Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
No idea about the performance or why you want to use this set-up, but a simple test shows that it does work: # Test on same host lvcreate -n drbd_one_data -L 1GiB vg1 lvcreate -n drbd_one_meta -L 128M vg1 lvcreate -n drbd_two_data -L 1GiB vg1 lvcreate -n drbd_two_meta -L 128M vg1 # Create resources drbdsetup new-resource one drbdsetup new-resource two # Init metadata drbdmeta --force /dev/drbd0 v08 /dev/vg1/drbd_one_meta 0 create-md drbdmeta --force /dev/drbd0 v08 /dev/vg1/drbd_one_meta 0 apply-al drbdmeta --force /dev/drbd1 v08 /dev/vg1/drbd_two_meta 0 create-md drbdmeta --force /dev/drbd1 v08 /dev/vg1/drbd_two_meta 0 apply-al # Minor numbers drbdsetup new-minor one /dev/drbd0 0 drbdsetup new-minor two /dev/drbd1 0 # Attach disks drbdsetup attach /dev/drbd0 /dev/vg1/drbd_one_data /dev/vg1/drbd_one_meta 0 drbdsetup attach /dev/drbd1 /dev/vg1/drbd_two_data /dev/vg1/drbd_two_meta 0 # Set-up connections drbdsetup connect one localhost:5000 localhost:5001 --verify-alg sha1 drbdsetup connect two localhost:5001 localhost:5000 --verify-alg sha1 # Make one primary drbdsetup primary /dev/drbd0 --force cat /proc/drbd: version: 8.4.3 (api:1/proto:86-101) srcversion: F97798065516C94BE0F27DC 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----- ns:1048576 nr:0 dw:0 dr:1049312 al:0 bm:64 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 1: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----- ns:0 nr:1048576 dw:1048576 dr:0 al:0 bm:64 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0 On 06/19/2014 10:34 AM, Csanad Novak wrote: > Alexey, > > Unfortunately you won't get answer for this question, no matter how > hard you are trying. Let me guess: you'd like it because Amazon EC2? > I've read trough the documentation, asked this question on various > forums, including the company engineers, but the usual answer is: > > - Hey, that would be RAID. > > An other standard answer is goes like Bret's answer: why would you > want this. But even after you are telling why you would want it, there > will be no solid answer at all. > > So my solution is: > > Create a network interface alias with an other IP address and you can > sync the two block device on the same host. > > Cheers > -- > Csanad Novak > Sent with Airmail > > On 19 June 2014 at 8:24:42 pm, Bret Mette (bret.mette at dbihosting.com > <mailto:bret.mette at dbihosting.com>) wrote: > >> I am curious why you would want to use DRBD for that task? Isn't that >> a little overkill? There are other means to do that which certainly >> have less overhead and are easier to configure. >> >> >> - Bret >> >> >> On Wed, Jun 18, 2014 at 4:23 PM, Alexey Orishko >> <alexey.orishko at gmail.com <mailto:alexey.orishko at gmail.com>> wrote: >> >> Hi all, >> >> I got recently across DRBD and it looks like a cool stuff. >> I wonder if someone could clarify for me if it is possible to >> configure DRBD to sync one block device to another block device >> on the >> same host? >> >> Regards, >> Alexey >> _______________________________________________ >> drbd-user mailing list >> drbd-user at lists.linbit.com <mailto:drbd-user at lists.linbit.com> >> http://lists.linbit.com/mailman/listinfo/drbd-user >> >> >> _______________________________________________ >> drbd-user mailing list >> drbd-user at lists.linbit.com >> http://lists.linbit.com/mailman/listinfo/drbd-user > > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20140619/f0c573f2/attachment.htm>