Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi,
I have also noticed that after a while, the folder I have delete previously
on the secondo node appear again but.. in a strange form:
??????????? ? ? ? ? ? web
drwxr-xr-x. 8 501 501 97 Sep 15 17:09 services/
Has you can see, the folder seems to exist but I can't access it at all.
Is it a normal behaviour?
Thanks
2016-10-04 10:58 GMT-04:00 Romain Pelissier <romain.pelissier at gmail.com>:
> Hi,
> So first, sorry if you foud this question basic but I am very new to drbd.
> Second, maybe it's perfectly normal but in this case, I will need some
> advices from you gyus :)
>
> Here is my situation:
>
> I use 8.4.7-1 on RHEL 6.5 (2.6.32-642.4.2.el6.x86_64) on my 2 nodes. I use
> drbd with this scenario:
>
> I have an lvm partition formatted as xfs.
> This partition contain ma application database (several Gigs).
> I want to use drbd to have a copy of the partition on the remote node.
>
> Here is my conf:
>
> cat /etc/drbd.d/backup.res
> global { usage-count no; }
> common { syncer { rate 1000M; } }
> resource rc0 {
> protocol C;
> startup {
> wfc-timeout 15;
> degr-wfc-timeout 60;
> }
> net {
> cram-hmac-alg sha1;
> shared-secret "secret2secret";
> }
> on esm65 {
> device /dev/drbd0;
> disk /dev/vg0/lv_arc;
> address 172.31.254.27:7788;
> #meta-disk internal;
> #flexible-meta-disk /dev/vg0/lv_drdb_md;
> meta-disk /dev/vg0/lv_drdb_md;
> }
> on phpesmbck01 {
> device /dev/drbd0;
> disk /dev/vg0/lv_arc;
> address 172.31.254.19:7788;
> #meta-disk internal;
> #flexible-meta-disk /dev/vg0/lv_drdb_md;
> meta-disk /dev/vg0/lv_drdb_md;
> }
> }
>
> The first sync works fine. To test it once completed, I stop drbd on thr
> second node, mount /dec/vg0/lv_arc on a folder and I can see the folders.
> Perferct!
> But..
> For the fun of it, I have renoved a folder on the secondary node drbd
> partition (drbd was stop at that time). then umount it and start drbd
> process.
>
> I check this
>
> cat /proc/drbd
> version: 8.4.7-1 (api:1/proto:86-101)
> GIT-hash: 3a6a769340ef93b1ba2792c6461250790795db49 build by
> mockbuild at Build64R6, 2016-01-12 13:27:11
> 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
> ns:72054328 nr:0 dw:19012784 dr:59035232 al:1170 bm:0 lo:0 pe:0 ua:0
> ap:0 ep:1 wo:f oos:0
>
> So, everything seems to be up to date.
> But If I stop the seocndary node, mount the lvm in a folder, the folder
> that I have deleted earlier is not there but it exists on the primary node.
>
> Is it normal in this case that the status is UpToDate/UpToDate? How can I
> be sure that the 2 partition are really in sync?
>
> Thanks for your explanation!
>
> Romain
>
>
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