I''m curious if it''s possible / wise to configure client mounts to use a cname instead of an IP address (server-cname.org at tcp:/fsname). thanks, --bob
I believe so ... I was using host names with Lustre 1.6.2 and had no issues. Just make sure DNS/name resolution is working properly and consistently. Klaus On 6/2/09 9:04 AM, "Robert Olson" <olson at mcs.anl.gov> etched on stone tablets:> I''m curious if it''s possible / wise to configure client mounts to use > a cname instead of an IP address (server-cname.org at tcp:/fsname). > > thanks, > --bob > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss
OK, thanks. I''m not entirely sure I want my fs mounts to rely on DNS tho... --bob On Jun 2, 2009, at 4:51 PM, Klaus Steden wrote:> > I believe so ... I was using host names with Lustre 1.6.2 and had no > issues. > Just make sure DNS/name resolution is working properly and > consistently. > > Klaus > > On 6/2/09 9:04 AM, "Robert Olson" <olson at mcs.anl.gov> etched on stone > tablets: > >> I''m curious if it''s possible / wise to configure client mounts to use >> a cname instead of an IP address (server-cname.org at tcp:/fsname). >> >> thanks, >> --bob >> _______________________________________________ >> Lustre-discuss mailing list >> Lustre-discuss at lists.lustre.org >> http://lists.lustre.org/mailman/listinfo/lustre-discuss >
On Wed, 2009-06-03 at 10:30 -0500, Robert Olson wrote:> OK, thanks. I''m not entirely sure I want my fs mounts to rely on DNS > tho...That''s one way to look at it. Another is that the resolution is only needed at mount time, and what does work without a functioning DNS anyway? That''s why it''s usually wise to have slave servers. b. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 197 bytes Desc: This is a digitally signed message part Url : http://lists.lustre.org/pipermail/lustre-discuss/attachments/20090603/f28d80e4/attachment.bin
So put the Lustre server entries in /etc/hosts It works, as long as the cname provides the right interface for Lustre. Lustre keeps the IP addresses internally, so the IP address cannot be changed without also modifying the Lustre config -- must match the NIDs used when formatting the filesystem. Kevin Robert Olson wrote:> OK, thanks. I''m not entirely sure I want my fs mounts to rely on DNS > tho... > > --bob > > On Jun 2, 2009, at 4:51 PM, Klaus Steden wrote: > > >> I believe so ... I was using host names with Lustre 1.6.2 and had no >> issues. >> Just make sure DNS/name resolution is working properly and >> consistently. >> >> Klaus >> >> On 6/2/09 9:04 AM, "Robert Olson" <olson at mcs.anl.gov> etched on stone >> tablets: >> >> >>> I''m curious if it''s possible / wise to configure client mounts to use >>> a cname instead of an IP address (server-cname.org at tcp:/fsname). >>> >>> thanks, >>> --bob >>> _______________________________________________ >>> Lustre-discuss mailing list >>> Lustre-discuss at lists.lustre.org >>> http://lists.lustre.org/mailman/listinfo/lustre-discuss >>> > > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss >
There''s someone here pushing for the cnames to apparently keep away from per-client configs; I figure that if we go changing IP addresses we''ve got a bear to deal with anyway. (And we''ll be renumbering later this summer when we move our machine room to a new building -- lustre client mounts will be the least of our concerns...) On Jun 3, 2009, at 10:43 AM, Kevin Van Maren wrote:> So put the Lustre server entries in /etc/hosts > > It works, as long as the cname provides the right interface for > Lustre. Lustre keeps the IP addresses internally, so the IP address > cannot be changed without also modifying the Lustre config -- must > match the NIDs used when formatting the filesystem. > > Kevin > > > Robert Olson wrote: >> OK, thanks. I''m not entirely sure I want my fs mounts to rely on >> DNS tho... >> >> --bob >> >> On Jun 2, 2009, at 4:51 PM, Klaus Steden wrote: >> >> >>> I believe so ... I was using host names with Lustre 1.6.2 and had >>> no issues. >>> Just make sure DNS/name resolution is working properly and >>> consistently. >>> >>> Klaus >>> >>> On 6/2/09 9:04 AM, "Robert Olson" <olson at mcs.anl.gov> etched on >>> stone >>> tablets: >>> >>> >>>> I''m curious if it''s possible / wise to configure client mounts to >>>> use >>>> a cname instead of an IP address (server-cname.org at tcp:/fsname). >>>> >>>> thanks, >>>> --bob >>>> _______________________________________________ >>>> Lustre-discuss mailing list >>>> Lustre-discuss at lists.lustre.org >>>> http://lists.lustre.org/mailman/listinfo/lustre-discuss >>>> >> >> _______________________________________________ >> Lustre-discuss mailing list >> Lustre-discuss at lists.lustre.org >> http://lists.lustre.org/mailman/listinfo/lustre-discuss >> >