Hi Guys, I have two nodes set up using afr. Overnight the first machine died and i've had to rebuild it based on a copy of the second machine (they are both vm's). Is there anything bad that will happen if I start the rebuilt first machine (i've changed the configuration accordingly)? I.e will gluster just pick up on its merry way, get all the updates from the second machine that have occured since the copy and not destroy the filesystem? Thanks! Mike
Hi michael, some are inlined. On Mon, Aug 11 2008 at 5:29 AM, Michael Messig <michael.messig at sitepoint.com> wrote:> Hi Guys, > > I have two nodes set up using afr. Overnight the first machine died and > i've had to rebuild it based on a copy of the second machine (they are > both vm's).after rebuild, are the both nodes identical? If so, did you set extended attributes appropriately for the files you repaired or created (afr uses extended attributes to synchronise files/directories b/w its children). Is there anything bad that will happen if I start the> rebuilt first machine (i've changed the configuration accordingly)?Did you change the glusterfs configuration? If so, can you send the configuration files before and after the failure?> I.e > will gluster just pick up on its merry way, get all the updates from the > second machine that have occured since the copy and not destroy the > filesystem? > > Thanks! > > Mike > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users >-- Raghavendra G A centipede was happy quite, until a toad in fun, Said, "Prey, which leg comes after which?", This raised his doubts to such a pitch, He fell flat into the ditch, Not knowing how to run. -Anonymous -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://supercolony.gluster.org/pipermail/gluster-users/attachments/20080811/73a48af7/attachment.html>
Raghavendra, I didn''t chime in cause I wasn''t sure this would work, but what I always envisioned in a similar situation is the following.. would this work?: set up a new node as a 2nd AFR node with an empty filesystem under gluster. run the find/head command and gluster will realize the local filesystem is behind on everything and will AFR the whole tree? To me, if this would work without risking data loss, this is an ideal way to restore a node. ?? Keith At 08:44 PM 8/10/2008, Raghavendra G wrote:>Hi michael, >some are inlined. > >On Mon, Aug 11 2008 at 5:29 AM, Michael Messig ><<mailto:michael.messig at sitepoint.com>michael.messig at sitepoint.com> wrote: >Hi Guys, > >I have two nodes set up using afr. Overnight the first machine died and >i''ve had to rebuild it based on a copy of the second machine (they are >both vm''s). > > >after rebuild, are the both nodes identical? If so, did you set >extended attributes appropriately for the files you repaired or >created (afr uses extended attributes to synchronise >files/directories b/w its children). > >Is there anything bad that will happen if I start the >rebuilt first machine (i''ve changed the configuration accordingly)? > > >Did you change the glusterfs configuration? If so, can you send the >configuration files before and after the failure? > >I.e >will gluster just pick up on its merry way, get all the updates from the >second machine that have occured since the copy and not destroy the >filesystem? > >Thanks! > >Mike > >_______________________________________________ >Gluster-users mailing list ><mailto:Gluster-users at gluster.org>Gluster-users at gluster.org >http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users > > > > >-- >Raghavendra G > >A centipede was happy quite, until a toad in fun, >Said, "Prey, which leg comes after which?", >This raised his doubts to such a pitch, >He fell flat into the ditch, >Not knowing how to run. >-Anonymous >_______________________________________________ >Gluster-users mailing list >Gluster-users at gluster.org >http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users
Raghavendra, I didn''t chime in cause I wasn''t sure this would work, but what I always envisioned in a similar situation is the following.. would this work?: set up a new node as a 2nd AFR node with an empty filesystem under gluster. run the find/head command and gluster will realize the local filesystem is behind on everything and will AFR the whole tree? To me, if this would work without risking data loss, this is an ideal way to restore a node. ?? Keith At 08:44 PM 8/10/2008, Raghavendra G wrote:>Hi michael, >some are inlined. > >On Mon, Aug 11 2008 at 5:29 AM, Michael Messig ><<mailto:michael.messig at sitepoint.com>michael.messig at sitepoint.com> wrote: >Hi Guys, > >I have two nodes set up using afr. Overnight the first machine died and >i''ve had to rebuild it based on a copy of the second machine (they are >both vm''s). > > >after rebuild, are the both nodes identical? If so, did you set >extended attributes appropriately for the files you repaired or >created (afr uses extended attributes to synchronise >files/directories b/w its children). > >Is there anything bad that will happen if I start the >rebuilt first machine (i''ve changed the configuration accordingly)? > > >Did you change the glusterfs configuration? If so, can you send the >configuration files before and after the failure? > >I.e >will gluster just pick up on its merry way, get all the updates from the >second machine that have occured since the copy and not destroy the >filesystem? > >Thanks! > >Mike > >_______________________________________________ >Gluster-users mailing list ><mailto:Gluster-users at gluster.org>Gluster-users at gluster.org >http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users > > > > >-- >Raghavendra G > >A centipede was happy quite, until a toad in fun, >Said, "Prey, which leg comes after which?", >This raised his doubts to such a pitch, >He fell flat into the ditch, >Not knowing how to run. >-Anonymous >_______________________________________________ >Gluster-users mailing list >Gluster-users at gluster.org >http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users
