
ody>=0A<div><span></span>Hi Ben,</div><div><br></div><div>Thank you for yo=
ur prompt and detailed reply.</div><div><br></div><div>I will just upgrade=
the AFS File server except the database server(1.4.14). </div><div><=
br></div><div><br></div><div>Let me thank you again.</div><div><br></div><=
div><br></div><div>Cheers,</div><div>Qiulan</div><div><br></div><div><br><=
/div>=0A<div><br></div><hr style=3D"width: 210px; height: 1px;" color=3D"#=
b5c4df" size=3D"1" align=3D"left">=0A<div><span><div style=3D"MARGIN: 10px=
; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div>huangql</div></div></span></=
div>=0A<blockquote style=3D"margin-top: 0px; margin-bottom: 0px; margin-le=
ft: 0.5em;"><div> </div><div style=3D"border:none;border-top:solid #B=
5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT: 8px; P=
ADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGR=
OUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b>&nb=
sp;<a href=3D"mailto:kaduk@MIT.EDU">Benjamin Kaduk</a></div><div><b>Date:<=
/b> 2015-03-23 12:04</div><div><b>To:</b> <a href=3D"mailto=
:huangql@ihep.ac.cn">huangql</a></div><div><b>CC:</b> <a href=3D"mail=
to:openafs-info@openafs.org">openafs-info</a></div><div><b>Subject:</b>&nb=
sp;Re: Re: [OpenAFS] Openafs versions</div></div></div><div><div>On Sun, 2=
2 Mar 2015, huangql wrote:</div>=0A<div> </div>=0A<div>> Hi Ben,</=
div>=0A<div>></div>=0A<div>> Many thanks.</div>=0A<div>></div>=0A=
<div>> Do the 1.4.14 and 1.6.11 File servers work together? Because I d=
on't</div>=0A<div>> plan to upgrade all file servers at the same time.<=
/div>=0A<div> </div>=0A<div>Yes, they interoperate just fine.</div>=
=0A<div> </div>=0A<div>To give a more detailed/pedantically correct a=
nswer, file servers register</div>=0A<div>themselves in the volume locatio=
n database, but are otherwise standalone</div>=0A<div>entities; there is n=
o real concern about version skew between a fileserver</div>=0A<div>and th=
e database servers, since the RPCs that the fileserver uses to</div>=0A<di=
v>register itself are unlikely to be removed (and must not be changed in a=
</div>=0A<div>backward-incompatible way). The database servers, howe=
ver, do a lot of</div>=0A<div>communicating amongst themselves, in particu=
lar via the ubik interface,</div>=0A<div>which presents a raw "disk" inter=
face to the distributed database. The</div>=0A<div>format of the dat=
a exchanged over this ubik interface is *not* guaranteed</div>=0A<div>to r=
emain constant and compatible across major version changes; however,</div>=
=0A<div>there were no such changes between the 1.4 and 1.6 series, so runn=
ing 1.4</div>=0A<div>and 1.6 database servers in the same cell is safe.&nb=
sp; Version 1.8 is also</div>=0A<div>unlikely to introduce inompatible dat=
abase format changes, but version 2.0</div>=0A<div>is expected to do so.</=
div>=0A<div> </div>=0A<div>-Ben Kaduk</div>=0A</div></blockquote>=0A<=
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