share a RAM disk

[jmo]

Hi all,

I need a fast shared OCFS2 file system, with very low amount of data but some traffic (mostly file locking and a few bytes of update per file per second, on about 40 files). The data is transient, starting from scratch after a DSS reboot is absolutely ok.

Currently, when we have specific high NFS load on our DSSv6 server, the response time for the OCFS2 FS (DSSv6 is FC target, too, the LUN is accessed from two servers via FC and resides on a RAID6, file-based) drops noticably and affects our operations.

The bottle neck seems to be the RAID controller (or the disks), I suspect the controller cache is flooded with interfering small updates as the DSS XFS volumes aren't tuned to the stripe size.

As a work-around, I'd like to put a FC-shared LUN on a DSSv6 RAM disk... any support for that? As we're working file-based atm, this most probably would need a mechanism to re-create the LUN file after each reboot... so I'm probably out of luck but thought I might just ask...

Regards,
jmo

[Gr-R]

1- try tuning your strip size on the controller.
2- try using SSD disks.

creating a LUN on RAMdisk isn't going to be possible.

[jmo]

1- try tuning your strip size on the controller.
2- try using SSD disks.

creating a LUN on RAMdisk isn't going to be possible.

yes, SSD was "plan B"

Thanks for the quick confirmation - and seasonal greetings to all of you!

With regards,
jmo