Igor Zhbanov wrote:
Hello!
I have several questions about Lustre.
First of all, ClusterFS has commercial support and on the page
http://www.lustre.org/architecture.html I see following:
"On the download pages you can find a ***sample experimental
implementation***
of some the components above. We hope to enhance many of these and many
other components as time goes along. Much documentation can be found
on this site."
Does it mean that there are two separate versions of Lustre file system:
one commercially supported and another one commercially supported?
The lustre.org website is probably out of date. ClusterFS maintains
just 1 GPLed
Lustre now.
Second, I want to build system consisting of several frontend-nodes
and two-four backend (storage) nodes. I don't want to use hardware shared
storage for some reasons. So, I can use some networking block device
to connect two nodes (e.g. DRBD v0.8 in primary/primary mode) if needed.
The question, is it possible to setup Lustre in such configuration:
1) over DRBD or local hard drives if possible on two or four storage
nodes;
We have heard of some success using network block devices, although
your performance will probably be bad.
2) to be able mount Lustre file system at frontend nodes which have no
direct access to shared storage device, i.g. is it possible to mount
Lustre over network?;
That's the whole point of Lustre. Clients just need network connections
to the servers.
3) to have failover and load-balancing storage nodes, so each node
will hold entire copy of stored data, so storage nodes can be accessed
in parallel and if one node goes down, system will function correctly.
To do this you need a true shared storage device, because you need
access to
the data if either node goes down - a device network-shared from a down
node does no good. Lustre does not currently provide a RAID-type of data
backup, although there are future plans to do this.
Is Lustre file system suitable for this?
Thank you.
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