On Tue, 2008-09-23 at 16:16 -0400, Ms. Megan Larko wrote: > Hi, Hi,
> General question: I know that a Lustre filesystem may have only one > MGS running in-general and only one MDS for a specific lustre > filesystem (for example, /usrdisk and /admin1). Correct. > Is there a way in > which a Lustre filesystem may have one MGS and one MDS which runs on > another machine in the network? Sure. There is no requirement that the MGS and MDT be in the same machine. > I have an MGS/MDS combo running right now. Ugh. You really should [have] separate[d] them. We didn't really intend combo mgs/mdts for more than the most simple and/or "toy" deployments. > I wish to add more disk > space to our Lustre clients, More space to an existing filesystem or a new filesystem? > I have no disks available in the > current MGS/MDS on which to create an MDT for the new /scr1 disk. Can > I point the MGS to use a disk physically on another computer as the > MDT? Sure. > Lower priority question: Is lustre a good tool for such a user > scratch disk system? If the use case/needs of your scratch filesystem meet Lustre's abilities, sure. In general Lustre shines in cases of large files that need lots of I/O bandwidth. It's not so good at the "small file" scenario though. It's not terrible, just not great. b.
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