That's what I meant. Sorry for the confusion. I'm writing on Client1 (same server as Brick1). Client2 (mounted Brick2, on server2) has nothing writing to it (so far).
My wondering is how I went up on having a split-brain if I'm only writing on one client. On Mon, Jan 26, 2015 at 8:04 PM, Joe Julian <[email protected]> wrote: > Nothing but GlusterFS should be writing to bricks. Mount a client and > write there. > > > On 01/26/2015 01:38 PM, Tiago Santos wrote: > > Right. > > I have Brick1 being constantly written. But I have nothing writing on > Brick2. It just get "healed" data from Brick1. > > This setup is still not in production, and there's no applications using > that data. I have rsyncs constantly updating Brick1 (bring data from > production servers), and then Gluster updates Brick2. > > Which makes me wonder how may I be creating multiple replicas during a > split-brain. > > > It may be the case that, having a split-brain event, I may be updating > versions of the same file on Brick1 (only), and Gluster understands it as > different versions and things get confuse? > > > Anyways, while we talk I'm gonna run Joe's precious procedure on > split-brain recovery. > > > > > > On Mon, Jan 26, 2015 at 7:23 PM, Joe Julian <[email protected]> wrote: > >> Mismatched GFIDs would happen if a file is created on multiple replicas >> during a split-brain event. The GFID is assigned at file creation. >> >> >> On 01/26/2015 01:04 PM, A Ghoshal wrote: >> >>> Yep, so it is indeed a split-brain caused by a mismatch of the >>> trusted.gfid attribute. >>> >>> Sadly, I don't know precisely what causes it. -Communication loss might >>> be one of the triggers. I am guessing the files with the problem are >>> dynamic, correct? In our setup (also replica 2), communication is never a >>> problem but we do see this when one of the server takes a reboot. Maybe >>> some obscure and difficult to understand race between background self-heal >>> and the self heal daemon... >>> >>> In any case, a normal procedure for split brain recovery would work for >>> you if you wish to get you files back in function. It's easy to find on >>> google. I use the instructions on Joe Julian's blog page myself. >>> >>> >>> -----Tiago Santos <[email protected]> wrote: ----- >>> >>> ======================= >>> To: A Ghoshal <[email protected]> >>> From: Tiago Santos <[email protected]> >>> Date: 01/27/2015 02:11AM >>> Cc: gluster-users <[email protected]> >>> Subject: Re: [Gluster-users] Pretty much any operation related to >>> Gluster mounted fs hangs for a while >>> ======================= >>> Oh, right! >>> >>> Follow the outputs: >>> >>> >>> root@web3:/export/images1-1/brick# time getfattr -m . -d -e hex >>> templates/assets/prod/temporary/13/user_1339200.png >>> # file: templates/assets/prod/temporary/13/user_1339200.png >>> trusted.afr.site-images-client-0=0x000000000000000400000000 >>> trusted.afr.site-images-client-1=0x000000020000000900000000 >>> trusted.gfid=0x10e5894c474a4cb1898b71e872cdf527 >>> >>> real 0m0.024s >>> user 0m0.001s >>> sys 0m0.001s >>> >>> >>> >>> root@web4:/export/images2-1/brick# time getfattr -m . -d -e hex >>> templates/assets/prod/temporary/13/user_1339200.png >>> # file: templates/assets/prod/temporary/13/user_1339200.png >>> trusted.afr.site-images-client-0=0x000000000000000000000000 >>> trusted.afr.site-images-client-1=0x000000000000000000000000 >>> trusted.gfid=0xd02f14fcb6724ceba4a330eb606910f3 >>> >>> real 0m0.003s >>> user 0m0.000s >>> sys 0m0.006s >>> >>> >>> Not sure exactly what that means. I'm googling, and would appreciate if >>> you >>> guys can bring some light. >>> >>> Thanks! >>> -- >>> Tiago >>> >>> >>> >>> >>> On Mon, Jan 26, 2015 at 6:16 PM, A Ghoshal <[email protected]> wrote: >>> >>> Actually you ran getfattr on the volume - which is why the requisite >>>> extended attributes never showed up... >>>> >>>> Your bricks are mounted elsewhere. >>>> /exports/images1-1/brick, and exports/images2-1/brick >>>> >>>> Btw, what version of Linux do you use? And, are the files you observe >>>> the >>>> input/output errors on soft-links? >>>> >>>> -----Tiago Santos <[email protected]> wrote: ----- >>>> >>>> ======================= >>>> To: A Ghoshal <[email protected]> >>>> From: Tiago Santos <[email protected]> >>>> Date: 01/27/2015 12:20AM >>>> Cc: gluster-users <[email protected]> >>>> Subject: Re: [Gluster-users] Pretty much any operation related to >>>> Gluster >>>> mounted fs hangs for a while >>>> ======================= >>>> Thanks for you input, Anirban. >>>> >>>> I ran the commands on both servers, with the following results: >>>> >>>> >>>> root@web3:/var/www/site-images# time getfattr -m . -d -e hex >>>> templates/assets/prod/temporary/13/user_1339200.png >>>> >>>> real 0m34.524s >>>> user 0m0.004s >>>> sys 0m0.000s >>>> >>>> >>>> root@web4:/var/www/site-images# time getfattr -m . -d -e hex >>>> templates/assets/prod/temporary/13/user_1339200.png >>>> getfattr: templates/assets/prod/temporary/13/user_1339200.png: >>>> Input/output >>>> error >>>> >>>> real 0m11.315s >>>> user 0m0.001s >>>> sys 0m0.003s >>>> root@web4:/var/www/site-images# ls >>>> templates/assets/prod/temporary/13/user_1339200.png >>>> ls: cannot access templates/assets/prod/temporary/13/user_1339200.png: >>>> Input/output error >>>> >>>> >>>> =====-----=====-----===== >>> Notice: The information contained in this e-mail >>> message and/or attachments to it may contain >>> confidential or privileged information. If you are >>> not the intended recipient, any dissemination, use, >>> review, distribution, printing or copying of the >>> information contained in this e-mail message >>> and/or attachments to it are strictly prohibited. If >>> you have received this communication in error, >>> please notify us by reply e-mail or telephone and >>> immediately and permanently delete the message >>> and any attachments. Thank you >>> >>> >>> >>> _______________________________________________ >>> Gluster-users mailing list >>> [email protected] >>> http://www.gluster.org/mailman/listinfo/gluster-users >>> >> >> _______________________________________________ >> Gluster-users mailing list >> [email protected] >> http://www.gluster.org/mailman/listinfo/gluster-users >> > > > > -- > *Tiago Santos* > MustHaveMenus.com > > > -- *Tiago Santos* MustHaveMenus.com
_______________________________________________ Gluster-users mailing list [email protected] http://www.gluster.org/mailman/listinfo/gluster-users
