Don't know yet. Thinking about using pacemaker, for high availability. But have a manually recovery to avoid split brain - corruption data situations. Maybe we are going to use three-four servers to have a disaster recovery site.
Andres. -----Original Message----- From: Digimer [mailto:li...@alteeve.ca] Sent: Thursday, 5 October, 2017 12:43 PM To: José Andrés Matamoros Guevara <amatamo...@ie.com.sv>; drbd-user@lists.linbit.com Subject: Re: [DRBD-user] Moving TeraBytes to drbd device Will you be using pacemaker for auto-recovery, or are you planning to do fully manual recovery? digimer On 2017-10-05 12:19 PM, José Andrés Matamoros Guevara wrote: > OK. That's a procedure I have thought about, but didn't know if there were > another more effective. I just have to check how much data I have to sync > during the window. > > Last question: what kind of test do you recommend to check the new drbd > system? I have configure a few systems but never this important. > > Thanks again, > > Andres. > > > -----Original Message----- > From: Digimer [mailto:li...@alteeve.ca] > Sent: Wednesday, 4 October, 2017 11:11 PM > To: José Andrés Matamoros Guevara <amatamo...@ie.com.sv>; > drbd-user@lists.linbit.com > Subject: Re: [DRBD-user] Moving TeraBytes to drbd device > > If it were up to me, given what I understand of your requirements (which is > minimal), I'd look at setting up the new DRBD system. Test it carefully and > when ready, do an rsync to get the bulk data over. When your windows opens, > re-run the rsync to copy just what's changed. > > If you're asking how to setup a DRBD based system, we'll need to know more > about what you want the system to do. > > cheers, > > digimer > > On 2017-10-04 11:29 PM, José Andrés Matamoros Guevara wrote: >> Thanks for your answer. >> >> Yes, I need to copy a SAN to a new drbd system. And yes, I'll check >> with LinBit for support if I don't find a safe solution for myself. >> >> Just a question: I have been looking through the LinBit documents and >> haven't found exactly what I was looking for. If you can point me >> about what document/documents or topics I have to read about, will be great. >> >> Thanks for the info. >> >> Andres. >> >> -----Original Message----- >> From: Digimer [mailto:li...@alteeve.ca] >> Sent: Tuesday, 3 October, 2017 6:10 PM >> To: José Andrés Matamoros Guevara <amatamo...@ie.com.sv>; >> drbd-user@lists.linbit.com >> Subject: Re: [DRBD-user] Moving TeraBytes to drbd device >> >> On 2017-10-03 06:57 PM, José Andrés Matamoros Guevara wrote: >>> I have been consulted about moving multiple Terabytes to a new >>> system using drbd to ensure high availability. I have been thinking >>> on multiple scenarios to move the data as fast as I can and to have >>> a minimal maintenance window to change the systems. >>> >>> Is there any how-to or recommendation about it? I know it is not >>> exactly a drbd consult but I supposed you have been using it for a >>> while and have more idea about a best practice. I have thought to >>> have a backup program to copy the data and then update it during the >>> maintenance window, but been lots of TB, the reading/writing data >>> time is going to be the factor to consider. >>> >>> Thanks in advance and best regards, Andres. >> >> The best answer is to engage LINBIT for commercial support if you've >> been tasked with a sensitive project and a minimal window to do it in. >> >> That said, I'll share what comes to mind; >> >> If you mean "move" as in "copy the data to a new system that already >> has DRBD configured and tested", then it is merely a question of hardware. >> Make sure you have a sufficiently fast new system to accept the >> incoming volume of data within the prescribed time frame. DRBD itself >> has minimal overhead, so it is really a question of the speed of the >> disks and the replication link. >> >> If you mean to convert an existing filesystem on existing hardware to >> be backed by DRBD, then you need to either grow the backing storage >> by ~32MiB per TiB of existing data, or setup a matching sized storage >> device and configure external metadata. With that extra space, you >> can setup DRBD and it will see the existing FS and data fine. You'll >> need a full resync to the new peer, of course. Also, test/practice >> outside prod thoroughly to be certain you have the steps down pat. >> >> There are docs on how to do this openly available on LINBIT's website. >> If you get stuck on certain steps, post specific questions and we'll help. >> >> -- >> Digimer >> Papers and Projects: https://alteeve.com/w/ "I am, somehow, less >> interested in the weight and convolutions of Einstein’s brain than in >> the near certainty that people of equal talent have lived and died in >> cotton fields and sweatshops." - Stephen Jay Gould >> > > > -- > Digimer > Papers and Projects: https://alteeve.com/w/ "I am, somehow, less > interested in the weight and convolutions of Einstein’s brain than in > the near certainty that people of equal talent have lived and died in > cotton fields and sweatshops." - Stephen Jay Gould > -- Digimer Papers and Projects: https://alteeve.com/w/ "I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops." - Stephen Jay Gould _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user
