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hi @ll just a quick update...no more oos after 30 days of uptime with heavy writes and cache mode none on all vms...i think i found a good trick on my setup...do a sync and flush the page cache once a day (in the morning) let me hear what you think about it. cheers mac

+1 thnx very much

+1 from me :)

Here´s a little tip... ..shrink your var/lib/vz have fun :)

I have a drbd-cluster. And I know about the unsafeness of writeback mode.

Thanks Stanislav, so should I try writeback mode with a fast raid-controller which also has writeback with bbu ? Best regards, Mac

Hi Rob, do you mean how long until the oos occurs? about 50 days. for now i have to reboot my cluster every month. after reboot the oos will be resynced (about 1,5gb per drbd ressource). after reboot it changes from inconsistent to uptodate. but i need a solution without rebooting and bringing...

Hello guys, with kernel 3.10.0-8-pve the Dell OMSA Storage didn´t get recognised. with kernel 3.10.0-7-pve it worked. What can I do ? P.S.: I helped me now with megacli. best regards Mac

Hi all, I also still have some OOS Probs after booting one of the proxmox hosts...I also switched back to default(no cache)...but with writethrough these probs where there. Now I have the latest updates with kernel 3.10-8 and pve-qemu-2.2...perhaps this is the cure :) mac

Hi, I think it is simple...activate Force Write Back on your Raid Controller / Raid Volume (Bios)...and you should be fine. You should also consider NOT to use RAID5 for Virtualisation just RAID10 brings the IO-Performance.

I´m not using any DB. I just have some time probs and think this would be the cure.

thx cesar...couldn't you do it with the args: -cpu,.... option in the quemu file ?

How could i use it in the qemu config file ?

Many thanks Cesar...are this settings fast enough for my 10GBE drbd-backlink connection? Or could I use higher values? (resnyc-rate, c-mac-rate, etc.)

I´m using Kernel 3.10.5-pve with the DRDB-Tools and Modules 8.4.3..thx

thanks to all...do you have an ideal config file structure and content (drbd common and ressources)?

Thanks Stanislav...but what count should i use on 10GBE NIC to NIC Connection ?

Hi Cesar, thanks for your post. Could you help me? Here is one of my ressource.conf: drbdadm dump Now my question: Is verify-alg similar to data-integrit-alg ? How can I tune my config ? Thanks in advance Mac

I have also still the same problem. Mostly with slower Storage (near-line-sas). And I have the 3.10 kernel. In my case I´m trying now to switch to writethrough and lower the al-extents on the slower storage because after the split-brain thereis alot of resync to do. The strange thing is, on the...

I´m using drbd 8.4 for years now and it is stable. The only thing I had to do since drbd 8.4 is included in kernel 3.10 is, I had to downgrade my drbd8-tools fro 8.4.4 to 8.4.3 cheers mac