* converting from external log to internal log ... is this possible? @ 2014-09-08 18:10 Joe Landman 2014-09-08 18:41 ` Eric Sandeen 0 siblings, 1 reply; 3+ messages in thread From: Joe Landman @ 2014-09-08 18:10 UTC (permalink / raw) To: xfs Figured I'd ask, looked on the FAQ and didn't see anything there relevant to this. There is a hint of this in xfs_growfs, specifically the -i option, though it is noted that "[NOTE: This option is not implemented]". -- Joe Landman _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: converting from external log to internal log ... is this possible? 2014-09-08 18:10 converting from external log to internal log ... is this possible? Joe Landman @ 2014-09-08 18:41 ` Eric Sandeen 2014-09-08 22:07 ` Dave Chinner 0 siblings, 1 reply; 3+ messages in thread From: Eric Sandeen @ 2014-09-08 18:41 UTC (permalink / raw) To: Joe Landman, xfs On 9/8/14 1:10 PM, Joe Landman wrote: > Figured I'd ask, looked on the FAQ and didn't see anything there > relevant to this. There is a hint of this in xfs_growfs, > specifically the -i option, though it is noted that "[NOTE: This > option is not implemented]". Yep, it's never been implemented. You could do it manually with some very careful xfs_db surgery, if you had enough contiguous freespace available, but it's not at all supported. Basically, no, you can't do it without getting very far under the hood and directly editing the disk. -Eric _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: converting from external log to internal log ... is this possible? 2014-09-08 18:41 ` Eric Sandeen @ 2014-09-08 22:07 ` Dave Chinner 0 siblings, 0 replies; 3+ messages in thread From: Dave Chinner @ 2014-09-08 22:07 UTC (permalink / raw) To: Eric Sandeen; +Cc: xfs, Joe Landman On Mon, Sep 08, 2014 at 01:41:49PM -0500, Eric Sandeen wrote: > On 9/8/14 1:10 PM, Joe Landman wrote: > >Figured I'd ask, looked on the FAQ and didn't see anything there > >relevant to this. There is a hint of this in xfs_growfs, > >specifically the -i option, though it is noted that "[NOTE: This > >option is not implemented]". > > Yep, it's never been implemented. You could do it manually with > some very careful xfs_db surgery, if you had enough contiguous > freespace available, but it's not at all supported. > > Basically, no, you can't do it without getting very far under > the hood and directly editing the disk. There's nothing amazingly difficult about implementing external-to-internal journal. First allocate the contiguous extent for the new log, then zero it, then freeze the filesystem to bring the external log down to a clean state, atomically modify the superblock on disk to point at the new log, then re-initialise all the log state to point at the new log, update the head and tail to new cycles at the start of the new log, and unfreeze.... Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-09-08 22:07 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-09-08 18:10 converting from external log to internal log ... is this possible? Joe Landman 2014-09-08 18:41 ` Eric Sandeen 2014-09-08 22:07 ` Dave Chinner
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