On Wed, 19 Nov 2003, Laurent Imbaud wrote:
> But I see nowhere a single way of moving the log, say to an external
> device if disk seek is suspected to be a performance issue, short of
> backing up the data, doing a new mkfs.xfs and copying back.
xfs_growfs could gain this feature, patches gladly accepted... :)
But, some xfs_db trickery can also do this.
I'll follow up with a recipe.
> On a related issue, some idea of how big the log should be would be
> worth documenting more precisely. mkfs.xfs complained the logdev
> partition was too big in one manipulation, stating a maximum of 12k
> blocks (forgive me if this is not entirely accurate, I did not write
> down the exact message).
Yes, there is max log size, if your device is too large you can still
use it, just limit the size of the log at mkfs time.
> It would seem simple, convenient and desirable for administrators to
> move the location of the log at anytime, even, while the system is
> mounted. Solid state disks come cheap nowadays and would make great
> log devices, especially if one could point and xfs to log there after it
> has been in production for a while.
I was playing with this once; it is certainly technically possible.
However, it's not very high on the priority list at the moment.
-Eric
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