Raghavendra, I didn''t chime in cause I wasn''t sure this would work, but what I always envisioned in a similar situation is the following.. would this work?: set up a new node as a 2nd AFR node with an empty filesystem under gluster. run the find/head command and gluster will realize the local filesystem is behind on everything and will AFR the whole tree? To me, if this would work without risking data loss, this is an ideal way to restore a node. ?? Keith At 08:44 PM 8/10/2008, Raghavendra G wrote:>Hi michael, >some are inlined. > >On Mon, Aug 11 2008 at 5:29 AM, Michael Messig ><<mailto:michael.messig at sitepoint.com>michael.messig at sitepoint.com> wrote: >Hi Guys, > >I have two nodes set up using afr. Overnight the first machine died and >i''ve had to rebuild it based on a copy of the second machine (they are >both vm''s). > > >after rebuild, are the both nodes identical? If so, did you set >extended attributes appropriately for the files you repaired or >created (afr uses extended attributes to synchronise >files/directories b/w its children). > >Is there anything bad that will happen if I start the >rebuilt first machine (i''ve changed the configuration accordingly)? > > >Did you change the glusterfs configuration? If so, can you send the >configuration files before and after the failure? > >I.e >will gluster just pick up on its merry way, get all the updates from the >second machine that have occured since the copy and not destroy the >filesystem? > >Thanks! > >Mike > >_______________________________________________ >Gluster-users mailing list ><mailto:Gluster-users at gluster.org>Gluster-users at gluster.org >http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users > > > > >-- >Raghavendra G > >A centipede was happy quite, until a toad in fun, >Said, "Prey, which leg comes after which?", >This raised his doubts to such a pitch, >He fell flat into the ditch, >Not knowing how to run. >-Anonymous >_______________________________________________ >Gluster-users mailing list >Gluster-users at gluster.org >http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users
We also considered such an approach, but could not be sure if this would cause problems... It would definitely be an ideal way to restore a node to maintain data integrity! Any light on that would be great! Mike Keith Freedman wrote:> Raghavendra, > > I didn't chime in cause I wasn't sure this would work, but what I > always envisioned in a similar situation is the following.. would > this work?: > > set up a new node as a 2nd AFR node with an empty filesystem under > gluster. > run the find/head command and gluster will realize the local > filesystem is behind on everything and will AFR the whole tree? > > To me, if this would work without risking data loss, this is an ideal > way to restore a node. > > ?? > Keith > > > > At 08:44 PM 8/10/2008, Raghavendra G wrote: >> Hi michael, >> some are inlined. >> >> On Mon, Aug 11 2008 at 5:29 AM, Michael Messig >> <<mailto:michael.messig at sitepoint.com>michael.messig at sitepoint.com> >> wrote: >> Hi Guys, >> >> I have two nodes set up using afr. Overnight the first machine died and >> i've had to rebuild it based on a copy of the second machine (they are >> both vm's). >> >> >> after rebuild, are the both nodes identical? If so, did you set >> extended attributes appropriately for the files you repaired or >> created (afr uses extended attributes to synchronise >> files/directories b/w its children). >> >> Is there anything bad that will happen if I start the >> rebuilt first machine (i've changed the configuration accordingly)? >> >> >> Did you change the glusterfs configuration? If so, can you send the >> configuration files before and after the failure? >> >> I.e >> will gluster just pick up on its merry way, get all the updates from the >> second machine that have occured since the copy and not destroy the >> filesystem? >> >> Thanks! >> >> Mike >> >> _______________________________________________ >> Gluster-users mailing list >> <mailto:Gluster-users at gluster.org>Gluster-users at gluster.org >> http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users >> >> >> >> >> -- >> Raghavendra G >> >> A centipede was happy quite, until a toad in fun, >> Said, "Prey, which leg comes after which?", >> This raised his doubts to such a pitch, >> He fell flat into the ditch, >> Not knowing how to run. >> -Anonymous >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org >> http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users >