yes, drbd will mirror the content of block devices between hosts
synchronously or asynchronously. this will provide us data redundancy
between hosts.
perhaps we should use zfs + drbd for mdt and ost?
Thanks
Yu
Patrick Farrell 于2018年6月27日周三 下午9:28写道：
>
> I’m a little puzzled - it can switch,
Hello all,
I've been unable to mount the mdt or osts for a volume since upgrading
to 2.10.4 yesterday (previously 2.10.2).
on the mdt I'm getting:
mount.lustre: mount store/metadata-store at /mnt/metadata-store failed:
File exists
and in the kernel:
Lustre: MGS: Logs for fs newwork were removed
Dear All,
During mdt it ask for --fsname flag , docs mentioned it is a name for
filesystem name to which mdt part of .. that is ok but on client when i
mount /lustre/fsname it mount complete lustre filesystem .
1) Can a mds/mdt serve more than one fsname ?
2) What is the best practice for
Thanks a lot for guidance, I wl kick the installation in 1-2 days.
/Zee
On Wed, Jun 27, 2018 at 2:16 AM Cowe, Malcolm J
wrote:
> You can create pools and format the storage on a single node, provided
> that the correct `--servicenode` parameters are applied to the format
> command (i.e. the
> On Jun 27, 2018, at 3:12 AM, yu sun wrote:
>
> client:
> root@ml-gpu-ser200.nmg01:~$ mount -t lustre
> node28@o2ib1:node29@o2ib1:/project /mnt/lustre_data
> mount.lustre: mount node28@o2ib1:node29@o2ib1:/project at /mnt/lustre_data
> failed: Input/output error
> Is the MGS running?
>
Patrick didn’t say it, but in case it wan’t obvious you could us MDRAID
underneath ldiskfs to achieve redundancy under a single host.
Moreover, if you do, then you can have larger OSTs, which is helpful for file
system usability. You’ll have fewer OSTs to manage and they will be larger,
which
I’m a little puzzled - it can switch, but isn’t the data on the failed disk
lost...? That’s why Andreas is suggesting RAID. Or is drbd doing syncing of
the disk? That seems like a really expensive way to get redundancy, since it
would have to be full online mirroring with all the costs in
yes， you are right, thanks for your great suggestions.
now we are using glusterfs to store training data for ML, and we begin to
investigate lustre to instead glusterfs for performance.
Firstly, yes we do want to get maximum perforance, you means we should use
zfs , for example , not each
Hi Jeremy & All,
I got a request to share the results of my SSK performance investigation
with this group from Mark Hahn, which I'm happy to do! If you're not
interested in the impact on throughput for encryption of client-to-mds and
client-to-oss communication using the SSK feature, you can stop
Hi all,
I just experienced our first asymmetric router failure today, where only
one interface on a subset of our LNET routers was down - however, only
our clients connected directly via that interface detected this.
Unfortunately our Lustre servers, connected to the routers via a
On Jun 27, 2018, at 09:12, yu sun wrote:
>
> client:
> root@ml-gpu-ser200.nmg01:~$ mount -t lustre
> node28@o2ib1:node29@o2ib1:/project /mnt/lustre_data
> mount.lustre: mount node28@o2ib1:node29@o2ib1:/project at /mnt/lustre_data
> failed: Input/output error
> Is the MGS running?
>
client:
root@ml-gpu-ser200.nmg01:~$ mount -t lustre node28@o2ib1:node29@o2ib1:/project
/mnt/lustre_data
mount.lustre: mount node28@o2ib1:node29@o2ib1:/project at /mnt/lustre_data
failed: Input/output error
Is the MGS running?
root@ml-gpu-ser200.nmg01:~$ lctl ping node28@o2ib1
failed to ping
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